Model 8010 High Power Device Test Fixture User`s Manual

Model 8010 High Power Device Test Fixture User`s Manual
www.keithley.com
Model 8010
High Power Device Test Fixture
User’s Manual
8010-900-01 Rev. A / February 2012
A
G R E A T E R
M E A S U R E
O F
C O N F I D E N C E
Model 8010
High Power Device Test Fixture
User's Manual
© 2012, Keithley Instruments, Inc.
Cleveland, Ohio, U.S.A.
All rights reserved.
Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part,
without the prior written approval of Keithley Instruments, Inc. is strictly prohibited.
All Keithley Instruments product names are trademarks or registered trademarks of Keithley
Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective
holders.
The Lua 5.0 software and associated documentation files are copyright © 1994-2008, Tecgraf,
PUC-Rio. Terms of license for the Lua software and associated documentation can be accessed at
the Lua licensing site (http://www.lua.org/license.html).
Document number: 8010-900-01 Rev. A / February 2012
Safety Precautions
The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using
the product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.
Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I and
Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most
measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or
to voltage sources with high transient overvoltages. Measurement Category II connections require protection for high transient
overvoltages often associated with local AC mains connections. Assume all measurement, control, and data I/O connections are
for connection to Category I sources unless otherwise marked or described in the user documentation.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test
fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.
The instrument and accessories must be used in accordance with its specifications and operating instructions, or the safety of
the equipment may be impaired.
11/07
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a
screw is present, connect it to safety earth ground using the wire recommended in the user documentation.
The ! symbol on an instrument means caution, risk of danger. The user should refer to the operating instructions located in
the user documentation in all cases where the symbol is marked on the instrument.
symbol on an instrument means caution, risk of electric shock. Use standard safety precautions to avoid personal
The
contact with these voltages.
The
symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The
symbol indicates a connection terminal to the equipment frame.
Hg
symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
If this
properly disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power
transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national
safety approvals may be used if the rating and type are the same. Other components that are not safety-related may be
purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be
purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the
applicability of a replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled
according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning/servicing.
11/07
Table of Contents
Welcome ...................................................................................................................... 1-1
Welcome .............................................................................................................................. 1-1
Extended warranty ............................................................................................................... 1-2
Organization of manual sections.......................................................................................... 1-2
General information.............................................................................................................. 1-2
Contact information ................................................................................................................... 1-2
Unpacking and inspection ......................................................................................................... 1-2
Accessories............................................................................................................................... 1-2
Characteristics .......................................................................................................................... 1-3
Connecting instruments to the Model 8010 ............................................................. 2-1
Rear panel overview ............................................................................................................ 2-1
Installing the test boards ...................................................................................................... 2-3
Using the interlock................................................................................................................ 2-5
Connections to the rear panel.............................................................................................. 2-5
Model 2611A and Model 2612A connections ............................................................................ 2-6
Model 2635A and Model 2636A connections ............................................................................ 2-7
Model 2651A connections ......................................................................................................... 2-8
Model 2657A connections ......................................................................................................... 2-9
Model 4200 and Model 4210-SMU connections...................................................................... 2-10
Model 4200 and Model 4210-SMU with preamplifier connections........................................... 2-11
Internal protection circuitry ...................................................................................................... 2-12
Using the access port on the Model 8010.......................................................................... 2-12
Working with devices and instruments .................................................................... 3-1
Safety information ................................................................................................................ 3-1
About the device test boards ............................................................................................... 3-1
Installing a device in the axial posts..................................................................................... 3-2
Installing a device in the TO socket ..................................................................................... 3-3
Using the insulating plug ...................................................................................................... 3-3
Measurement considerations............................................................................................... 3-4
Suppressing device oscillations ................................................................................................ 3-6
Using the guard terminal ...................................................................................................... 3-8
Off-state characterization of a power MOSFET........................................................ 4-1
Introduction .......................................................................................................................... 4-1
Equipment needed ............................................................................................................... 4-2
Set up communication.......................................................................................................... 4-2
Device connections .............................................................................................................. 4-3
Install the device and make connections ............................................................................. 4-6
Table of Contents
Model 8010 High Power Device Test Fixture User's Manual
BVdss measurement............................................................................................................ 4-6
Example program code ............................................................................................................. 4-7
Example program usage ........................................................................................................... 4-8
Idss measurement................................................................................................................ 4-9
Example program code ............................................................................................................. 4-9
Example program usage ......................................................................................................... 4-12
Axial-lead device high current test ........................................................................... 5-1
Introduction .......................................................................................................................... 5-1
Equipment needed ............................................................................................................... 5-1
Connect the instrument to the Model 8010 .......................................................................... 5-2
Install the device and make connections ............................................................................. 5-3
Set up communication.......................................................................................................... 5-3
Example program code ........................................................................................................ 5-4
Example program usage ...................................................................................................... 5-9
On-state characterization of a power MOSFET........................................................ 6-1
Introduction .......................................................................................................................... 6-1
Equipment required for this example ................................................................................... 6-2
Connect instruments to the Model 8010 .............................................................................. 6-2
Install the device and make connections ............................................................................. 6-6
Suppressing device oscillations (optional) ........................................................................... 6-7
Set up communication.......................................................................................................... 6-8
Example program code ........................................................................................................ 6-9
Example program usage .................................................................................................... 6-16
Troubleshooting FAQs ............................................................................................... 7-1
Noisy low current measurements......................................................................................... 7-1
Interlock error message ....................................................................................................... 7-1
Can high-current SMUs be used separately inside the fixture? .......................................... 7-1
The device is oscillating. How do I correct this? .................................................................. 7-2
Can I use local sense for high-current or lower power SMUs?............................................ 7-2
Can I operate the test fixture with the lid open? .................................................................. 7-2
Maintenance ................................................................................................................ 8-1
Replacing the boards ........................................................................................................... 8-1
How to clean the Model 8010 Test Fixture .......................................................................... 8-1
Connector and socket cleaning............................................................................................ 8-2
Adjusting the lid hinges ........................................................................................................ 8-2
ii
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Table of Contents
Next steps.................................................................................................................... 9-1
Additional information........................................................................................................... 9-1
Index.............................................................................................................................. I-1
8010-900-01 Rev. A / February 2012
iii
Section 1
Welcome
In this section:
Welcome .................................................................................. 1-1
Extended warranty ................................................................... 1-2
Organization of manual sections .............................................. 1-2
General information.................................................................. 1-2
Welcome
Thank you for choosing a Keithley Instruments product. The Model 8010 High Power Device Test
Fixture provides a safe, low noise, complete environment for testing a variety of packaged device
types. The replaceable socket module test boards allow for a variety of package types, including the
user-supplied socket types.
The Model 8010 allows you to connect one Model 2657A High Power SourceMeter for up to 3 KV
testing. You can connect up to two Model 2651A High Power SourceMeters for 15 A DC testing or
50 A or 100 A pulse testing. For lower power terminals, you can connect up to two other
SourceMeters, such as Models 2611A, 2612A, 2635A, 2636A, 4200-SMU or 4210-SMU.
The Model 8010 includes:
•
•
•
•
Kelvin (remote sense) connections for five instruments
•
Two independent test sockets, one for high current and one for high voltage
Guarded pathways for picoampere level measurements even at 3 KV
An access port for a variety of probes, such as scope or temperature
Integrated protection circuits to protect Models 2611A, 2612A, 2635A, 2636A, 4200-SMU, and
4210-SMU from high voltage instruments
The test fixture is fully interlocked, providing safe operation for up to six different instruments. It is
declared safe through CE marking and certified through nationally recognized testing laboratories.
The Model 8010 is shipped with two 8010-DTB high power socket module test boards installed. The
boards include sockets for TO-247 and axial lead devices.
The high current side of the test fixture can be used with up to 100 amps pulsed, 15 amps DC,
200 VDC. Up to four measurement resources can be connected (two high current, two low power).
The high voltage side of the test fixture can be used with up to 3030 VDC at 120 mA, 200 VDC up to
10 A pulsed. Connections are provided for up to three measurement resources (one high voltage, two
low power).
Additional socket module test boards are available. The 8010-CTB Customizable Test Board allows
you to add your own socket. The 8010-DTB-220 Test Board is for use with three-terminal TO-220 or
TO-247 devices and is limited to 1000 V and the maximum rated current of the test fixture.
Section 1: Welcome
Model 8010 High Power Device Test Fixture User's Manual
Extended warranty
Additional years of warranty coverage are available on many products. These valuable contracts
protect you from unbudgeted service expenses and provide additional years of protection at a fraction
of the price of a repair. Extended warranties are available on new and existing products. Contact your
local Keithley Instruments representative for details.
Organization of manual sections
The first part of this user manual provides general information that helps you set up, install, and make
connections to the test fixture.
The sections after the general sections provide information that helps you use the Model 8010 with
specific SourceMeter Instruments. This information includes applications that can help you set up
your tests.
The last part of the user manual provides maintenance and troubleshooting information. It also
provides references to additional resources.
Bookmarks for each section of this manual are provided in the PDF. The manual sections are also
listed in the Table of Contents located at the beginning of the manual.
For more information about bookmarks, see Adobe® Acrobat® or Reader® help.
General information
Contact information
If you have any questions after you review the information in this documentation, please contact your
local Keithley Instruments representative or call Keithley Instruments corporate headquarters (toll-free
inside the U.S. and Canada only) at 1-888-KEITHLEY (1-888-534-8453), or from outside the U.S. at
+1-440-248-0400. For worldwide contact numbers, visit the Keithley Instruments website
(http://www.keithley.com).
Unpacking and inspection
Each Model 8010 was carefully inspected electrically and mechanically before shipment.
After you unpack all items from the shipping carton, check for any obvious signs of physical damage
that may have occurred during transit. Report any damage to the shipping agent immediately. Save
the original packing carton for possible future shipment.
Accessories
See the "Model 8010 High Power Device Test Fixture Interconnection Reference Guide" for detail on
provided accessories.
1-2
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 1: Welcome
Characteristics
For indoor use only.
Maximum signal
voltage (signal or
guard to any signal)
Maximum signal
current
Maximum combined
DC current
Three-lug high voltage triaxial connector: 3280 V
Three-lug standard triaxial connector: 210 V
Eight-pin screw terminal connector: 40 V
Two-pin high current screw terminal connector: 40 V
Three-lug high voltage triaxial connector: 120 mA DC
Three-lug standard triaxial connector: 1.5 A DC
Eight-pin screw terminal block: 1 A DC
Two-pin high-current screw terminal connector: 15 A DC, 50 A
pulsed with one SMU; 100 with two SMUs
15 A DC
Maximum pulse current 100 A at 1% duty cycle for Model 2651A High Power SourceMeter
Instrument path
10 A at 1% duty cycle for Series 2600A and Model 4200 paths
Maximum 2000 m above sea level
Altitude
Operating environment 0 °C to 50 °C, 70% relative humidity up to 35 °C. Derate 3%
relative humidity/°C, 35 °C to 50 °C
-25 °C to 65 °C
Storage
Safety
8010-900-01 Rev. A / February 2012
Listed to UL61010-1:2004
Conforms to European Union Low Voltage Directive
1-3
Section 2
Connecting instruments to the Model 8010
In this section:
Rear panel overview ................................................................ 2-1
Installing the test boards .......................................................... 2-3
Using the interlock.................................................................... 2-5
Connections to the rear panel .................................................. 2-5
Using the access port on the Model 8010 .............................. 2-12
Rear panel overview
Instrument connections are made to the rear panel of the Model 8010.
The rear panel of Model 8010 is shown below. Descriptions of the rear panel connections are
provided after the graphic.
Figure 1: Model 8010 rear panel
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
HI
LO
2651A#2
SENSE/GUARD
S
LO G
G
G
S
G HI
SH
HI
LO,SL
SH
HI
SENSE/GUARD
HI
S
LO G
G
G
S
G HI
INPUT
LO
!
LO,SL
3280V, 120mA DC MAX.
!
INPUT
LO
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#2
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
!
4200
INTERLOCK
26XXA
INTERLOCK
MADE IN
U.S.A.
1234567890
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERVICE BY QUALIFIED PERSONNEL ONLY.
The rear panel options are described on the following pages.
HI
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
The access port on the lid can be used to bring in connections for external
instrumentation.
The Model 2657A connectors provide sense HI, HI, LO, and sense LO
input connections for the Model 2657A instruments.
Connections are as follows:
SH
HI
LO,SL
•
•
•
SH = Sense HI
HI = HI
LO, SL = LO, sense LO
The Model 2600A#2 connectors provide sense HI, HI, LO, and sense LO
input connections for Model 2600A instruments.
Connections are as follows:
SH
HI
LO,SL
•
•
•
SH = Sense HI
HI = HI
LO, SL = LO, sense LO
The Model 2600A#1 connectors provide sense HI, HI, LO, and sense LO
input connections for Model 2600A instruments.
Connections are as follows:
SH
HI
SH
HI
LO,SL
•
•
•
The 4200-SMU connectors provide sense HI and HI input connections for
Model 4200-SMU instruments.
Connections are as follows:
•
•
LO
•
•
G
G
S
G HI
LO = LO
SL = Sense LO
The 2651A #2 SENSE/GUARD connector provides Model 2651A input
connections for sense HI, sense LO, and guard. Connections are as
follows:
•
•
•
2-2
SH = Sense HI
HI = HI
The 4200 GND UNIT connectors provide LO and sense LO input
connections for Model 4200-SMU instruments.
Connections are as follows:
SL
S
LO G
SH = Sense HI
HI = HI
LO, SL = LO, sense LO
S LO = Sense LO
G = Guard
S HI = Sense HI
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
LO
S
LO G
The 2651A#2 INPUT connector provides Model 2651A input connections
for LO and HI.
HI
G
G
S
G HI
The 2651A #1 SENSE/GUARD connector provides Model 2651A input
connections for sense HI, sense LO, and guard. Connections are as
follows:
•
•
•
S LO = Sense LO
G = Guard
S HI = Sense HI
The 2651A#1 INPUT connector provides Model 2651A input connections
for LO and HI.
INPUT
LO
Section 2: Connecting instruments to the Model 8010
HI
Ground screws for connections to protective earth (safety ground).
The 4200 Interlock provides an interlock connection for the
Model 4200-SMU and 4210-SMU instruments.
The Model 26XXA Interlock provides interlock connections for the Model 2611A,
2612A, 2635A, 2636A, 2651A, and 2657A instruments. You can have multiple
interlocks connected. You can use any one of the interlock connectors.
Installing the test boards
The Model 8010 is shipped with two 8010-DTB Device Test Boards installed. The boards include
connections for TO-247 and axial-lead devices.
The Model 8010 is also shipped with an 8010-CTB Customizable Test Board, which allows you to
add your own connections.
