datasheet for PA89A by Apex Microtechnology
PA89PA89
• PA89A
• PA89A
PA89, PA89A
High Voltage Power Operational Amplifiers
FEATURES
•
•
•
•
•
•
1140V P-P SIGNAL OUTPUT
WIDE SUPPLY RANGE — ±75V to ±600V
PROGRAMMABLE CURRENT LIMIT
75 mA CONTINUOUS OUTPUT CURRENT
HERMETIC SEALED PACKAGE
INPUT PROTECTION
PATENTED
APPLICATIONS
•
•
•
•
HIGH VOLTAGE MO-127
PACKAGE STYLE DC
PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC DEFLECTION
SEMICONDUCTOR TESTING
TYPICAL APPLICATION
Ultra-high voltage capability combined with the bridge ampliier coniguration makes it possible to develop +/–1000 volt
peak swings across a piezo element. A high gain of –50 for
A1 insures stability with the capacitive load, while “noise-gain”
compensation Rn and Cn on A2 insure the stability of A2 by
operating in a noise gain of 50.
DESCRIPTION
The PA89 is an ultra high voltage, MOSFET operational ampliier designed for output currents up to 75 mA. Output voltages
can swing over 1000V p-p. The safe operating area (SOA) has
no second breakdown limitations and can be observed with
all types of loads by choosing an appropriate current limiting
resistor. High accuracy is achieved with a cascode input circuit
coniguration and 120dB open loop gain. All internal biasing is
referenced to a bootstrapped zener-MOSFET current source,
giving the PA89 a wide supply range and excellent supply
rejection. The MOSFET output stage is biased for class A/B
linear operation. External compensation provides user lexibility.
The PA89 is 100% gross leak tested to military standards for
long term reliability.
This hybrid integrated circuit utilizes a beryllia (BeO) substrate, thick ilm resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top
performance. Ultrasonically bonded aluminum wires provide
reliable interconnections at all operating temperatures. The
MO-127 High Voltage, Power Dip™ package is hermetically
sealed and electrically isolated. The use of compressible
thermal washers will void the product warranty.
50R
50R
R
Q1
Q2
COMP
9
10
–IN
1
Q22
Q23
Q25A
Q25B
–600V
Q26
EXTERNAL CONNECTIONS
D34
D35
D31
+IN
1
12
2
11
N/C
3
N/C
4
–VS
6
OUT
Q44
D5
TOP
VIEW
10
–VS
5
RESERVED
CC
COMP
9
5
8
6
7
+VS
COMP
RC
CL
R CL =
CL
Q42
Q45
www.apexanalog.com
PA89U
RESERVED
–IN
7
Q29
Q36
D30
–600V
OUT
Q20
Cn
SINGLE AXIS MICRO-POSITIONING
.7
I
LIM
R CL
+IN
2
A2
PA89
PIEZO
TRANSDUCER
Q19
D57
R
A1
PA89
V IN
8
+VS
D1
+600V
+600V
SIMPLIFIED SCHEMATIC
Q3
50R
PHASE COMPENSATION
Gain
1
10
15
100
CC
470pF
68pF
33pF
15pF
RC
470Ω
220Ω
220Ω
220Ω
Note: CC must be rated for full supply voltage –Vs to +Vs.
See details under “EXTERNAL COMPONENTS”.