In addition, you can purchase the 8010-DTB-220 Device Test Board for use with three-terminal
TO-220 or TO-247 devices. This board is limited to 1000 V.
You can also purchase replacement 8010-DTB boards and 8010-CTB boards.
The following instructions explain how to replace a pre-installed test board with another test board.
WARNING
Before installing or replacing test boards, make sure you remove all electrical connections to
the test fixture. Failure to disconnect power may result in personal injury or death due to
electric shock.
8010-900-01 Rev. A / February 2012
2-3
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
Tool required
•
Medium Phillips head screwdriver
Assembly instructions
NOTE
If you are customizing the 8010-CTB Customizable Test Board, make customizations before installing
it in the Model 8010.
1. Remove any external power that is connected to the test fixture through connected devices or
devices under test (DUTs).
2. In the test fixture, remove the four Phillips flat-head screws that secure the board you want to
replace.
3. Set the replacement board in the test fixture with the yellow connectors (connectors 3 and 6)
oriented toward the rear of the fixture. Line up the pre-drilled screw holes in the board with the
screw holes in the fixture.
4. Thread four of the Phillips flat-head screws through the replacement board.
5. Tighten the screws.
Figure 2: Model 8010 device test board installation
2-4
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 2: Connecting instruments to the Model 8010
Using the interlock
The Model 8010 can be connected to instruments that can output hazardous live voltages. To ensure
operator safety, the Model 8010 provides a built-in interlock switch. The interlock switch is engaged
when the Model 8010 lid is closed and latched. When the interlock switch is engaged, the light on the
lower left of the Model 8010 enclosure is illuminated. You can turn on a SMU output only when the
interlock switch is engaged.
If the lid is open, the interlock switch will not engage and any SMUs with outputs that are configured
for high voltage will not turn on.
If the lid of the Model 8010 test fixture opens:
•
•
•
The interlock switch opens and the interlock is disengaged.
The interlock pin is pulled low.
The output of the SMU turns off.
If the interlock switch is disengaged, the outputs of any instruments with interlock connections to the
test fixture are turned off. The outputs cannot be turned back on until the interlock switch is engaged.
The output is not automatically turned on when the interlock switch is engaged.
For detailed information on the interlock requirements for a specific SMU, see the reference manual
for that SMU.
Connections to the rear panel
This section describes the connections you can make to the rear panel of the Model 8010.
WARNING
The ground wires must be attached to a known protective earth (safety ground) before
powering on instruments. Failure to attach the ground wires to a known protective earth may
result in electric shock.
The input/output terminals of the Model 8010 High Power Device Test Fixture are rated for
connection to circuits rated Installation Category I only, with transients rated less than 1500 V
peak above the rated input. Do not connect the Model 8010 terminals to CAT II, CAT III, or CAT
IV circuits. Connection of the Model 8010 terminals to circuits higher than CAT I can cause
damage to the equipment or expose the operator to hazardous voltage.
8010-900-01 Rev. A / February 2012
2-5
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
Model 2611A and Model 2612A connections
The Model 8010 includes internal protection circuitry for the Model 2611A and 2612A SMUs. If there
is a device under test (DUT) failure, this circuitry protects the SMUs from high voltage from the
Model 2657A.
NOTE
The LO terminal is connected to chassis ground if you connect the Model 2611A or 2612A to the
Model 8010 through the Model 2600-TRIAX.
CAUTION
Do not convert triaxial cables to BNC cables. Using BNC cables will remove protection from
SourceMeter Instrument voltages and may result in instrument damage. You must use triaxial cables.
Figure 3: Model 8010 to Model 2611A or 2612A rear panel connections
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
SH
LO,SL
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERIAL NO.
SERVICE BY QUALIFIED PERSONNEL ONLY.
LO
Se
Cable assemblies
(7078-TRX)
&
LO
HI
LO
se
I
se
n
se HI
en
n
se
H
Connect
ground cable
(CA-568-120)
lugs to protective earth
S
H
I
LO
& sen
se
Interlock cable
(CA-558-2)
SENSE
LO
SENSE
HI
HI
!
- LO
WARNING
MAX. FLOATING VOLTAGE
LO TO CHASSIS: 42 Vpk
Adapter
(2600-TRIAX)
Adapter
(2600-TRIAX)
2600-TRIAX
WARNING:
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
CHANNEL A
CAT
S
LO LO G HI G
S G
HI
G
G HI G
CAT
!
!
G
S
G HI
S LO
LO
CHANNEL B
SERIAL NO.
!
RS-232
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
2-6
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
LAN
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 2: Connecting instruments to the Model 8010
Model 2635A and Model 2636A connections
The Model 8010 includes internal protection circuitry for the Model 2635A and 2636A SMUs. In the
case of a device under test (DUT) failure, this circuitry protects the SMUs from high voltage from the
Model 2657A.
CAUTION
Do not convert triaxial cables to BNC cables. Using BNC cables will remove protection from
SourceMeter Instrument voltages and may result in instrument damage. You must use triaxial cables.
Figure 4: Model 8010 to Model 2635A and Model 2636A rear panel connections
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
HI
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
LO,SL
SH
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
LO
2600A#2
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
L
O
S
an
d
HI
Sense HI
WARNING:
LO a
nd s
e
LO
nse
nse LO
se
HI
HI
se
en
Triaxial cables
(4200-TRX)
Connect
ground cable
(CA-568-120) lugs
to protective earth
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
LO
LO
HI
CHANNEL A
SENSE
HI
GUARD
GUARD
SENSE
HI
CHANNEL B
HI
LO
SENSE
LO
!
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
SERIAL NO.
RS-232
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
LAN
B LO
A LO
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
Interlock (CA-558-2)
8010-900-01 Rev. A / February 2012
2-7
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
Model 2651A connections
NOTE
There is no safety interlock on the Model 2651A — the safety interlock is not necessary because
output voltage of the Model 2651A is below hazardous levels. The CA-558-2 cable is shown here in
case you want to use Output Enable to shut off the output when the Model 8010 lid is opened. To
activate Output Enable, refer to the Model 2651A Reference Manual. Output Enable can be activated
using the front panel or by remote control.
Figure 5: Model 8010 to Model 2651A wiring diagram
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SH
HI
LO,SL
SH
HI
S
LO G
G
G
LO
S
G HI
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
INPUT
SENSE/GUARD
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
!
4200
INTERLOCK
1
26XXA
INTERLOCK
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
Interlock cable (CA-558-2)
5.0A, 250V
100-240VAC
50, 60Hz
550VA MAX.
RS-232
DIGITAL I/O
OUTPUT
SENSE/GUARD
IEEE-488
!
!
LAN
MADE IN
U.S.A.
AMP
TSP-Link
S
LO G
R
G
G
LO
S
G HI
HI
AMP
40V, 20A DC, 50A PULSE MAX.
123456789
2-8
LISTED
SourceMeter
4ZA4
NO INTERNAL OPERATOR SERVICEABLE PARTS,
CHANNEL A
REPLACE FUSE WITH SAME TYPE AND RATING.
!
WARNING: SERVICE BY QUALIFIED PERSONNEL ONLY.
LO and HI (2651A-KIT-1)
LINE FUSE
SLOWBLOW
LINE RATING
Sense and guard (CA-557-1)
Connect ground cable
(CA-568-120) lugs
to protective earth
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 2: Connecting instruments to the Model 8010
Model 2657A connections
Figure 6: Model 8010 to Model 2657A rear panel connections
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
LO
2651A#2
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
G
G
S
G HI
INPUT
LO
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
SH
HI
LO,SL
SH
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
26XXA
INTERLOCK
4200
INTERLOCK
!
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERIAL NO.
SERVICE BY QUALIFIED PERSONNEL ONLY.
Connect ground cable
(CA-568-120) lugs
to protective earth
LO and sense LO (CA-554)
HI (CA-554)
Sense HI (CA-554)
SERIAL NO.
LINE FUSE
SLOWBLOW
5.0A, 250V
LINE RATING
100-240VAC
50, 60Hz
350VA MAX.
RS-232
DIGITAL I/O
IEEE-488
!
LO
!
LAN
MADE IN
U.S.A.
AMP
TSP-Link
250 V
MAX.
R
SENSE
LO
LO
3030 VDC
MAX.
HI
GUARD
SENSE
HI
AMP
NO INTERNAL OPERATOR SERVICEABLE PARTS,
T SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
INPUT/OUTPUT CURRENT: 120mA MAX.
!
REPLACE FUSE WITH SAME TYPE AND RATING.
Interlock cable (CA-558-2)
8010-900-01 Rev. A / February 2012
2-9
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
Model 4200 and Model 4210-SMU connections
The Model 8010 includes internal protection circuitry for the Models 4200 and 4210-SMU. In the case
of a device under test (DUT) failure, this circuitry protects the SMUs from high voltage from the
Model 2657A.
NOTE
The LO terminal is connected to chassis ground once you connect the Model 4200 or 4210-SMU to
the Model 8010.
CAUTION
Do not convert triaxial cables to BNC cables. Using BNC cables will remove protection from
SourceMeter Instrument voltages and may result in instrument damage. You must use triaxial cables.
Figure 7: Model 8010 to Model 4200 and Model 4210-SMU wiring diagram
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
SENSE
HI
HI
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SH
HI
LO,SL
SH
HI
2600A#2
2600A#1
G
G
LO
S
G HI
HI
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERIAL NO.
4200-TRX
eL
S e ns O
R
200- M T
e HI (4
s
n
e
TRX)
HI (4200-M
LO
SERVICE BY QUALIFIED PERSONNEL ONLY.
X)
S
S
LO G
!
LO,SL
3280V, 120mA DC MAX.
!
INPUT
SENSE/GUARD
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
LO
Connect
ground cable
(CA-568-120)
lugs to
protective earth
Interlock
(236-ILC-3)
GNDU
COM1
LINE RATING LINE FUSE
50 / 60 HZ SLOW BLOW
1 KVA MAX
15A 250V
MC-1012
AC ONLY
LPT1
CE
S
E
N
S
E
INSTRUMENT
CONNECTIONS
SMU ONLY
SENSE LO
GUARD
F
O
R
C
E
SENSE LO
COMMON
SMU AND GNDU
C
O
M
M
O
N
SENSE
GUARD
COMMON
FORCE
28775 AURORA RD.
CLEVELAND, OH 44139
MADE IN
U.S.A.
SMU
9
4200
TM
SMU
8
SMU
7
SMU
6
SMU
5
SMU
4
SMU
3
SMU
2
SMU
1
4200
SMU
4200
SMU
SENSE LO
SENSE LO
INTLK
IN
SENSE
SENSE
FORCE
FORCE
PA CNTRL
PA CNTRL
!
!
OUT
!
2-10
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 2: Connecting instruments to the Model 8010
Model 4200 and Model 4210-SMU with preamplifier connections
The Model 8010 includes internal protection circuitry for the Models 4200 and 4210-SMU. In the case
of a device under test (DUT) failure, this circuitry protects the SMUs from high voltage from the
Model 2657A.
NOTE
The LO terminal is connected to chassis ground once you connect the Model 4200 or 4210-SMU to
the Model 8010.
CAUTION
Do not convert triaxial cables to BNC cables. Using BNC cables will remove protection from
SourceMeter Instrument voltages and may result in instrument damage. You must use triaxial cables.
Figure 8: Model 8010 to Model 4200 or Model 4210-SMU with preamplifier rear panel
connections
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
SENSE
HI
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
SH
LO,SL
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
LO
)
LO
e
ns
Se
RX
I (4200-T
Sense H
)
0-TRX
HI (420
Connect
ground cable
(CA-568-120) lugs
to protective earth
4200-TRX
GNDU
COM1
LINE RATING LINE FUSE
50 / 60 HZ SLOW BLOW
1 KVA MAX
15A 250V
MC-1012
AC ONLY
LPT1
CE
S
E
N
S
E
INSTRUMENT
CONNECTIONS
SMU ONLY
SENSE LO
GUARD
F
O
R
C
E
SENSE LO
COMMON
SMU AND GNDU
C
O
M
M
O
N
SENSE
GUARD
COMMON
FORCE
28775 AURORA RD.
CLEVELAND, OH 44139
MADE IN
U.S.A.
SMU
9
4200
TM
SMU
8
SMU
7
SMU
6
SMU
5
SMU
4
SMU
3
SMU
2
SMU
1
4200
SMU
4200
SMU
SENSE LO
SENSE LO
SENSE
SENSE
FORCE
FORCE
INTLK
IN
Remote preamplifier
(4200-PA)
SENSE
4200-PA REMOTE PREAMP
8010-900-01 Rev. A / February 2012
PA CNTRL
PA CNTRL
!
!
FORCE
!
PREAMP
CONTROL
!
!
OUT
2-11
Section 2: Connecting instruments to the Model 8010
Model 8010 High Power Device Test Fixture User's Manual
Internal protection circuitry
The Model 8010 includes internal protection circuitry that protects instruments in applications where a
device breakdown or other potential failure could connect the high-voltage output of a Model 2657A
high-voltage SMU to a lower voltage SMU.
The Model 8010 includes internal protection circuitry for the Models 2611A, 2612A, 2635A, 2636A,
4200, and 4210 SMUs. The protection circuitry is automatically connected whenever you make
connections between the Model 8010 and these SMUs.
CAUTION
Do not convert triaxial cables to BNC cables. Using BNC cables will remove protection from
SourceMeter Instrument voltages and may result in instrument damage. You must use triaxial cables.
Using the access port on the Model 8010
The rear panel of the lid of the Model 8010 contains an access port. This port can be used to bring in
connections for external instrumentation. For example, you could route oscilloscope probes through
the access port to the device under test or to the guard terminal of the instruments connected to the
Model 8010.
WARNING
Before removing the access port cover plate, make sure you remove all power sources to the
test fixture. Failure to disconnect power may result in personal injury or death due to electric
shock.
WARNING
Removal of the access port cover plate may expose the user to hazardous live voltages.
Always replace the access port cover plate after use. Failure to do so could expose the user to
hazardous voltages that could result in personal injury or death.
To use the access port:
1. Remove the access port cover plate.
2. Route external connections through the access port.
3. After testing is complete, replace the access port cover plate.
CAUTION
If you use the access port to route an oscilloscope probe, be sure to use a probe that is rated for the
maximum current or voltage expected in your test setup. Failure to do so can result in equipment
damage.
Quick Tip
If you wish to use the oscilloscope voltage probe to monitor the instrument output, connect the probe
to the Guard terminal to avoid loading the device under test.
2-12
8010-900-01 Rev. A / February 2012
Section 3
Working with devices and instruments
In this section:
Safety information .................................................................... 3-1
About the device test boards.................................................... 3-1
Installing a device in the axial posts ......................................... 3-2
Installing a device in the TO socket.......................................... 3-3
Using the insulating plug .......................................................... 3-3
Measurement considerations ................................................... 3-4
Using the guard terminal .......................................................... 3-8
Safety information
WARNING
Verify that all wiring is to the inside of the cross-hatched area of the test fixture. Ensure that
wires do not protrude beyond the fixture lid and that the lid will close securely. Exposed wire
may result in electric shock, causing death or serious injury.
Hazardous voltages may be present on the output and guard terminals. To prevent electrical
shock that could cause injury or death, never make or break connections to the Model 8010
while the output from the SourceMeter Instrument (SMU) is on. Power off the instrument from
the front panel or disconnect the main power cord from the rear of the instrument before
handling cables connected to the outputs. Putting the instrument into standby does not
guarantee that the outputs are powered off if a hardware or software fault occurs.
Remove power from any connected SourceMeter Instruments before making connections.
Make connections to the SourceMeter Instruments before making connections to the Model 8010.
About the device test boards
The 8010-DTB and 8010-DTB-220 Device Test Boards include sockets for three-terminal and
axial-lead devices. The connections available on the boards allow you to make 2-wire (local) or 4-wire
(remote) test connections.
The socket has true remote sense connections to each pin, with two binding posts connected to each
terminal of the device. One set of binding posts is intended for force connections and the other for
sense connections.
Section 3: Working with devices and instruments
Model 8010 High Power Device Test Fixture User's Manual
When making connections:
•
•
Connect force leads to binding posts 4, 5, and 6
Connect sense leads to binding posts 1, 2, and 3
These pins are connected internally to each other (binding post 1 to post 4, 2 to 5, and 3 to 6).
However, posts 4, 5, and 6 have a shorter path to the socket than posts 1, 2, and 3, which results in a
lower resistance path. This is particularly important for high-current applications.
When testing axial-lead devices, note that posts 1 and 3 put the sense leads closer to the device
under test. This reduces measurement error due to lead resistance.
3
6
Force
binding
posts
1
4
4
1
4
1
5
2
Sense
binding
posts
2
3
6
6
3
Figure 9: Force and sense binding posts
Two 8010-DTB high power socket module test boards are installed in the Model 8010. The Model
8010 is also shipped with an 8010-CTB Customizable Test Board, which allows you to add your own
connections.
In addition, you can purchase the 8010-DTB-220 Device Test Board for use with three-terminal
TO-220 or TO-247 devices. You can also purchase replacement 8010-DTB and 8010-CTB boards.
Installing a device in the axial posts
This section discusses how to install devices in the axial terminal posts on the 8010-DTB or 8010DTB-220 Device Test Board.
To install a device in the axial posts:
1. Insert the device in the axial posts.
2. Insert the insulating plug in the TO socket terminals if needed. See Using the insulating plug (on
page 3-3) for detail.
See Axial-lead device high current test (on page 5-1) for an example.
Figure 10: Model 8010-DTB and DTB-220 axial leads and TO socket
3
6
Three-pin TO socket
3-2
1
4
4
1
4
1
5
2
2
3
6
6
3
Axial terminal posts
Axial terminal posts
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 3: Working with devices and instruments
Installing a device in the TO socket
This section explains how to install a device in the TO socket of the 8010-DTB or 8010-DTB-220
board.
To install a device in the TO socket:
1. Remove the insulating plug (if used) from the three-pin socket.
2. Verify that the four axial terminal posts are not connected to anything.
3. Place the TO-220 or TO-247 device into the pins of the three-pin socket. If you are installing a
two-terminal device, place the device into the outer pins.
See Off-state characterization of a power MOSFET (on page 4-1) and On-state characterization of a
power MOSFET (on page 6-1) for examples.
NOTE
The two-terminal interconnection diagrams that are shown in the "Model 8010 Interconnection
Reference Guide" are intended for axial-lead devices. However, you can adapt the setups so that you
can test two-terminal TO-220 and TO-247 devices.
Using the insulating plug
The Model 8010 comes with insulating plugs. These plugs can be installed in the TO sockets of the
8010-DTB and 8010-DTB-220 boards when you are testing two-terminal devices that are installed in
the axial-lead terminal posts. In general:
•
•
You will use the insulating plug when measuring lower resistance devices.
Do not use the insulating plug when measuring devices with resistances greater than 1 MΩ.
The three-pin socket on the device test boards inherently shorts the force and sense pins together.
When you are using the axial terminal posts in 4-wire mode, this can cause measurement errors. You
should insert the insulating plug into the three-pin socket when testing devices with axial leads in 4wire sense mode where a short between force and sense will cause measurement errors.
Do not use the insulating plug when testing devices with higher resistance (greater than 1 MΩ). Using
the plug for these tests may cause leakage measurement errors.
8010-900-01 Rev. A / February 2012
3-3
Section 3: Working with devices and instruments
Model 8010 High Power Device Test Fixture User's Manual
Measurement considerations
The following topics describe some considerations you should be aware of when taking
measurements.
With the Model 8010, you can make measurements using either 2-wire (local) or 4-wire (remote)
sensing. Examples of each are shown in the "Model 8010 Interconnection Reference Guide."
The 2-wire sensing method requires only two test leads. However, as shown in the following figure,
test lead resistance can seriously affect the accuracy of 2-wire resistance measurements, particularly
when measuring lower resistance values.
Figure 11: 2-wire resistance sensing
SourceMeter Instrument
I
VM
VM
LO
Test current (I)
RLEAD
HI
Lead
resistances
VR
Rs
Resistance
under test
RLEAD
I = Current sourced
VM = Voltage measured
VR = Voltage across resistor
VM
= Rs + (2 × RLEAD)
Measured resistance =
I
VR
= Rs
Actual resistance =
I
3-4
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 3: Working with devices and instruments
The 4-wire sensing method, as shown in the following figure, minimizes or eliminates the effects of
lead resistance by measuring the voltage across the resistor under test with a second set of test
leads. Because of the high input impedance of the voltmeter, the current through the sense leads is
negligible, and the measured voltage is essentially the same as the voltage across the resistor under
test.
Figure 12: 4-wire resistance sensing
SourceMeter Instrument
I
HI
RLEAD
4-wire sense HI
RLEAD
VM
VM
Test current (I)
Sense current (pA)
Lead
resistances
4-wire sense LO
RLEAD
LO
RLEAD
VR
RS
Resistance
under test
I = Current sourced by SourceMeter
VM = Voltage measured by SourceMeter
VR = Voltage across resistor
Because sense current is negligible, VM = VR
V
V
and measured resistance = M = R = RS
I
I
NOTE
Four-wire remote sense is recommended when device resistances are low enough (less than 1kΩ)
that resistance in the test leads will cause significant error in the measurement. For more information,
in the Series 2600A or Model 2651A Reference Manual, see "DUT test connections" for information
on two-wire and four-wire sensing.
If you are using remote sense connections in the Model 8010, you must enable remote sense on the
instrument.
8010-900-01 Rev. A / February 2012
3-5
Section 3: Working with devices and instruments
Model 8010 High Power Device Test Fixture User's Manual
Suppressing device oscillations
During on-state characterization of MOSFET and IGBT devices, high-current pulses that travel
through the channel of the device may cause the gate of the device to oscillate. The instability of the
gate voltage will result in unstable measurements through the device channel.
To dampen these oscillations and stabilize the gate, you can insert a resistor between the gate of the
device and the SourceMeter Instrument (SMU) connected to the gate. See How to insert a resistor on
a device terminal (on page 3-6) for detail.
The appropriate gate resistor value is device-dependent. However, typical gate resistor values range
from tens to hundreds of ohms.
If the gate remains unstable after inserting a dampening resistor, enable the high-capacitance mode
(if available) on the SMU connected to the gate.
How to insert a resistor on a device terminal
The Model 8010 is equipped to connect a standard resistor with axial leads to any device terminal.
To connect a resistor to the Model 8010:
1. Loosen the screw-down clamp of the terminal post you wish to connect to.
2. Insert one lead of the resistor into the hole below the screw-down clamp.
3. Tighten the screw-down clamp until the resistor is held firmly to the terminal post.
4. Connect an alligator clip (customer-supplied) to the banana plug of the jumper wire coming from
the force lead of the SMU to be connected.
5. Clip the alligator clip to the other end of the resistor.
Figure 13: Model 8010 two-wire test with a gate resistor installed
!
2657A
2600A
#2
GUARD
LO
LO
HI
HI
SHI
SHI
3
6
5
SLO
LO
1
SLO
1
5
S
D
G
2
3
SLO
3
6
2
TO-247
2
1
GUARD
1
4
3
GUARD
CA-562-0
high-current
banana cable
HIGH VOLTAGE
6
6
3
4200/2600A
#1
!
6
SLO
LO
4200
GNDU
LO
GUARD
4
1
1
4
4
HI
4
CA-560-0
stacked at
terminal 3
SLO
6
HIGH CURRENT
3
!
2
2651A
SHI
CA-562-2
high-current
banana cable
CA-560-2
stack-up
banana cable
3-6
SHI
CA-563
BNC-tobanana cable
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 3: Working with devices and instruments
If you are using a four-wire configuration, the sense lead of the SMU will need to be connected to the
same side of the resistor as the source lead. To connect both the sense and source leads to the
same side of the resistor, stack the ends of the force and sense lead jumpers together, then connect
them to the customer-supplied alligator clip.
Figure 14: Four-wire remote sense with gate resistor
!
2657A
GUARD
6
2600A
#2
GUARD
LO
HI
HI
SHI
SHI
3
6
5
LO
2
SLO
LO
1
SLO
1
S
D
G
5
TO-247
2
3
6
3
SLO
1
4
2
1
HIGH VOLTAGE
4
1
4
1
4
4
HI
HI
8010-900-01 Rev. A / February 2012
6
3
3
GUARD
CA-562-0
high-current
banana cable
CA-562-2
high-current
banana cable
CA-560-2
stack-up
banana cable
4200/2600A
#1
!
6
SLO
LO
4200
GNDU
LO
GUARD
CA-560-0
stacked at
terminal 3
SLO
6
HIGH CURRENT
3
!
2
2651A
SHI
CA-563
BNC-tobanana cable
3-7
Section 3: Working with devices and instruments
Model 8010 High Power Device Test Fixture User's Manual
Using the guard terminal
WARNING
Never connect the guard terminal from any instrument to the LO terminal of any instrument in
the Model 8010 or to the chassis. Connecting guard to LO can disable the high voltage
protection that is installed across the Model 4200 or Model 2600A SourceMeter Instrument
connections. This may result in hazardous live voltages being present at the HI, SHI, SLO, or
LO terminals.
The guard terminal is useful for maintaining low-leakage measurements if you are using the
customized test board or if you are monitoring the test through the access port on the rear of the lid.
The driven guard is always enabled and provides a buffered voltage that is at the same level as the
HI (or sense HI for remote sense) voltage. This allows you to monitor the output of the SourceMeter
instrument (SMU) without disturbing the device under test. For example, you can monitor the SMU
with an oscilloscope probe routed through the access port of the Model 8010.
The purpose of guarding is to eliminate the effects of leakage current (and capacitance) that can exist
between high and low. In the absence of a driven guard, leakage in the external test circuit could be
high enough to adversely affect the performance of the SourceMeter Instrument.
Leakage current can occur through parasitic or nonparasitic leakage paths. An example of parasitic
resistance is the leakage path across the insulator in a coaxial or triaxial cable. An example of
nonparasitic resistance is the leakage path through a resistor that is connected in parallel to the
device under test (DUT).
Guard is typically used to drive the guard shields of cables and test fixtures. Guard is extended to a
test fixture from the cable guard shield. Inside the test fixture, the guard can be connected to a guard
plate or shield that surrounds the device under test (DUT). Note that the 8010-DTB and
8010-DTB-220 device test boards do not have guard plates or shields. However, you can use the
8010-CTB customizable test board to build custom connections that completely guard the
connections all the way to the device terminals.
WARNING
To prevent injury or death, a safety shield must be used to prevent physical contact with a
guard plate or guard shield that is at a hazardous potential (>30 V RMS or 42.4 V peak). This
safety shield must completely enclose the guard plate or shield and must be connected to
safety earth ground. The graphic below shows the metal case of a test fixture being used as a
safety shield. The lid of the Model 8010 serves as the safety shield.
3-8
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 3: Working with devices and instruments
The figures below show how a cable guard can eliminate leakage current through the insulators in a
test fixture. In these figures, leakage current (IL) flows through the insulators (RL1 and RL2) to LO,
adversely affecting the low-current (or high-resistance) measurement of the DUT.
Also in the figures below, the driven guard is connected to the cable shield and extended to the metal
guard plate for the insulators. Since the voltage on either end of RL1 is the same (0 Vdrop), no current
will flow through the leakage resistance path. Thus, the SourceMeter instrument only measures the
current through the DUT.
Note that the Model 8010 is a safety shield.
Figure 15: Unguarded measurements
Safety shield
Insulator
SourceMeter
IM = IDUT + IL
HI
DUT
RL1
I-meter
+
Insulator
IDUT
RL2
IL
Metal mounting plate
V-source
–
IM = Measured current
IDUT = DUT current
LO
IL
= Leakage current
Connect to protective earth
(safety ground) using
#18 AWG wire or larger
Figure 16: Guarded measurements
SourceMeter
x1
Guard
Cable shield
Safety shield
Insulator
IDUT
IM = IDUT
DUT
I-meter
+
IN/OUT
HI
0V
RL1
RL2
Metal mounting plate
V-source
–
IN/OUT
LO
Connect to protective earth
(safety ground) using
#18 AWG wire or larger
8010-900-01 Rev. A / February 2012
3-9
Section 4
Off-state characterization of a power MOSFET
In this section:
Introduction .............................................................................. 4-1
Equipment needed ................................................................... 4-2
Set up communication.............................................................. 4-2
Device connections .................................................................. 4-3
Install the device and make connections.................................. 4-6
BVdss measurement ................................................................ 4-6
Idss measurement.................................................................... 4-9
Introduction
This example characterizes the drain-to-source off-state performance of a power MOSFET in a
TO-247 package in the high-voltage side of the Model 8010.
It demonstrates how to program the Models 2657A and Series 2600A to perform BVdss and Idss
measurements. For a BVdss measurement, a test current is applied to the drain of the device while it is
in the off state and a voltage is measured that corresponds to the drain-to-source breakdown voltage.
For Idss measurements, a drain voltage (Vds) versus drain current (Id) curve is generated while
applying a gate voltage (Vgs) that ensures that the device is in the off state. The Model 2657A is used
to supply the drain voltage and make measurements of drain voltage and drain current. The Series
2600A is used to provide the gate voltage.