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OCT 2012
1
PA89U REVM
PA89 • PA89A
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal at TC = 25°C
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s max
TEMPERATURE, junction2
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
MIN
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. time
BIAS CURRENT, initial3
BIAS CURRENT,vs. supply
OFFSET CURRENT, initial3
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE4
COMMON MODE REJECTION, DC
INPUT NOISE
Full temperature range
Full temperature range, VCM = ±90V
10kHz BW, RS = 10K, CC = 15pF
±VS 50
96
GAIN
OPEN LOOP GAIN at 15Hz
GAIN BANDWIDTH PRODUCT
POWER BANDWIDTH
PHASE MARGIN
RL = 10k, CC = 15pF
RL = 10k, CC = 15pF, AV = 100
RL = 10k, CC = 15pF, VO = 500V p-p
Full temperature range, AV = 10
108
OUTPUT
VOLTAGE SWING4
VOLTAGE SWING4
CURRENT, continuous
SLEW RATE
CAPACITIVE LOAD, Av = 10
CAPACITIVE LOAD, Av>10
SETTLING TIME to .1%
IO = 75mA
Full temperature range, IO = 20mA
Full temperature range
CC = 15pF, AV = 100
Full temperature range
Full temperature range
RL = 10KΩ, 10V step, Av = 10
Full temperature range
Full temperature range, F > 60Hz
Full temperature range, F < 60Hz
Full temperature range
Meets full range speciications
MIN
2
30
50
*
*
110
4
120
10
5
60
PA89A
TYP
.25
5
*
*
3
*
3
*
*
50
±VS 45 ±VS 30
±VS 20 ±VS 12
75
12
16
±
±
THERMAL
RESISTANCE, AC, junction to case5
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
.5
10
7
75
5
.01
5
105
4
Full temperature range
MAX
±
POWER SUPPLY
VOLTAGE, VS4
CURRENT, quiescent
PA89
TYP
±
±
TEST CONDITIONS 1
PARAMETER
1200V
100mA
40W
±25V
±VS 50V
350°C
150°C
–65 to 125°C
–55 to 125°C
±
ABSOLUTE MAXIMUM RATINGS
.5
10
mV
µV/°C
µV/V
µV/kh
pA
pA/V
pA
MΩ
pF
V
dB
µV RMS
10
20
*
*
*
*
*
dB
MHz
kHz
°
*
*
*
*
*
*
V
V
mA
V/µs
nF
*
*
*
2
–25
UNITS
*
1
SOA
±75
MAX
*
±500
4.8
±600
6.0
2.1
3.3
15
2.3
3.5
+85
*
*
µs
*
*
*
*
V
mA
*
*
*
*
*
°C/W
°C/W
°C/W
°C
*
NOTES: * The speciication of PA89A is identical to the speciication for PA89 in applicable column to the left.
1. Unless otherwise noted: TC = 25°C, CC = 68pF, RC = 220Ω, and VS = ±500V. Input parameters for bias currents and offset voltage are ± values given.
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to
achieve high MTTF.
3. Doubles for every 10°C of temperature increase.
4. +VS and –VS denote the positive and negative supply rail respectively.
5. Rating applies only if the output current alternates between both output transistors at a rate faster than 60Hz.
CAUTION
2
The PA89 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
PA89U
PA89 • PA89A
16
8
68pf, 220
–180
15pf, 220
0
25
50
75 100 125 150
CASE TEMPERATURE, TC (°C)
SMALL SIGNAL RESPONSE
15pf, 220
33pf, 220
80
60
40
68pf, 220
20
0
CC, RC
1
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
10
1
OUTPUT VOLTAGE SWING
30
25
20
15
10
5
0
0
1
VS = ±500V
CC = 15pf, RC = 220
RL = 11K
AV = 100
.1
VO = 800Vpp
80
60
40
20
0
PA89U
1
10
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
100
VO = 600Vpp
VO = 400Vpp
.001
30
POWER SUPPLY REJECTION, PSR (dB)
COMMON MODE REJECTION
100
100
VO = 100Vpp
.95
.9
POWER SUPPLY REJECTION
60
40
20
1
10
0
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
200 400 600 800 1000 1200
TOTAL SUPPLY VOLTAGE, VS (V)
POWER RESPONSE
CC = 15pf
600
500
300
CC = 33pf
CC = 68pf
100
1K
100 300 1K 3K 10K 30K 100K
FREQUENCY, F (Hz)
80
0
1.00
HARMONIC DISTORTION
.01
0
75
25
50.
100
EXT. COMPENSATION CAPACITOR, CC (pF)
25
50
75
OUTPUT CURRENT, IO,(mA)
1.05
1200
1000
800
35
10
5
10 100 1K 10K 100K 1M 10M
FREQUENCY F (Hz)
40
SLEW RATE VS COMP
15
CC, RC
45
DISTORTION, THD (%)
20
10
–270
OUTPUT VOLTAGE, VO (VP-P)
0
QUIESCENT CURRENT
1.10
RC = 220
3K
30K
10K
FREQUENCY, F (Hz)
100K
INPUT NOISE VOLTAGE
20
15
10
7
5
3
2
10
100
10K
1K
FREQUENCY, F (Hz)
100K
CURRENT LIMIT
100
CURRENT LIMIT, ILIM (mA)
OPEN LOOP GAIN, A (dB)
–135
–225
100
SLEW RATE, (V/ μS)
–90
NORMALIZED QUIESCENT CURRENT, IQ (X)
PHASE, Ф (°)
24
120
COMMON MODE REJECTION, CMR (dB)
33pf, 220
–45
32
–20
PHASE RESPONSE
0
INPUT NOISE VOLTAGE, eN (nV/ Hz)
POWER DERATING
40
VOLTAGE DROP FROM SUPPLY, VS-VO (V)
OUTPUT STAGE
INTERNAL POWER DISSIPATION, P(W)
TYPICAL PERFORMANCE GRAPHS
80
60
40
20
0
0
20
80
40
60
RESISTOR VALUE, RCL ( )
100
3
PA89 • PA89A
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and speciication
interpretation. Visit www.apexanalog.com for design tools that
help automate tasks such as calculations for stability, internal
power dissipation, current limit; heat sink selection; Apex Microtechnology’s complete Application Notes library; Technical
Seminar Workbook; and Evaluation Kits.