NOTE
You can also use this example to test an IGBT in a TO-247 package. You will need to make two
substitutions:
Substitute the collector terminal of the IGBT for the drain terminal of the FET
Substitute the emitter terminal of the IGBT for the source terminal of the FET
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Equipment needed
Equipment required:
•
One Model 8010 High Power Test Fixture with the Model 8010-DTB board installed on the high
voltage side of the test fixture (see Installing the test boards (on page 2-3) for more information)
•
•
•
•
•
•
•
One Model 2657A High Power System SourceMeter instrument
•
Cables to connect instruments to the device in the Model 8010: Two Model CA-563 and two
Model CA-560-0 cables
•
•
One GPIB cable or Ethernet cable
One Series 2600A System SourceMeter instrument
One power MOSFET in a TO-247 package
Cables to connect the Model 2657A to the Model 8010: Three Model CA-554 cable assemblies
Cables to connect the Series 2600A to the Model 8010: Three Model 7078-TRX cable assemblies
One CA-558-2 interlock cable
Model 2611A or 2612A only: Adapter to connect the SMU to the Model 8010: One Model 2600TRIAX triaxial adapter
One TSP-Link cable
Set up communication
The communication setup is illustrated in the following diagram. GPIB is used as an example, but this
application can be run using any of the supported communication interfaces for the instruments.
Figure 17: GPIB and TSP-Link communications setup
9
LIMIT
5
1
LOAD
2
RUN
PU
R
TE
N
8
MEAS
4
TO E DIT / E
7
SRC
DIGITS SPEED
NF
CONFIG
2657A HIGH POWER SYSTEM SourceMeter ®
N
SH
DISPLAY
T O ED IT /E
PU
SrcA:+3.00000kV LimA:1.00000mA
POWER
SH
R
+0.01000nA
TE
ARM
GPIB
+/MODE
6
0
REL
FILTER
3
0000
STORE RECALL
TPUT
OU
AUTO
CURSOR
LOCAL
TRIG
MENU
EXIT
ENTER
ON
/ OFF
Model 2657A (TSP-Link Node #1)
TSP-Link
Model 2611A, Model 2612A, Model 2635A,
or Model 2636A (TSP-Link Node #2)
4-2
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 4: Off-state characterization of a power MOSFET
Device connections
Connect instruments to the Model 8010
Refer to the appropriate figures below to connect your SourceMeter instrument to the Model 8010.
WARNING
The ground wires must be attached to a known protective earth (safety ground) before
powering on instruments. Failure to attach the ground wires to a known protective earth
(safety ground) may result in electric shock.
Figure 18: Model 8010 to Model 2611A or 2612A rear panel connections for MOSFET
application example
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
LO,SL
SH
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#2
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
LO
se HI
en
Connect
ground cable
(CA-568-120)
lugs to protective earth
S
HI
LO
& Sen
se
Cable assemblies
(7078-TRX)
Interlock cable
(CA-558-2)
Adapter
(2600-TRIAX)
WARNING:
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
CHANNEL A
CAT
S
LO LO G HI G
S G
HI
G
G HI G
CAT
!
!
G
S
G HI
S LO
LO
CHANNEL B
SERIAL NO.
!
RS-232
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
LAN
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
8010-900-01 Rev. A / February 2012
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
4-3
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Figure 19: Model 8010 to Model 2635A or 2636A rear panel connections for MOSFET
application example
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
LO,SL
SH
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
LO
2600A#2
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
Connect
ground cable
(CA-568-120) lugs
to protective earth
HI
WARNING:
LO
nse
Triaxial cables
(4200-TRX)
Sense HI
LO a
nd s
e
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
LO
LO
HI
CHANNEL A
SENSE
HI
GUARD
GUARD
SENSE
HI
CHANNEL B
HI
LO
SENSE
LO
!
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
SERIAL NO.
RS-232
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
LAN
B LO
A LO
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
Interlock (CA-558-2)
4-4
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 4: Off-state characterization of a power MOSFET
Figure 20: Model 8010 to Model 2657A rear panel connections
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
LO
2651A#2
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
G
G
S
G HI
INPUT
LO
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
SH
HI
LO,SL
SH
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
26XXA
INTERLOCK
4200
INTERLOCK
!
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERIAL NO.
SERVICE BY QUALIFIED PERSONNEL ONLY.
Connect ground cable
(CA-568-120) lugs
to protective earth
LO and sense LO (CA-554)
HI (CA-554)
Sense HI (CA-554)
SERIAL NO.
LINE FUSE
SLOWBLOW
5.0A, 250V
LINE RATING
100-240VAC
50, 60Hz
350VA MAX.
RS-232
DIGITAL I/O
IEEE-488
!
LO
!
LAN
MADE IN
U.S.A.
AMP
TSP-Link
250 V
MAX.
R
SENSE
LO
LO
3030 VDC
MAX.
HI
GUARD
SENSE
HI
AMP
NO INTERNAL OPERATOR SERVICEABLE PARTS,
T SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
INPUT/OUTPUT CURRENT: 120mA MAX.
!
REPLACE FUSE WITH SAME TYPE AND RATING.
Interlock cable (CA-558-2)
8010-900-01 Rev. A / February 2012
4-5
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Install the device and make connections
To install a device in the Model 8010 and connect instruments to the device:
1. Ensure that the Model 8010-DTB test board is installed. Refer to Installing the test boards (on
page 2-3).
2. Remove the insulating plug if installed.
3. Install the device in the socket so that the gate terminal is connected to pins 1 and 4 of the device
test board.
4. Make the connections as shown in the graphic below.
Figure 21: Three-terminal DUT with a Model 2657A and a Series 2600A connected (local sense)
SLO
2657A
2600A
#2
GUARD
GUARD
HI
HI
SHI
SHI
1
4
5
LO
2
TO-247
LO
S
D
G
LO
CA-560-0
stacked at
terminal 6
1
4
SLO
1
SLO
3
6
3
SLO
3
6
5
2
2
3
GUARD
1
HIGH VOLTAGE
6
6
3
4200/2600A
#1
6
SLO
!
!
LO
GUARD
LO
4200
GNDU
6
HIGH CURRENT
3
!
2
2651A
SHI
4
1
4
HI
1
4
4
HI
SHI
CA-563
BNC-tobanana cable
BVdss measurement
NOTE
The example code is designed to be run from Test Script Builder or TSB Embedded. It can also be
run from other programming environments, such as Microsoft® Visual Studio® or National Instruments
LabVIEWTM. However, you may need to make changes to the example code to use other
programming environments.
This example performs the BVdss measurement. The Model 2657A forces a current from the drain to
source terminals and measures the resulting Vds. This example uses a TSP script to perform the
measurement. The script includes two separate functions for configuring the System SourceMeter
Instrument and returning the raw current and voltage readings from the reading buffer.
The script is written using Test Script Processor (TSP) functions rather than as a single block of inline
code. TSP functions are similar to functions in other programming languages, such as Microsoft®
Visual C® or Visual Basic®. They must be called before the code in them is executed. Because of this,
running the script alone will not execute the test. To execute the test, you need to run the script to
load the functions into test script memory. You then call the functions.
Refer to the documentation for Test Script Builder or TSB Embedded for directions on how to run
scripts and enter commands using the instrument console.
4-6
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 4: Off-state characterization of a power MOSFET
Example program code
--[[
Title: FET Drain-Source Breakdown Voltage
Description: This script measures the drain-source
breakdown voltage (BVdss) of a FET.
--]]
--[[
BVdss(gateV, drainI, measDelay, igLimit, vdLimit, numNPLC)
Description: This function uses the Model 2657A to force a current
from drain to source. The SMU also measures the resulting voltage (Vds)
with the FET channel turned off. A second System SourceMeter Instrument
applies the gate to source voltage (Vgs) to ensure that the gate is
turned off.
Parameters:
gateV: Applied gate voltage (Vgs).
drainI: Test current applied by the Model 2657A from
drain to source (Id).
measDelay: Measurement delay before making the drain voltage
measurement (Vgs).
igLimit: Current limit (compliance) for the SMU connected to the
FET gate terminal.
vdLimit: Voltage limit (compliance) for the SMU connected to the
FET drain terminal.
numNPLC: Integration time for the drain voltage measurement
(in number of power line cycles).
Example usage:
BVdss(0, 0.001, 0.01, 0.01, 2000, 1)
--]]
function BVdss(gateV, drainI, measDelay, igLimit, vdLimit, numNPLC)
--Initialize SMU.
reset()
errorqueue.clear()
status.reset()
tsplink.reset()
--Configure source function.
node[2].smua.source.func = node[2].smua.OUTPUT_DCVOLTS
node[2].smua.source.levelv = gateV
node[2].smua.source.limiti = igLimit
smua.source.func =
smua.source.rangei
smua.source.leveli
smua.source.limitv
8010-900-01 Rev. A / February 2012
smua.OUTPUT_DCAMPS
= drainI
= drainI
= vdLimit
4-7
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
--Configure measurement parameters.
smua.measure.rangev = vdLimit
smua.measure.nplc = numNPLC
smua.measure.delay = measDelay
--Run the test.
node[2].smua.source.output = 1
smua.source.output = 1
I,V = smua.measure.iv()
smua.source.output = 0
node[2].smua.source.output = 0
print("Test current:", I)
print("Measured voltage:", V)
end
Example program usage
The function in this script allows updates to the test parameters without rewriting or re-running the
script. To run the test, call the BVdss() function, passing in the appropriate values for test
parameters.
BVdss() parameters
Parameter
Units
Description
gateV
volts
drainI
measDelay
amps
seconds
igLimit
amps
vdLimit
volts
numNPLC
not applicable
Gate voltage to apply with Series 2600A System
SourceMeter Instrument
Drain current forced by Model 2657A
Measurement delay after applying drain current and before
measuring BVdss
Current limit for the Series 2600A SourceMeter Instrument
connected to the MOSFET gate terminal
Voltage limit (compliance) for the Model 2657A connected to
the MOSFET drain terminal; should be greater than or equal
to the expected BVdss value
Integration time, specified as the number of power line
cycles
An example of how to call this function is shown here:
BVdss(0, 0.001, 0.01, 0.01, 2000, 1)
This call applies 0 V to the FET gate terminal and programs the Model 2657A to force 1 mA into the
drain terminal. After 10 ms, the drain voltage is measured (up to 2000 V max). The measurement is
made at 1 PLC. The actual drain current is also measured. The measurement results are
automatically printed at the completion of the test. An example of the measurements results is:
Test current:
9.99856e-04
Measured voltage:
1.76940e+03
4-8
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 4: Off-state characterization of a power MOSFET
Idss measurement
This example:
•
Performs the Idss measurement, where the drain-to-source voltage (Vds) is swept and leakage
current measurements are made while the FET is in the off-state.
•
Monitors the current measurement to see if the current limit has been reached. When the current
limit has been reached, the voltage sweep is aborted.
With this method, a second System SourceMeter is used to apply a voltage from gate to source (Vgs).
This example uses a TSP script to perform the measurement. The script includes two separate
functions for configuring the System SourceMeter Instruments and returning the raw current and
voltage readings from the reading buffer.
Example program code
--[[
Title: FET Drain-to-Source Leakage Current Measurement Sweep
Description: This script measures the drain current while the
drain voltage is sweeping linearly and under a 0 V gate bias.
--]]
--[[
Idss(gateV, startV, stopV, numSteps, measDelay, measRange, iLimit, numNPLC)
Description: This function uses the Model 2657A to sweep the voltage
across the drain up to the drain-source breakdown voltage and measure
the drain current. A second SourceMeter instrument is used to bias the
gate. For enhancement-mode power MOSFETs, a typical gate bias is 0 V.
Parameters:
gateV: Applied gate voltage bias (Vgs).
startV: Starting drain voltage (Vds).
stopV: Final drain voltage (Vds).
numSteps: Number of points in the drain voltage sweep.
measDelay: Measurement delay.
measRange: Current measurement range for the drain current measurements.
iLimit: Current limit (compliance) for the drain current.
numNPLC: Integration time in the number of power line cycles.
Example Usage:
Idss(0, 10, 1760, 500, 0.05, 100e-9, 500e-6, 1)
--]]
8010-900-01 Rev. A / February 2012
4-9
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
function Idss(gateV, startV, stopV, numSteps, measDelay, measRange, iLimit,
numNPLC)
--Initialize SMU.
reset()
errorqueue.clear()
status.reset()
--Configure reading buffers.
smua.nvbuffer1.clear()
smua.nvbuffer1.appendmode = 1
smua.nvbuffer1.collecttimestamps = 1
smua.nvbuffer2.clear()
smua.nvbuffer2.appendmode = 1
smua.nvbuffer2.collecttimestamps = 1
--Configure source parameters for the gate SMU.
node[2].smua.source.func = node[2].smua.OUTPUT_DCVOLTS
node[2].smua.source.levelv = gateV
node[2].smua.source.limiti = 0.001
--Configure source parameters for the drain SMU.
smua.source.func = smua.OUTPUT_DCVOLTS
smua.source.levelv = 0
smua.source.limiti = iLimit
if math.abs(startV) > math.abs(stopV) then
smua.source.rangev = startV
else
smua.source.rangev = stopV
end
--Configure measurement parameters for the drain SMU.
smua.measure.rangei = measRange
smua.measure.nplc
= numNPLC
smua.measure.delay = measDelay
step = (stopV - startV)/(numSteps - 1)
voltage = startV
smua.source.levelv = voltage
4-10
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 4: Off-state characterization of a power MOSFET
--Run the test.
node[2].smua.source.output = 1
smua.source.output = 1
delay(1)
for i = 1, numSteps do
smua.measure.iv(smua.nvbuffer1, smua.nvbuffer2);
--Remove the following 4 lines if you do not want to monitor
--for compliance
testCmpl = smua.source.compliance
if testCmpl == true then
break
end
smua.source.levelv = voltage + step
voltage = voltage + step
end
--Turn off the SMUs to complete the test.
smua.source.levelv = 0
node[2].smua.source.levelv = 0
node[2].smua.source.output = 0
smua.source.output = 0
printData()
end
function printData()
if
smua.nvbuffer1.n == 0 then
print("No reading in buffer")
else
print("Timestamps\tVoltage\tCurrent")
for i = 1, smua.nvbuffer1.n do
print(string.format("%g\t%g\t%g", smua.nvbuffer1.timestamps[i],
smua.nvbuffer2.readings[i], smua.nvbuffer1.readings[i]))
end
end
end
8010-900-01 Rev. A / February 2012
4-11
Section 4: Off-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Example program usage
The functions in this script allow updates to the test parameters without rewriting or re-running the
script. To run the test, call the Idss() function, passing in the appropriate values for test parameters.
Idss() parameters
Parameter
Units
Description
gateV
startV
stopV
volts
volts
volts
Gate voltage to apply with Series 2600A System SourceMeter Instrument
Start voltage for the drain voltage sweep
Final voltage for the drain voltage sweep
numSteps
measDelay
not applicable
seconds
measRange
amps
Number of voltage steps to perform in the voltage sweep
Measurement delay after applying drain voltage and before measuring
drain leakage current
Fixed current measurement range used to measure drain leakage current
iLimit
amps
numNPLC
not applicable
Current limit (compliance) for the Model 2657A connected to the MOSFET
drain terminal
Integration time, specified as the number of power line cycles
An example of how to call this function is shown here:
Idss(0, 10, 1760, 500, 0.05, 100e-9, 500e-6, 1)
This call applies 0 V to the MOSFET gate terminal and programs the Model 2657A to generate a 500
point voltage sweep from 0 V to 1760 V at the drain terminal. After each voltage step, a 50 ms delay
occurs before the current is measured. The measurement is made at 1 PLC. The measurements are
stored in the instrument's reading buffers and are output from the communication interface
immediately after the test is run.
Example output data is shown in the following graphic.
Figure 22: Example output data
4-12
8010-900-01 Rev. A / February 2012
Section 5
Axial-lead device high current test
In this section:
Introduction .............................................................................. 5-1
Equipment needed ................................................................... 5-1
Connect the instrument to the Model 8010............................... 5-2
Install the device and make connections.................................. 5-3
Set up communication.............................................................. 5-3
Example program code ............................................................ 5-4
Example program usage .......................................................... 5-9
Introduction
In this example, you will generate high speed current and voltage waveforms for a device with axial
leads that is installed on the high current side of the Model 8010. This example illustrates how to
connect to the device. It also demonstrates how to program the Model 2651A to output a pulse and
generate high-speed current and voltage waveforms.
Equipment needed
Equipment required:
•
One Model 8010 High Power Test Fixture with the Model 8010-DTB or Model 8010-DTB-220
board installed on the high current side of the test fixture (see Installing the test boards (on page
2-3) for more information)
•
•
•
One Model 2651A High Power System SourceMeter instrument
•
Cables to connect instruments to the device in the Model 8010: One Model CA-560-0, one Model
CA-562-0, one Model CA-562-2, and one Model 560-2 cable
•
One GPIB cable or Ethernet cable
One device with axial leads, such as a resistor or diode
Cables to connect the Model 2651A to the Model 8010: One Model 2651A-KIT-1, one Model
CA-557-1
Section 5: Axial-lead device high current test
Model 8010 High Power Device Test Fixture User's Manual
Connect the instrument to the Model 8010
Connect the Model 8010 to the Model 2651A as shown in the graphic below.
NOTE
This example does not use the interlock, although the connections for the interlock are shown in the
following graphic. If you want to use the test fixture interlock and output enable, see the Model 2651A
Reference Manual and the section "Using output enable."
Figure 23: Model 8010 to Model 2651A wiring diagram
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
SENSE
HI
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SH
HI
LO,SL
SH
HI
S
LO G
G
G
LO
S
G HI
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
INPUT
SENSE/GUARD
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
!
4200
INTERLOCK
1
26XXA
INTERLOCK
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
Interlock cable (CA-558-2)
5.0A, 250V
100-240VAC
50, 60Hz
550VA MAX.
RS-232
DIGITAL I/O
OUTPUT
SENSE/GUARD
IEEE-488
!
!
LAN
MADE IN
U.S.A.
AMP
TSP-Link
S
LO G
R
G
G
LO
S
G HI
HI
AMP
40V, 20A DC, 50A PULSE MAX.
123456789
5-2
LISTED
SourceMeter
4ZA4
NO INTERNAL OPERATOR SERVICEABLE PARTS,
CHANNEL A
REPLACE FUSE WITH SAME TYPE AND RATING.
!
WARNING: SERVICE BY QUALIFIED PERSONNEL ONLY.
LO and HI (2651A-KIT-1)
LINE FUSE
SLOWBLOW
LINE RATING
Sense and guard (CA-557-1)
Connect ground cable
(CA-568-120) lugs
to protective earth
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 5: Axial-lead device high current test
Install the device and make connections
To install a device in the Model 8010 and connect instruments to the device:
1. Ensure that the Model 8010-DTB or Model 8010-DTB-220 device test board is installed. Refer to
Installing the test boards (on page 2-3) for information on installing the device test boards.
2. Install the device in the axial posts.
3. Insert the insulating plug in the 3-terminal socket. Refer to Using the insulating plug (on page 3-3)
for more detail.
4. Make the connections as shown in the graphic below.
Figure 24: Two-terminal axial DUT with a Model 2651A connected (remote sense)
6
GUARD
LO
HI
HI
SHI
SHI
3
6
5
LO
2
SLO
LO
1
4
1
4
1
5
SLO
2
3
6
2
DUT
1
2
GUARD
SLO
3
GUARD
LO
2657A
2600A
#2
4200/2600A
#1
HIGH VOLTAGE
6
SLO
6
3
GUARD
!
!
4
1
4
HI
4
HI
4
CA-560-2
stack-up
banana cable
4200
GNDU
LO
1
CA-562-2
high-current
banana cable
SLO
HIGH CURRENT
3
!
3
CA-562-0
high-current
banana cable
2651A
6
CA-560-0
stack-up
banana cable
SHI
SHI
Set up communication
The communication setup is illustrated in the following figure. GPIB is used as an example, but this
application can be run using any of the supported communication interfaces for the instrument.
Figure 25: GPIB communication example
PU
TO E DIT / E
2657A HIGH POWER SYSTEM SourceMeter ®
N
N
1
5
2
RUN
9
LIMIT
TO E D IT / E
8
MEAS
4
LOAD
SH
7
SRC
DIGITS SPEED
CONFIG
PU
TE
R
R
SPLAY
DISPLAY
POWER
8010-900-01 Rev. A / February 2012
SH
TE
GPIB
+/MODE
6
0
REL
FILTER
3
0000
STORE RECALL
AUTO
OU
TPUT
ON
/ OFF
CURSOR
LOCAL
TRIG
MENU
EXIT
ENTER
5-3
Section 5: Axial-lead device high current test
Model 8010 High Power Device Test Fixture User's Manual
Example program code
NOTE
The example code is designed to be run from Test Script Builder or TSB Embedded. It can also be
run from other programming environments, such as Microsoft® Visual Studio® or National Instruments
LabVIEWTM. However, you may need to make changes to the example code to use other
programming environments.
The following script contains all the code necessary to output and capture a current or voltage pulse
using the Model 2561A fast ADC. The script sets up the source-measure unit (SMU), configures the
trigger model, prepares the reading buffers, executes the test, and outputs the collected data in a
format that can be copied and pasted from the instrument console to a Microsoft® Excel®
spreadsheet.
The script is written using Test Script Processor (TSP) functions rather than as a single block of inline
code. TSP functions are similar to functions in other programming languages, such as Microsoft®
Visual C® or Visual Basic®. They must be called before the code in them is executed. Because of this,
running the script alone will not execute the test. To execute the test, you need to run the script to
load the functions into test script memory. You then call the functions.
Refer to the documentation for Test Script Builder or TSB Embedded for directions on how to run
scripts and enter commands using the instrument console.
The script contains comments that describe what is being performed by the lines of code and
documentation for the functions in the script.
--[[
Title: Fast ADC Usage
Description: This script is designed to output pulses and capture
both the current and the voltage of the pulse using the fast ADC of
the Model 2651A High Power System SourceMeter instrument.
Equipment Needed:
1x 2651A
]]
--[[
Name:
CapturePulseV(pulseLevel, pulseWidth, pulseLimit, numPulses)
Description:
This function outputs voltage pulses with a 1% duty cycle and
performs measurements using the fast ADC to capture each pulse in
its entirety. At the conclusion of the pulse train, the data is
returned to the instrument console in a Microsoft Excel compatible
format.
Parameters:
pulseLevel:
pulseWidth:
pulseLimit:
numPulses:
The voltage level of the pulse in volts
The width of the pulse in seconds
100e-6 <= pulseWidth <= 4e-3
The current limit of the pulse in amps
The number of pulses to output
Example Usage:
CapturePulseV(5, 300e-6, 50, 5)
]]
5-4
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 5: Axial-lead device high current test
function CapturePulseV(pulseLevel, pulseWidth, pulseLimit, numPulses)
if (numPulses == nil) then numPulses = 1 end
-- Configure the SMU
reset()
smua.reset()
smua.source.func
smua.sense
smua.source.rangev
smua.source.levelv
smua.source.limiti
=
=
=
=
=
smua.OUTPUT_DCVOLTS
smua.SENSE_REMOTE
pulseLevel
0
-- The bias level
5
-- The DC limit
-- Use a measure range that is as large as the biggest
-- possible pulse
smua.measure.rangei
= pulseLimit
smua.measure.rangev
= pulseLevel
-- Select the fast ADC for measurements
smua.measure.adc
= smua.ADC_FAST
-- Set the measure count to be 1.25 times the width of the pulse
-- to ensure we capture the entire pulse plus falling edge
smua.measure.interval = 1e-6
smua.measure.count
= (pulseWidth / smua.measure.interval) * 1.25
-- Prepare the reading buffers
smua.nvbuffer1.clear()
smua.nvbuffer1.collecttimestamps
=
smua.nvbuffer1.collectsourcevalues
=
smua.nvbuffer1.fillmode
=
smua.nvbuffer2.clear()
smua.nvbuffer2.collecttimestamps
=
smua.nvbuffer2.collectsourcevalues
=
smua.nvbuffer2.fillmode
=
-- Cannot use source values with async
1
0
smua.FILL_ONCE
1
0
smua.FILL_ONCE
measurements
-- Configure the Pulsed Sweep setup
------------------------------------ Timer 1 controls the pulse period
trigger.timer[1].count
= numPulses - 1
-- -- 1% Duty Cycle
trigger.timer[1].delay
= pulseWidth / 0.01
trigger.timer[1].passthrough
= true
trigger.timer[1].stimulus
= smua.trigger.ARMED_EVENT_ID
-- Timer 2 controls the pulse width
trigger.timer[2].count
= 1
trigger.timer[2].delay
= pulseWidth - 3e-6
trigger.timer[2].passthrough
= false
trigger.timer[2].stimulus
= smua.trigger.SOURCE_COMPLETE_EVENT_ID
8010-900-01 Rev. A / February 2012
5-5
Section 5: Axial-lead device high current test
Model 8010 High Power Device Test Fixture User's Manual
-- Configure SMU Trigger Model for Sweep/Pulse Output
------------------------------------------------------ Pulses will all be the same level so set start and stop to
-- the same value and the number of points in the sweep to 2
smua.trigger.source.linearv(pulseLevel, pulseLevel, 2)
smua.trigger.source.limiti
= pulseLimit
smua.trigger.measure.action
= smua.ASYNC
-- We want to start the measurements before the source action takes
-- place, so we must configure the ADC to operate asynchronously of
-- the rest of the SMU trigger model actions
-- Measure I and V during the pulse
smua.trigger.measure.iv(smua.nvbuffer1, smua.nvbuffer2)
-- Return the output to the bias level at the end of the pulse/sweep
smua.trigger.endpulse.action
= smua.SOURCE_IDLE
smua.trigger.endsweep.action
= smua.SOURCE_IDLE
smua.trigger.count
= numPulses
smua.trigger.arm.stimulus
= 0
smua.trigger.source.stimulus
= trigger.timer[1].EVENT_ID
smua.trigger.measure.stimulus
= trigger.timer[1].EVENT_ID
smua.trigger.endpulse.stimulus = trigger.timer[2].EVENT_ID
smua.trigger.source.action
= smua.ENABLE
smua.source.output
smua.trigger.initiate()
waitcomplete()
smua.source.output
= smua.OUTPUT_ON
= smua.OUTPUT_OFF
PrintPulseData()
end
--[[
Name:
CapturePulseI(pulseLevel, pulseWidth, pulseLimit,
numPulses)
Description:
This function outputs current pulses with a 1% duty cycle and performs
measurements using the fast ADC to capture each pulse in its entirety.
At the conclusion of the pulse train, the data is returned to the
instrument console in a Microsoft Excel compatible format.
Parameters:
pulseLevel:
pulseWidth:
pulseLimit:
numPulses:
The current level of the pulse in amps
The width of the pulse in seconds
100e-6 <= pulseWidth <= 4e-3
The voltage limit of the pulse in volts
The number of pulses to output
Example Usage:
CapturePulseI(50, 300e-6, 10, 5)
]]
function CapturePulseI(pulseLevel, pulseWidth, pulseLimit, numPulses)
if (numPulses == nil) then
numPulses = 1
end
5-6
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 5: Axial-lead device high current test
-- Configure the SMU
reset()
smua.reset()
smua.source.func
= smua.OUTPUT_DCAMPS
smua.sense
= smua.SENSE_REMOTE
smua.source.rangei
= pulseLevel
smua.source.leveli
= 0
-- The bias level
smua.source.limitv
= 10
-- The DC limit
-- Use a measure range that is as large as the biggest possible pulse.
smua.measure.rangev
= pulseLimit
smua.measure.rangei
= pulseLevel
-- Select the fast ADC for measurements
smua.measure.adc
= smua.ADC_FAST
-- Set the measure count to be 1.25 times the width of the pulse
-- to ensure we capture the entire pulse plus falling edge
smua.measure.count
= (pulseWidth / smua.measure.interval) * 1.25
-- Prepare the reading buffers
smua.nvbuffer1.clear()
smua.nvbuffer1.collecttimestamps
=
smua.nvbuffer1.collectsourcevalues
=
smua.nvbuffer1.fillmode
=
smua.nvbuffer2.clear()
smua.nvbuffer2.collecttimestamps
=
smua.nvbuffer2.collectsourcevalues
=
smua.nvbuffer2.fillmode
=
-- Cannot use source values with async
1
0
smua.FILL_ONCE
1
0
smua.FILL_ONCE
measurements
-- Configure the Pulsed Sweep setup
------------------------------------ Timer 1 controls the pulse period
trigger.timer[1].count
= numPulses - 1
-- 1% Duty Cycle
trigger.timer[1].delay
= pulseWidth / 0.01
trigger.timer[1].passthrough
= true
trigger.timer[1].stimulus
= smua.trigger.ARMED_EVENT_ID
-- Timer 2 controls the pulse width
trigger.timer[2].count
= 1
trigger.timer[2].delay
= pulseWidth - 3e-6
trigger.timer[2].passthrough
= false
trigger.timer[2].stimulus
= smua.trigger.SOURCE_COMPLETE_EVENT_ID
8010-900-01 Rev. A / February 2012
5-7
Section 5: Axial-lead device high current test
Model 8010 High Power Device Test Fixture User's Manual
-- Configure SMU Trigger Model for Sweep/Pulse Output
------------------------------------------------------ Pulses will all be the same level so set start and stop to
-- the same value and the number of points in the sweep to 2
smua.trigger.source.lineari(pulseLevel, pulseLevel, 2)
smua.trigger.source.limitv
= pulseLimit
smua.trigger.measure.action
= smua.ASYNC
-- We want to start the measurements before the source action takes
-- place, so we must configure the ADC to operate asynchronously of
-- the rest of the SMU trigger model actions
-- Measure I and V during the pulse
smua.trigger.measure.iv(smua.nvbuffer1, smua.nvbuffer2)
-- Return the output to the bias level at the end of the pulse
smua.trigger.endpulse.action
= smua.SOURCE_IDLE
smua.trigger.endsweep.action
= smua.SOURCE_IDLE
smua.trigger.count
= numPulses
smua.trigger.arm.stimulus
= 0
smua.trigger.source.stimulus
= trigger.timer[1].EVENT_ID
smua.trigger.measure.stimulus
= trigger.timer[1].EVENT_ID
smua.trigger.endpulse.stimulus = trigger.timer[2].EVENT_ID
smua.trigger.source.action
= smua.ENABLE
smua.source.output
smua.trigger.initiate()
waitcomplete()
smua.source.output
= smua.OUTPUT_ON
= smua.OUTPUT_OFF
PrintPulseData()
end
--[[
Name:
PrintPulseData()
Description:
This function prints the data contained in smua.nvbuffer1 and
smua.nvbuffer2 in a format that is copy and paste compatible with
Microsoft Excel.