STABILITY
Although the PA89 can be operated at unity gain, maximum
slew rate and bandwidth performance was designed to be
obtained at gains of 10 or more. Use the small signal response
and phase response graphs as a guide. In applications where
gains of less than 10 are required, use noise gain compensation to increase the phase margin of the application circuit as
illustrated in the typical application drawing.
SAFE OPERATING AREA (SOA)
OUTPUT CURRENT FROM +VS OR –VS (mA)
The MOSFET output stage of this power operational ampliier has two distinct limitations:
1. The current handling capability of the MOSFET geometry
and the wire bonds.
2. The junction temperature of the output MOSFETs.
NOTE: The output stage is protected against transient lyback.
However, for protection against sustained, high energy lyback,
external fast-recovery diodes should be used.
100
SOA
10mS
25°C
50
100mS
30
15
125°C
full supply voltage range. For example, with supply voltages
of ±500V the possible voltage swing across CC is 1000V. In
addition, a voltage coefficient less than 100PPM is recommended to maintain the capacitance variation to less than
5% for this example. It is strongly recommended to use the
highest quality capacitor possible rated at least twice the total
supply voltage range.
Of equal importance are the voltage rating and voltage coeficient of the gain setting resistances. Typical voltage ratings of
low wattage resistors are 150 to 250V. In the above example
1000V could appear across the feedback resistor. This would
require several resistors in series to obtain the proper voltage
rating. Low voltage coefficient resistors will insure good gain
linearity. The wattage rating of the feedback resistor is also of
concern. A 1 megohm feedback resistor could easily develop
1 watt of power dissipation.
Though high voltage rated resistors can be obtained,
a 1 megohm feedback resistor comprised of ive 200Kohm,
1/4 watt metal ilm resistors in series will produce the proper
voltage rating, voltage coefficient and wattage rating.
CURRENT LIMIT
For proper operation the current limit resistor (RCL) must be
connected as shown in the external connection diagram. The
minimum value is 3.5 ohm, however for optimum reliability the
resistor value should be set as high as possible. The value
is calculated as follows with the maximum practical value of
150 ohms.
.7
RCL =
ILIM
When setting the value for RCL allow for the load current as
well as the current in the feedback resistor. Also allow for the
temperature coefficient of the current limit which is approximately -0.3% /°C of case temperature rise.
CAUTIONS
85°C
10
5
T = TCASE
3
200
100
300
500
800 1000 1200
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, VS – VO (V)
SAFE OPERATING CURVES
The safe operating area curves deine the maximum additional internal power dissipation the ampliier can tolerate
when it produces the necessary output to drive an external
load. This is not the same as the absolute maximum internal
power dissipation listed elsewhere in the speciication since the
quiescent power dissipation is signiicant compared to the total.
EXTERNAL COMPONENTS
The operating voltages of the PA89 are potentially lethal.
During circuit design, develop a functioning circuit at the lowest
possible voltages. Clip test leads should be used for “hands
off” measurements while troubleshooting.
POWER SUPPLY PROTECTION
Unidirectional zener diode transient absorbers are recommended as protection on the supply pins. The zeners clamp
transients to voltages within the power supply rating and also
clamp power supply reversals to ground. Whether the zeners
are used or not, the system power supply should be evaluated
for transient performance including power-on overshoot and
power-off polarity reversals as well as line regulation.
Conditions which can cause open circuits or polarity reversals
on either power supply rail should be avoided or protected
against. Reversals or opens on the negative supply rail is
known to induce input stage failure. Unidirectional transzorbs
prevent this, and it is desirable that they be both electrically
and physically as close to the ampliier as possible.
The very high operating voltages of the PA89 demand consideration of two component speciications rarely of concern in
building op amp circuits: voltage rating and voltage coefficient.
The compensation capacitance CC must be rated for the
4
PA89U
PA89 • PA89A
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact [email protected]
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To ind the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any speciications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not
extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
www.apexanalog.com
PA89U
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OCT 2012
5
PA89U REVM
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