]]
function PrintPulseData()
print("Timestamp\tVoltage\tCurrent")
for i=1, smua.nvbuffer1.n do
print(string.format("%g\t%g\t%g", smua.nvbuffer1.timestamps[i],
smua.nvbuffer2[i], smua.nvbuffer1[i]))
end
end
5-8
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 5: Axial-lead device high current test
Example program usage
The functions in this script allow the parameters of the test to be adjusted without rewriting and
rerunning the script. To execute the test, either call CapturePulseV() to capture a voltage pulse or
CapturePulseI() to a capture current pulse, passing in the appropriate values as parameters.
Both of these functions capture both current and voltage. The difference between the functions is
what they are sourcing — one sources voltage, and the other sources current.
The parameters of the CapturePulseV() function are described in the following table:
CapturePulseV() parameters
Parameter
Units
Description
pulseLevel
Volts
The voltage level of the pulse
pulseWidth
pulseLimit
numPulses
Seconds
Amperes
Not applicable
The width of the pulse
The current limit of the pulses to output
The number of pulses to output
An example call to this function is as follows:
CapturePulseV(10, 300e-6, 50, 5)
This call will output five 10 V pulses with a 300 μs pulse width. The pulses will be limited to 50 A and
have a 1 percent duty cycle. At the completion of the pulsed outputs, the source-measure unit (SMU)
output is turned off. The resulting data from this test will be returned in a Microsoft® Excel® compatible
format (you can cut and paste the output from the console) that can be used for graphing and
analysis.
The parameters of the CapturePulseI() function are contained in the following table:
CapturePulseI() parameters
Parameter
pulseLevel
pulseWidth
pulseLimit
numPulses
Units
Description
Amperes
Seconds
Volts
Not applicable
The current level of the pulse
The width of the pulse
The voltage limit of the pulses to output
The number of pulses to output
An example call to this function is as follows:
CapturePulseI(50, 300e-6, 10, 5)
This call will output five 50 A pulses with a 300 μs pulse width. The pulses will be limited to 10 V and
have a 1% duty cycle. At the completion of the pulsed outputs, the SMU output is turned off. The
resulting data from this test will be returned in a Microsoft® Excel® compatible format (you can cut and
paste the output from the console) that can be used for graphing and analysis.
8010-900-01 Rev. A / February 2012
5-9
Section 5: Axial-lead device high current test
Model 8010 High Power Device Test Fixture User's Manual
Another example call to this function is as follows:
CapturePulseI(20, 1e-3, 10, 1)
This call will output one 20 A pulse with a 1 ms pulse width. The pulse will be limited to 10 V and have
a 1% duty cycle. At the completion of the pulsed output, the SMU output is turned off. The resulting
data from this test will be returned in a Microsoft® Excel® compatible format (you can cut and paste
the output from the console) that can be used for graphing and analysis.
This data was generated with a 100 mΩ load.
Figure 26: Axial device test results
5-10
8010-900-01 Rev. A / February 2012
Section 6
On-state characterization of a power MOSFET
In this section:
Introduction .............................................................................. 6-1
Equipment required for this example........................................ 6-2
Connect instruments to the Model 8010................................... 6-2
Install the device and make connections.................................. 6-6
Suppressing device oscillations (optional)................................ 6-7
Set up communication.............................................................. 6-8
Example program code ............................................................ 6-9
Example program usage ........................................................ 6-16
Introduction
This example illustrates how to connect to a MOSFET in a TO-247 package on the high current side
of the Model 8010. It demonstrates how to program the two Model 2651A SourceMeter instruments
and a Series 2600A instrument to measure the on resistance (Rds(On)) of a power MOSFET and
generate Rds(On) compared to drain current (Id) curve for a fixed gate voltage.
The two Model 2651A instruments are used to supply the drain current and take measurements of
drain voltage and drain current. The Series 2600A instrument is used to provide the gate voltage.
This example also provides detail on how to connect a resistor in series with the gate to suppress
possible device oscillations.
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Equipment required for this example
Equipment needed:
•
One Model 8010 High Power Test Fixture with the Model 8010-DTB or Model 8010-DTB-220
board installed on the high current side of the test fixture (see Installing the test boards (on page
2-3) for more information)
•
•
•
•
Two Model 2651A High Power System SourceMeter instruments
•
•
Cables to connect the Series 2600A to the Model 8010: Three Model 7078-TRX cable assemblies
•
Cables to connect instruments to the device in the Model 8010: One Model CA-562-2, one
Model CA-562-0, three Model CA-560-0, one Model CA-560-2, and two Model 563 cables
•
•
•
One CA-558-2 interlock cable
One Series 2600A System SourceMeter instrument
One power MOSFET in a TO-247 package
Cables to connect the two Model 2651A instruments to the Model 8010: Two Model 2651A-KIT-1
and two Model CA-557-1 cable assemblies
Adapter to connect the Series 2600A to the Model 8010: One Model 2600-TRIAX adapter for
Models 2611A and 2612A
One GPIB cable or Ethernet cable
Two TSP-Link cables
Connect instruments to the Model 8010
Make connections between the Model 8010 and the SourceMeter Instruments as shown in the
graphics below. Use the following graphic that is appropriate for your instrument.
WARNING
The ground wires must be attached to a known protective earth (safety ground) before
powering on instruments. Failure to attach the ground wires to a known protective earth
(safety ground) may result in electric shock.
6-2
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
Figure 27: Model 8010 to Model 2611A or 2612A rear panel connections for MOSFET
application example
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
LO
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
LO,SL
SH
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
2600A#2
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
LO
se HI
en
Connect
ground cable
(CA-568-120)
lugs to protective earth
S
HI
LO
& Sen
se
Cable assemblies
(7078-TRX)
Interlock cable
(CA-558-2)
Adapter
(2600-TRIAX)
WARNING:
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
CHANNEL A
CAT
S
LO LO G HI G
S G
HI
G
G HI G
CAT
!
!
G
S
G HI
S LO
LO
CHANNEL B
SERIAL NO.
!
RS-232
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
LAN
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
8010-900-01 Rev. A / February 2012
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
6-3
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Figure 28: Model 8010 to Model 2635A or 2636A rear panel connections for MOSFET
application example
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
LO
GUARD
30V
MAX.
SENSE
HI
210V, 1.5A DC MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
30V
MAX.
HI
2651A#2
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
SENSE/GUARD
HI
S
LO G
SH
HI
LO,SL
SH
HI
G
S
G HI
INPUT
LO
HI
!
LO,SL
3280V, 120mA DC MAX.
!
G
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
LO
2600A#2
2600A#1
26XXA
INTERLOCK
4200
INTERLOCK
!
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
1
3
2
MADE IN
U.S.A.
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
ense LO
Triaxial cables
(7078-TRX)
e HI
ns
HI
Connect
ground cable
(CA-568-120)
lugs to protective earth
Se
LO a
nd s
NO INTERNAL OPERATOR SERVICEABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
SENSE
LO
LO
HI
CHANNEL A
SENSE
HI
GUARD
GUARD
SENSE
HI
CHANNEL B
HI
LO
SENSE
LO
!
LINE FUSE LINE RATING
100-240VAC
SLOWBLOW
SERIAL NO.
RS-232
3.15A, 250V
50, 60Hz
250VA MAX.
MADE IN
U.S.A.
LISTED
SourceMeter
4ZA4
DIGITAL I/O
IEEE-488
LAN
B LO
A LO
TSP-Link
NO AUTO-MDIX
AMP
CAUTION:
R
AMP
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
Interlock cable (CA-558-2)
6-4
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
NOTE
If you want to use the test fixture interlock and output enable, see the Model 2651A Reference
Manual and the section "Using output enable."
Figure 29: Model 8010 to Model 2651A rear panel connections for the MOSFET application
example
MODELS 2657A, 2600A AND
4200-SMU CONNECTIONS
30V
MAX.
210V, 1.5A DC MAX.
30V
MAX.
SH
HI
SH
HI
4200
GND
UNIT
4200-SMU
SENSE
LO
LO
GUARD
SENSE
HI
HI
LO
2651A#2
2651A#1
40V, 15A DC, 50A PULSE MAX.
40V, 15A DC, 50A PULSE MAX.
SL
INPUT
SENSE/GUARD
S
LO G
G
G
LO
S
G HI
INPUT
SENSE/GUARD
HI
S
LO G
G
G
LO
S
G HI
HI
CAUTION: 15A DC or 100A PULSE MAX.
PULSE = 1% DUTY CYCLE
LO,SL
2657A
SH
HI
LO,SL
SH
HI
!
LO,SL
3280V, 120mA DC MAX.
2600A#2
!
2600A#1
210V, 1.5A DC,
210V, 1.5A DC,
10A PULSE MAX.
10A PULSE MAX.
PULSE = 1% DUTY CYCLE
!
1
3
2
WARNING: NO INTERNAL OPERATOR SERVICEABLE PARTS,
123456789
26XXA
INTERLOCK
4200
INTERLOCK
MADE IN
U.S.A.
MADE IN
U.S.A.
SERVICE BY QUALIFIED PERSONNEL ONLY.
LINE FUSE
SLOWBLOW
5.0A, 250V
LINE RATING
100-240VAC
50, 60Hz
550VA MAX.
RS-232
DIGITAL I/O
OUTPUT
SENSE/GUARD
IEEE-488
!
!
LAN
MADE IN
U.S.A.
TSP-Link
S
LO G
R
G
G
LO
S
G HI
HI
AMP
AMP
40V, 20A DC, 50A PULSE MAX.
LISTED
SourceMeter
4ZA4
123456789
NO INTERNAL OPERATOR SERVICEABLE PARTS,
CHANNEL A
REPLACE FUSE WITH SAME TYPE AND RATING.
!
WARNING: SERVICE BY QUALIFIED PERSONNEL ONLY.
Sense and guard (CA-557-1)
LO and HI
(2651A-KIT-1)
Sense and guard (CA-557-1)
Connect ground cable
(CA-568-120) lugs
to protective earth
LINE FUSE
SLOWBLOW
5.0A, 250V
LINE RATING
100-240VAC
50, 60Hz
550VA MAX.
RS-232
DIGITAL I/O
OUTPUT
SENSE/GUARD
IEEE-488
!
!
LAN
MADE IN
U.S.A.
AMP
TSP-Link
S
LO G
R
G
G
LO
S
G HI
HI
AMP
40V, 20A DC, 50A PULSE MAX.
123456789
8010-900-01 Rev. A / February 2012
LISTED
SourceMeter
4ZA4
NO INTERNAL OPERATOR SERVICEABLE PARTS,
CHANNEL A
REPLACE FUSE WITH SAME TYPE AND RATING.
!
WARNING: SERVICE BY QUALIFIED PERSONNEL ONLY.
6-5
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Install the device and make connections
To install a device in the Model 8010 and connect instruments to the device:
1. Ensure that the Model 8010-DTB or Model 8010-DTB-220 test board is installed. Refer to
Installing the test boards (on page 2-3) for information on installing the device test boards.
2. Remove the insulating plug if installed.
3. Install the device in the socket so that the gate terminal is connected to pins 1 and 4 of the device
test board.
4. Make the connections as shown in the graphic below.
Figure 30: Three-terminal DUT with one or two Model 2651A instruments and Series 2600A
instrument connected (remote sense)
2657A
2600A
#2
HI
HI
SHI
SHI
5
LO
4
4
1
4
4
1
SHI
SHI
CA-560-2
stack-up
banana cable
6-6
2
LO
LO
1
4
SLO
3
6
3
SLO
1
5
S
D
G
HI
HI
CA-562-2
high-current
banana cable
GUARD
SLO
3
6
2
TO-247
2
1
GUARD
1
4
3
GUARD
CA-562-0
high-current
banana cable
HIGH VOLTAGE
6
6
3
4200/2600A
#1
!
!
6
SLO
LO
4200
GNDU
LO
GUARD
CA-560-0
stacked at
terminal 3
SLO
6
HIGH CURRENT
3
!
2
2651A
CA-563
BNC-tobanana cable
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
Suppressing device oscillations (optional)
Power transistors are prone to self-oscillation under forward bias conditions. In such cases, there may
be oscillations or ringing in the gate or drain voltage waveforms. This would be visible using an
oscilloscope or the high speed ADC of the Model 2651A when monitoring the drain waveform.
Some manufacturers recommend adding a resistor in series with the gate terminal to suppress these
oscillations. The manufacturer may recommend a specific resistance value for this use or you may
determine an appropriate resistance value by trial and error. Resistors are not supplied with the
Model 8010, but customer-supplied leaded resistors may be easily installed in the Model 8010.
To add a series gate resistor in the Model 8010:
1.
2.
3.
4.
Loosen the binding post that is connected to pin 4 of the device test board.
Insert one end of the resistor into the opening at the base of the binding post.
Tighten the binding post to hold the resistor in place.
Remove the CA-563 cables that connect the Series 2600A HI and SHI terminals to pins 1 and 4
of the device test board.
5. Connect an alligator clip (customer-supplied) to the banana plug at the end of the SHI cable.
6. Connect the alligator clip to the other terminal of the axial resistor.
7. Stack the HI banana plug onto the SHI banana plug.
Figure 31: Three terminal DUT with a Model 2651A in remote with gate resistor installed
2657A
2600A
#2
GUARD
LO
LO
HI
HI
3
6
5
SLO
LO
1
SLO
1
5
S
D
G
2
3
SLO
3
6
2
TO-247
2
1
GUARD
1
4
3
GUARD
CA-562-0
high-current
banana cable
HIGH VOLTAGE
6
6
3
4200/2600A
#1
!
!
6
SLO
LO
4200
GNDU
LO
GUARD
4
1
1
4
4
HI
4
CA-560-0
stacked at
terminal 3
SLO
6
HIGH CURRENT
3
!
2
2651A
SHI
CA-562-2
high-current
banana cable
CA-560-2
stack-up
banana cable
8010-900-01 Rev. A / February 2012
SH
SHI
SHI
SHI
CA-563
BNC-tobanana cable
6-7
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Set up communication
The communication setup is illustrated in the following diagram. GPIB is used as an example, but this
application can be run using any of the supported communication interfaces for the instruments. A
TSP-Link® connection enables communication between two instruments. Commands for the
Model 2651A SMU #2 (node #2) and the Series 2600A SMU #3 (node #3) are sent over the TSP-Link
interface.
Figure 32: GPIB communication example for Rds(on) sweep
PU
ARM
SH
TO E DIT / E
2651A HIGH POWER SYSTEM SourceMeter ®
N
TE
GPIB
N
1
5
2
RUN
9
LIMIT
TO E D IT / E
8
MEAS
4
LOAD
SH
7
SRC
DIGITS SPEED
NF
CONFIG
PU
TE
R
R
DISPLAY
POWER
+/MODE
6
0
REL
FILTER
3
0000
STORE RECALL
OU
TPUT
ON
/ OFF
CURSOR
AUTO
LOCAL
TRIG
MENU
EXIT
ENTER
SH
TO E DIT / E
2651A HIGH POWER SYSTEM SourceMeter ®
N
TE
PU
Modell 2651A SMU #1 (TSP-Link Node #1)
N
8
9
MEAS
LIMIT
4
1
5
LOAD
2
RUN
TO E D IT / E
7
SRC
DIGITS SPEED
CONFIG
NF
SH
DISPLAY
POWER
PU
TE
R
R
TSP-Link
+/MODE
6
0
REL
FILTER
3
0000
STORE RECALL
AUTO
OU
TPUT
ON
/ OFF
CURSOR
LOCAL
TRIG
MENU
EXIT
ENTER
Mode
el 2651A SMU #2 (TSP-Link Node
e #2))
Model
Model 2611A, Model 2612A, Model 2635A,
or Model 2636A (TSP-Link Node #3)
To set the TSP-Link node number using the front-panel interface:
1. Press the MENU key.
2. Select TSPLink.
3. Select NODE.
4. Use the navigation wheel
to adjust the node number.
5. Press the ENTER key to save the TSP-Link node number.
On the Model 2651A SMU #1 (TSP-Link node #1), perform a TSP-Link reset to update it with the
linked instruments:
1. Press the MENU key.
2. Select TSPLink.
3. Select RESET.
6-8
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
NOTE
If error code 1205, "TSP-Link initialization failed (no remote nodes found)," is generated during the
TSP-Link reset, ensure that each SourceMeter instrument has a unique TSP-Link node number.
Example program code
NOTE
The example code is designed to be run from Test Script Builder or TSB Embedded. It can also be
run from other programming environments, such as Microsoft® Visual Studio® or National Instruments
LabVIEWTM. However, you may need to make changes to the example code to use other
programming environments.
The following script contains all the code necessary to perform an Rds(on) sweep up to 100 A using
two Model 2651A High Power System SourceMeters and a Series 2600A System SourceMeter®
Instrument. This script:
•
•
•
•
•
•
Initializes the TSP-Link® connection
Configures the source-measure units (SMUs)
Configures the trigger models of the two Model 2651A instruments
Prepares the reading buffers
Executes the test
Returns the collected data in a format that can be copied from the instrument console and pasted
into a Microsoft® Excel® spreadsheet.
The script is written using Test Script Processor (TSP) functions rather than as a single block of inline
code. TSP functions are similar to functions in other programming languages, such as Microsoft®
Visual C® or Visual Basic®. They must be called before the code in them is executed. Because of this,
running the script alone will not execute the test. To execute the test, you need to run the script to
load the functions into test script memory. You then call the functions.
Refer to the documentation for Test Script Builder or TSB Embedded for directions on how to run
scripts and enter commands using the instrument console.
The script contains comments. The comments describe what is being performed by the lines of code.
They also document the functions in the script. Lines starting with node[2]. are commands that are
being sent to the Model 2651A on node 2 through the TSP-Link interface. Lines starting with
node[3]. are commands that are being sent to the Series 2600A through the TSP-Link interface. All
other commands are executed on the master Model 2651A on node [1].
8010-900-01 Rev. A / February 2012
6-9
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
--[[
Title:
Combining SMUs for 100A Example
Description:
This script is designed to perform an Rds(on)sweep on a
power MOSFET device. It combines two 2651A SMUs in parallel to perform
a current sweep up to 100A. Data collected from the sweep is then
returned in a Microsoft Excel compatible format for plotting
and analysis.
Equipment needed:
2x 2651A
1x 26xxA
2x TSP-Link Cable
TSP-Link Configuration:
----------------------Unit
|
Node #
2651A #1
|
1
2651A #2
|
2
26xxA
|
3
Master Node (PC Interface): Node 1
]]
--[[
Name:
DualSmuRdson(gateLevel, dstart, dstop, dsteps, pulseWidth,
pulsePeriod, pulseLimit)
Description:
This function uses two 2651A SMUs to perform a pulsed Rds(on)
sweep with currents up to 100A.
Parameters:
gateLevel:
The gate level to be used during the sweep
dstart:
The starting current level of the drain sweep
dstop:
The ending current level of the drain sweep
dsteps:
The number of steps in the drain sweep
pulseWidth: The width of the drain pulse in seconds
pulsePeriod: The time from the start of one drain pulse to
the next in seconds
pulseLimit: The voltage limit of the drain pulse in volts
Note: Actual pulse limit will be 10% lower than setting
to protect SMUs in a compliance condition
Example Usage:
DualSmuRdson(10, 1, 100, 100, 500e-6, 50e-3, 10)
]]
6-10
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
function DualSmuRdson(gateLevel, dstart, dstop, dsteps, pulseWidth, pulsePeriod,
pulseLimit)
tsplink.reset(3) -- Verify that at least three nodes are present
reset()
-- Configure 2651A #1 (Drain SMU 1)
----------------------------------smua.reset()
smua.source.func
= smua.OUTPUT_DCAMPS
smua.sense
= smua.SENSE_REMOTE
smua.source.offmode
= smua.OUTPUT_NORMAL
smua.source.offfunc
= smua.OUTPUT_DCVOLTS
smua.source.offlimiti
= 1e-3
-- Set off limit
-----
SMU #1 will be a 0 V voltage source with 1mA limit when its
output is turned off. SMU #2 will be a 0 A current source with
a 10 V limit when the output is turned off. These settings keep
the parallel combination safe in case one SMU is turned off.
smua.source.rangei = math.max(math.abs(dstart / 2), math.abs(dstop / 2))
smua.source.leveli
= 0
-- Sets the DC bias level
smua.source.limitv
= 9
-- Sets the DC bias limit
-- SMU #2 will have a voltage limit of 10V. By setting the voltage
-- limit 10% lower than that of SMU #2, we can ensure that only
-- one of the two SMUs will ever go into compliance and become a
-- voltage source. This is desirable, because if both SMUs went
-- into compliance, there would be two voltage sources in parallel,
-- which is an unsafe condition.
smua.measure.nplc
= 0.005
smua.measure.rangev
= pulseLimit
smua.measure.autozero
= smua.AUTOZERO_ONCE
smua.measure.delay
=
pulseWidth - ((1 / localnode.linefreq) * smua.measure.nplc)) - 20e-6
-- Set the delay so that the measurement is near the end of the pulse
-- Prepare the reading buffers
smua.nvbuffer1.clear()
smua.nvbuffer1.collecttimestamps
smua.nvbuffer1.collectsourcevalues
smua.nvbuffer1.fillmode
smua.nvbuffer2.clear()
smua.nvbuffer2.collecttimestamps
smua.nvbuffer2.collectsourcevalues
smua.nvbuffer2.fillmode
= 1
= 1
= smua.FILL_ONCE
= 1
= 1
= smua.FILL_ONCE
-- Configure TSP-Link Trigger 1
tsplink.trigger[1].clear()
tsplink.trigger[1].mode
= tsplink.TRIG_FALLING
tsplink.trigger[1].stimulus
= trigger.timer[1].EVENT_ID
-- TSP-Link Trigger 1 signals 2651A #2 to pulse
8010-900-01 Rev. A / February 2012
6-11
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
-- Timer 1 controls the pulse period by triggering the pulse to begin
trigger.timer[1].count
= dsteps - 1
trigger.timer[1].delay
= pulsePeriod
trigger.timer[1].passthrough
= true
trigger.timer[1].stimulus
= smua.trigger.ARMED_EVENT_ID
trigger.timer[1].clear()
-- Timer 2 controls the pulse width
trigger.timer[2].count
= 1
trigger.timer[2].delay
= pulseWidth - 3e-6
trigger.timer[2].passthrough
= false
trigger.timer[2].stimulus
= smua.trigger.SOURCE_COMPLETE_EVENT_ID
trigger.timer[2].clear()
-- Configure SMU Trigger Model for Sweep
-- Each unit will source half the current, so divide the start
-- and stop values by 2
smua.trigger.source.lineari(dstart / 2, dstop / 2, dsteps)
smua.trigger.source.limitv
= pulseLimit - (pulseLimit * 0.1)
-- Again, keep the limit SMU #1 lower than the limit of SMU #2
-- to prevent parallel V-sources
smua.trigger.measure.iv(smua.nvbuffer1, smua.nvbuffer2)
smua.trigger.measure.action
= smua.ENABLE
-- Return to the bias level at the end of the pulse/sweep
smua.trigger.endpulse.action
= smua.SOURCE_IDLE
smua.trigger.endsweep.action
= smua.SOURCE_IDLE
smua.trigger.count
smua.trigger.arm.stimulus
smua.trigger.source.stimulus
smua.trigger.measure.stimulus
smua.trigger.endpulse.stimulus
smua.trigger.source.action
=
=
=
=
=
=
dsteps
0
trigger.timer[1].EVENT_ID
0
trigger.timer[2].EVENT_ID
smua.ENABLE
-- Configure 2651A #2 (Drain SMU 2)
----------------------------------node[2].smua.reset()
node[2].smua.source.func
= node[2].smua.OUTPUT_DCAMPS
node[2].smua.sense
= node[2].smua.SENSE_REMOTE
node[2].smua.source.offmode
= node[2].smua.OUTPUT_NORMAL
node[2].smua.source.offfunc
= node[2].smua.OUTPUT_DCAMPS
node[2].smua.source.offlimitv
= 10
-- Set off limit
-- SMU is a 0 A current source with 10 V limit when output is turned off
node[2].smua.source.rangei
=
math.max(math.abs(dstart / 2), math.abs(dstop / 2))
node[2].smua.source.leveli
= 0
-- Sets the DC bias level
node[2].smua.source.limitv
= 10
-- Sets the DC bias limit
node[2].smua.measure.nplc
= 0.005
node[2].smua.measure.rangev
= pulseLimit
node[2].smua.measure.autozero
= node[2].smua.AUTOZERO_ONCE
node[2].smua.measure.delay
= (pulseWidth ((1 / node[2].linefreq) * node[2].smua.measure.nplc)) - 20e-6
-- Set the delay so that the measurement is near the end of the pulse
6-12
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
-- Prepare the reading buffers
node[2].smua.nvbuffer1.clear()
node[2].smua.nvbuffer1.collecttimestamps
node[2].smua.nvbuffer1.collectsourcevalues
node[2].smua.nvbuffer1.fillmode
node[2].smua.nvbuffer2.clear()
node[2].smua.nvbuffer2.collecttimestamps
node[2].smua.nvbuffer2.collectsourcevalues
node[2]. smua.nvbuffer2.fillmode
= 1
= 1
= node[2].smua.FILL_ONCE
= 1
= 1
= node[2].smua.FILL_ONCE
-- Configure TSP-Link Trigger 1
node[2].tsplink.trigger[1].clear()
node[2].tsplink.trigger[1].mode = node[2].tsplink.TRIG_FALLING
-- Timer 1 controls the pulse width
node[2].trigger.timer[1].count
= 1
node[2].trigger.timer[1].delay
= pulseWidth - 3e-6
node[2].trigger.timer[1].passthrough
= false
node[2].trigger.timer[1].stimulus
=
node[2].smua.trigger.SOURCE_COMPLETE_EVENT_ID
node[2].trigger.timer[1].clear()
-- Configure SMU Trigger Model for Sweep
node[2].smua.trigger.source.lineari(dstart / 2, dstop / 2, dsteps)
node[2].smua.trigger.source.limitv
= pulseLimit
node[2].smua.trigger.measure.iv(node[2].smua.nvbuffer1, node[2].smua.nvbuffer2)
node[2].smua.trigger.measure.action
= node[2].smua.ENABLE
-- Return the output to the bias level at the end of the pulse/sweep
node[2].smua.trigger.endpulse.action
= node[2].smua.SOURCE_IDLE
node[2].smua.trigger.endsweep.action
= node[2].smua.SOURCE_IDLE
node[2].smua.trigger.count
= dsteps
node[2].smua.trigger.arm.stimulus
= 0
node[2].smua.trigger.source.stimulus
=
node[2].tsplink.trigger[1].EVENT_ID
node[2].smua.trigger.measure.stimulus
= 0
node[2].smua.trigger.endpulse.stimulus
= node[2].trigger.timer[1].EVENT_ID
node[2].smua.trigger.source.action
= node[2].smua.ENABLE
-- Configure the 26xxA (Gate SMU)
--------------------------------node[3].smua.reset()
node[3].smua.source.func
= node[3].smua.OUTPUT_DCVOLTS
node[3].smua.sense
= node[3].smua.SENSE_REMOTE
node[3].smua.source.levelv
= gateLevel
node[3].smua.source.highc
= node[3].smua.ENABLE
-- If you find your gate oscillating even with a dampening resistor
-- in place, try enabling the high capacitance mode to help
-- stabilize the gate.
8010-900-01 Rev. A / February 2012
6-13
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
-- Prepare the reading buffers
node[3].smua.nvbuffer1.clear()
node[3].smua.nvbuffer1.collectsourcevalues
if node[3].smua.nvbuffer1.fillmode
node[3].smua.nvbuffer1.fillmode
end
node[3].smua.nvbuffer2.clear()
node[3].smua.nvbuffer2.collectsourcevalues
if node[3].smua.nvbuffer2.fillmode
node[3].smua.nvbuffer2.fillmode
end
--------------------------- Ready to begin the test
--------------------------- Outputs on
node[3].smua.source.output
node[2].smua.source.output
smua.source.output
= 1
~= nil then
= node[3].smua.FILL_ONCE
= 1
~= nil then
= node[3].smua.FILL_ONCE
= node[3].smua.OUTPUT_ON
= node[2].smua.OUTPUT_ON
= smua.OUTPUT_ON
if errorqueue.count > 0 then
print("Errors were encountered")
reset()
return
end
-- Give the gate some time to settle before starting the sweep
delay(0.001)
node[3].smua.measure.iv(node[3].smua.nvbuffer1, node[3].smua.nvbuffer2)
-- Start the 2651A #2 trigger model
node[2].smua.trigger.initiate()
-- Start the 2651A #1 trigger model
smua.trigger.initiate()
-- Wait until test is complete
waitcomplete()
-- Outputs off
node[3].smua.source.output
smua.source.output
node[2].smua.source.output
= node[3].smua.OUTPUT_OFF
= smua.OUTPUT_OFF
= node[2].smua.OUTPUT_OFF
-- Print back data
PrintDualSmuRdsonData()
end
6-14
8010-900-01 Rev. A / February 2012
Model 8010 High Power Device Test Fixture User's Manual
Section 6: On-state characterization of a power MOSFET
--[[
Function:
PrintDualSmuRdsonData()
Description:
This function processes the data stored in the SMU reading buffers by
function DualSmuRdson() and prints back the individual SMU data and the
combined SMU data and Rds(on) readings in a format that is copy and paste
compatible with Microsoft Excel.
]]
function PrintDualSmuRdsonData()
-- Print the gate SMU readings
print("Gate SMU\r\nSource Value\tVoltage\tCurrent")
print(string.format("%0.2f\t%g\t%g\r\n",
node[3].smua.nvbuffer1.sourcevalues[1],
node[3].smua.nvbuffer2[1],
node[3].smua.nvbuffer1[1]))
-- Print column headers
print("Timestamp\tSource Value\tVoltage 1\tCurrent 1\tVoltage
2\tCurrent 2\tVoltage\tCurrent\tRds(on)")
-- Loop through the reading buffer printing one row at a time
for i = 1,smua.nvbuffer1.n do
-- Combined Source Level = SMU1 source level + SMU2 source level
sourceLevel = smua.nvbuffer1.sourcevalues[i] +
node[2].smua.nvbuffer1.sourcevalues[i]
-- Combined Voltage = Average(SMU1 Voltage reading, SMU2 Voltage reading)
combinedVoltage = (smua.nvbuffer2[i] + node[2].smua.nvbuffer2[i]) / 2
-- Combined Current = SMU1 Current reading + SMU2 Current reading
combinedCurrent = smua.nvbuffer1[i] + node[2].smua.nvbuffer1[i]
-- Rds(on) = Combined Voltage / Combined Current
rdson = combinedVoltage / combinedCurrent
-- Print a row of data
print(string.format("%g\t%g\t%g\t%g\t%g\t%g\t%g\t%g\t%g",
smua.nvbuffer1.timestamps[i],
sourceLevel,
smua.nvbuffer2[i],
smua.nvbuffer1[i],
node[2].smua.nvbuffer2[i],
node[2].smua.nvbuffer1[i],
combinedVoltage,
combinedCurrent,
rdson))
end
end
8010-900-01 Rev. A / February 2012
6-15
Section 6: On-state characterization of a power MOSFET
Model 8010 High Power Device Test Fixture User's Manual
Example program usage
The functions in this script allow the sweep parameters of the test to be adjusted without having to
rewrite and rerun the script. A test can be executed by calling the function
DualSmuRdson(gateLevel, dstart, dstop, dsteps, pulseWidth, pulsePeriod,
pulseLimit) with the appropriate values passed to it in its parameters.
DualSmuRdson() parameters
Parameter
Units
Description
gateLevel
dstart
dstop
dsteps
pulseWidth
pulsePeriod
Volts
Amperes
Amperes
Not applicable
Seconds
Seconds
pulseLimit
Volts
The voltage level to hold the gate
The level of the first step in the drain sweep
The level of the last step in the drain sweep
The number of steps in the drain sweep
The width of the pulse in the drain sweep
The time between the start of consecutive pulses in the
drain sweep
The voltage limit of the pulses in the drain sweep
An example call to this function is as follows:
DualSmuRdson(10, 1, 100, 100, 500e-6, 50e-3, 10)
This call will set the gate source-measure unit (SMU) output to 10 V and then sweep the drain of the
device from 1 A to 100 A in 100 points. The points of this sweep will be gathered using pulsed
measurements with a pulse width of 500 µs and a pulse period of 50 ms for a 1 percent duty cycle.
These pulses will be limited to a maximum of 10 V. At the end of the sweep, all SMU outputs will be
turned off. The resulting data from this test will be returned in a Microsoft® Excel® compatible format
(you can cut and paste the output from the console) that can be used for graphing and analysis.
The data can be plotted to show drain current versus Rds(on) for the DUT. The following graphic is
an example of this plot.
Figure 33: Example Rds(on) curves for a power MOSFET device
0.02
0.019
0.018
Rds(on)
0.017
0.016
Vgs = 10 V
Vgs = 6 V
0.015
0.014
0.013
0.012
0.011
0.01
0
10
20
30
40
50
60
70
80
90
100
Ids (amperes)
6-16
8010-900-01 Rev. A / February 2012
Section 7
Troubleshooting FAQs
In this section:
Noisy low current measurements ............................................. 7-1
Interlock error message ........................................................... 7-1
Can high-current SMUs be used separately inside the fixture? 7-1
The device is oscillating. How do I correct this?....................... 7-2
Can I use local sense for high-current or lower power SMUs?. 7-2
Can I operate the test fixture with the lid open? ....................... 7-2
Noisy low current measurements
I'm not getting the low current performance I expected. My current measurements are noisy.
What is wrong?
Several factors can contribute to poor low current performance in the Model 8010 High Power Device
Test Fixture.
The device test boards in the Model 8010 are not guarded. Therefore, the typical leakage current of
the fixture is about 10 pA. These boards are subject to contamination, which will result in larger
leakage currents. If you are using the boards for low leakage measurements, inspect and clean the
device test boards regularly. See How to clean the Model 8010 Test Fixture (on page 8-1) for detail.
Interlock error message
The SourceMeter Instrument (SMU) output will not turn on and I get an error message about
the interlock on the SMU front panel. What is wrong?
The lid of the Model 8010 test fixture contains a switch that controls the interlock of the Model 2657A
and Series 2600A SourceMeter instruments. Closing the lid closes the switch and engages the
interlock.
Make sure the interlock cables (part number CA-558-2) are properly connected between the
instruments and the test fixture and that the lid of the test fixture is fully closed.
For additional information on interlocks, see Using the interlock (on page 2-5). Also see the reference
manuals for your SMUs.
Can high-current SMUs be used separately inside the fixture?
No. The Model 8010 test fixture contains two connections for Model 2651A High Power SourceMeter
instruments on its back panel. These two connections allow you to output up to a 100 A pulse using
two instruments. Internally, these connectors are wired in parallel and are presented as a single
output. This connection cannot be reconfigured.
Section 7: Troubleshooting FAQs
Model 8010 High Power Device Test Fixture User's Manual
The device is oscillating. How do I correct this?
During on-state characterization of MOSFET and IGBT devices, high-current pulses that travel
through the channel of the device may cause the gate of the device to oscillate. The instability of the
gate voltage will result in unstable measurements through the device channel.
To dampen these oscillations and stabilize the gate, you can insert a resistor between the gate of the
device and the SourceMeter Instrument (SMU) connected to the gate. See How to insert a resistor on
a device terminal (on page 3-6) for detail.
The appropriate gate resistor value is device-dependent. However, typical gate resistor values range
from tens to hundreds of ohms.
If the gate remains unstable after inserting a dampening resistor, enable the high-capacitance mode
(if available) on the SMU connected to the gate.
Can I use local sense for high-current or lower power SMUs?
Yes. All SMUs that are connected to the Model 8010 test fixture may be used in a two-wire (local
sense) configuration.
NOTE
Four-wire remote sense is recommended when device resistances are low enough (less than 1 kΩ)
that resistance in the test leads will cause significant error in the measurement. For more information,
in the Series 2600A or Model 2651A Reference Manual, see "DUT test connections" for information
on two-wire and four-wire sensing.
Can I operate the test fixture with the lid open?
The lid of the Model 8010 test fixture isolates the operator from hazardous voltages that are
potentially present at the device under test and cable ports. The lid also functions as a blast shield,
protecting the user from flying debris and fire.
The interlock circuitry of the Model 8010 test fixture is designed to be engaged only when the lid is
closed. If the lid is open, the interlock is disengaged and any SourceMeter Instruments (SMUs) with
outputs that are configured for high voltage will not turn on.
Low voltage SMUs may still operate with the lid open and without the interlock connected. For
example, the Model 2651A will still operate if the output enable function is not activated. Additionally,
the Models 2611A, 2612A, 2635A, 2636A, and 4200-SMU will operate if they are programmed to the
20 V range or lower.
For additional information on interlocks, see Using the interlock (on page 2-5). Also see the reference
manuals for your SMUs.
WARNING
Always perform tests with the Model 8010 lid closed. Performing tests with the test fixture lid
open may expose the user to electrical, burn, and projectile hazards.
7-2
8010-900-01 Rev. A / February 2012
Section 8
Maintenance
In this section:
Replacing the boards ............................................................... 8-1
How to clean the Model 8010 Test Fixture ............................... 8-1
Connector and socket cleaning ................................................ 8-2
Adjusting the lid hinges ............................................................ 8-2
Replacing the boards
The Model 8010 is shipped with two 8010-DTB Device Test Boards installed. The boards include
connections for TO-247 and axial-lead devices.
The Model 8010 is also shipped with an 8010-CTB Customizable Test Board, which allows you to
add your own connections.
In addition, you can purchase the 8010-DTB-220 Device Test Board for use with three-terminal
TO-220 or TO-247 devices. This board is limited to 1000 V.
You can also purchase replacement 8010-DTB boards and 8010-CTB boards.
You can replace any of these boards as needed. For replacement instructions, see Installing the test
boards (on page 2-3).
How to clean the Model 8010 Test Fixture
To prevent contamination that may degrade performance, use care when handling or servicing the
test fixture.
To avoid damage to the test fixture, do not use any abrasive or chemical cleaning agents.
To clean the Model 8010:
1. Remove power from all instruments that are connected to the test fixture.
2. Remove loose dust on the outside and inside of the test fixture with a lint-free cloth.
3. Use a soft cloth or swap dampened with water to clean the test fixture. Use an aqueous solution
of 75% isopropyl alcohol for more efficient cleaning. Avoid getting moisture inside the test fixture
during cleaning. Use only enough cleaning solution to dampen the cloth or swab.
If a board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning and servicing.
Section 8: Maintenance
Model 8010 High Power Device Test Fixture User's Manual
Connector and socket cleaning
The performance of connectors and sockets can degrade because of dirt build-up or improper
handling. You can clean connectors and sockets with methanol-dipped cotton swabs.
After cleaning connectors and sockets, allow them to dry for at least one hour in a 50 °C low-humidity
environment.
Adjusting the lid hinges
You can adjust the tension on the hinges on the lid of the Model 8010.
To adjust the tension, tighten or loosen the center screw on each hinge. See the following illustration
for the screw location.
Figure 34: Model 8010 hinge adjustment
8-2
8010-900-01 Rev. A / February 2012
Section 9
Next steps
In this section:
Additional information............................................................... 9-1
Additional information
This manual has prepared you to start using your new Model 8010 for your real-world applications.
For connection overviews, see the "Interconnection Reference Guide." It provides a quick reference
for typical test connections. It also shows you how to install and set up the instrument. The
"Interconnection Reference Guide" is provided with the test fixture and is also available as a PDF on
the CD-ROMs that came with the test fixture.
For more detailed information about the SourceMeter instruments, refer to the SourceMeter
instrument reference manuals.
The CD-ROMs that are included with your test fixture contain the following Model 8010 product
document in PDF:
•
•
•
The Interconnection Reference Guide
•
•
The data sheet
This User’s Manual
Information for the TO-247 Device Test Board (8010-DTB), 8010-CTB Customizable Test Board
(8010-CTB), and TO-220 or TO-247 Device Test Board (8010-DTB-220)
The product specifications
For additional support information, see http://www.keithley.com/support (http://www.keithley.com).
Index
A
access port • 2-12
accessories, available • 1-2
applications
axial-lead device high current test • 5-1
fast ADC • 5-1
MOSFET characterization • 4-1
power MOSFET characterize Rds(on) • 6-1
axial-lead device high current test • 5-1
L
low current measurements, improve • 7-1
M
maintenance • 8-1
measurement
considerations • 3-3
MOSFET characterization • 4-1
B
O
board replacement • 8-1
oscillation
suppress • 3-6, 7-2
oscilloscope probe • 2-12
C
characteristics • 1-3
cleaning
connectors and sockets • 8-2
test fixture • 8-1
connection • 3-2, 3-3
rear panel • 2-1, 2-5
contact information • 1-2
E
error messages
interlock • 7-1
examples
Combining SMUs for 100 A current sweep • 6-9,
6-16
fast-sampling ADC (examples) • 5-4
F
FAQs • 7-1
G
guard • 3-7
H
hinge adjustment • 8-2
I
installation
device, axial posts • 3-2
device, TO socket • 3-3
insulating plug • 3-3
interlock • 2-5, 7-1
P
poor low current performance • 7-1
port access • 2-12
protection circuitry • 2-12
R
rear panel
access port • 2-12
connection details • 2-5
Model 2611A • 2-6
Model 2612A • 2-6
Model 2635A • 2-7
Model 2636A • 2-7
Model 2651A • 2-8
Model 2657A • 2-9
Model 4200 • 2-10, 2-11
Model 4210-SMU • 2-10, 2-11
summary • 2-1
S
safety information • 3-1
scripts
Examples • 5-4, 5-9, 6-9, 6-16
T
test board
about • 1-2, 3-1
install device • 3-2, 3-3
installation • 2-3
troubleshooting
FAQs • 7-1
Index
Model 8010 High Power Device Test Fixture User's Manual
interlock error message • 7-1
W
Warranty • 1-2
2
8010-900-01 Rev. A / February 2012
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