MN7130 LLJ! ~
Available at Surplus Sales
MN7130
MULTIPLEXED
TRACK-HOLD
AMPLIFIER
LLJ!
~ MICRO NETWORKS
DESCRIPTION
FEATURES
MN7130 is a thin-film hybrid circuit containing two 8~channel
multiplexers, a true instrumentation amplifier and a track-hold
amplifier. This unique circuit is extremely versatile and can be
used in conjunction with any of Micro Networks analog-to-digital
converters to configure a complete, 16-channel (8 full differential) data acquisition system in as few as 2 dual-in-line
packages occupying as little as 4 square inches of board space.
Additionally, MN7130 can be used in any analog system for applications requiring the analog acquisition of multiple channels.
• Complete DAS Front End:
2 8-Channel Multiplexers
Instrumentation Amp
Track-Hold Amp
• Small 32-Pin DIP
• 12-Bit linearity
• 16 Single-Ended or 8
Differential Input Channels
• 10µsec Maximum
Acquisition Time
to ±0.01% (20V Step)
• Low Droop Rate
±7µV/µ5ec Maximum
• Full Mil Operation
-55°C to +125°C
• MIL-H-38534 Screening
Optional. MIL-STD-1772
Qualified Facility
MN7130 has a maximum acquisition time of 10µsec (20V step to
±0.010/oFSR) when the multiplexer, instrumentation amplifier
and track-hold are serially connected , and a typical droop rate
of ±4µV/µ5ec. The internal multiplexer may be connected for
single-ended or 8 full differential input channels and is directly
addressable in binary. The digital inputs are CMOS compatible,
and analog inputs up to ±10V can be accommodated. For additional flexibility, all inputs and outputs of the internal subsections are available at the device pins. The standard device is fully specified for either 0°C to + 70°C or -55°C to + 125°C (H
model) operation. The MN7130H/B is available with Environmental Stress Screening while the MN7130H/B CH is fully
screened in accordance with MIL-H-38534.
32 PIN DIP
169!.t4::i.l)~J
, 1J5 1o on
1!,,1)) (38,0,
i
MN7130 was specifically designed to fill the need for a small ,
low-cost data acquisition system that was physically and electrically compatible with current microprocessor technology.
When used with a 12-bit AID, the approach eliminates the need
for special mountings and connectors, saves space, facilitates
maintenance, and reduces costs. In addition, MN7130 allows
standard board spacing, improves reliability and offers significant weight savings in aerospace and avionics applications.
-+_j
j 0016 j040&)
0020 (0 ';()8)
I
Qj:gil0Jl2J
0012(0305)
I
f-
'
0600( 1524)
~
Dimensions in Inches
(millimeters)
[11]
-
January 1992
Copyright 1992
MICRO NETWORKS
Micro Networks
All rights reserved
324 Clark St . Worcester, MA 01606 (508) 852-5400
9-9
MN7130 MULTIPLEXED TRACK-HOLD AMPLIFIER
ABSOLUTE MAXIMUM RATINGS
Operating Temperature Range
Specified Temperature Range:
MN7130
MN7130H, H/B
Storage Temperature Range
Positive Supply (+Vee, Pin 24)
Negative Supply ( - Vee, Pin 23)
Multiplexer Inputs (Pins 1-16)
Instrumentation Amp Inputs (Pins 21 , 22)
T/H Amplifier Input (Pin 19)
Address Inputs (Pins 27-31)
T/H Command (Pin 17)
Multiplexer Outputs (Pins 26, 32)
Instrumentation Amp Output (Pin 20)
TIH Amplifier Output (Pin 18)
ORDERING INFORMATION
- 55·c to + 125•c
PART NUMBER
o·cto + 1o·c
-55°C to + 125•c
-65°C to + 1so•c
Oto + 16 Volts
0 to -16 Volts
-Vee to + Vee
± 15 Volts
0 to ± Vee Volts
- 0.3 to + Vee Volts
Oto+ 7 Volts
±20mA
±25mA
S.C. Protected to Ground
MN7130/H/B CH
11
8""dMd
" " is sp,c,ied
o•c to +70°C
operation.fo,
Add "H". for specified -55°C to +125°C
operation . - - - - - - - Add "/B" to " H" models for
Environmental Stress Screening .
Add " CH" to " /B" models for 100%
screening according to MIL-H-38534.
SYSTEM SPECIFICATIONS (TA= +25°C, ±Vee= ± 15V, unless otherwise indicated) (Note 1)
I
ANALOG INPUT (Multiplexer Inputs)
Voltage Range: Single-Ended
Differential
Common Mode
MIN.
TYP.
±10
±10
±10
±12
Input Impedance
±15
70
UNITS
Volts
Volts
Volts
250//100
Input Current
Common Mode Rejection Ratio
MAX.
M{lf/pF
±30
80
nA
dB
DIGITAL INPUTS (Mux Address, T/H Command)
Logic Levels : Mux Address: Logic "1"
Logic " O"
TIH Command: Logic "1"
Logic "O"
+4.0
+0.8
+2.4
+0.8
Logic Currents: Mux Address (Note 2):
Logic " 1" (V1H = + 5.0V)
I
Logic " O" (V1L = + O.OV)
II
T/H Command: Logic "1" (V1H = + 2.4V)
Logic "O" (V1L = + 0.4V)
±10
±10
±10
±10
Volts
Volts
Volts
Volts
µA
µA
µA
µA
ANALOG OUTPUT (T/H Amplifier)
Output Voltage
±10
Output Current
±2
Volts
mA
Output Load Capacitance
50
pF
TRANSFER CHARACTERISTICS
Gain
Gain Error (Note 3): Initial ( + 25 •c)
Over Temperature (Note 4)
Gain Linearity Error (Note 5)
±2
±4
Offset Change (Pedestal, Hold Mode)
Over Temperature (Note 4)
±15
9-10
±0.2
±0.002
Offset Voltage (Track Mode): Initial ( +25°C)
Over Temperature (Note 4)
Droop Rate: +25°C
O'C to + 70'C
-55 °C to+ 125'C
VN
+1
±0.1
±0.1
±4
%
%
%FSA
±6
mV
mV
mV
±7
± 10
±40
µVlµsec
µVlµsec
µVlµsec
DYNAMIC CHARACTERISTICS
TYP.
MIN.
UNITS
MAX.
Large Signal Bandwidth
250
kHz
Output Slew Rate
±20
V/µsec
Acquisition Time (20V step to ± 0.01 %)
6.5
10
Aperture Delay
200
400
nsec
Settling Time, Track-to-Hold to ± 1.0mV
0.5
2
µsec
Feedthrough (Hold Mode) @ 1kHz
Transients Peak Amplitude: Track-to-Hold
Hold-to-Track
µSec
± 0.01
%
90
100
mV
mV
POWER SUPPLIES
+15
-15
+ 15.45
-15.45
Volts
Volts
Current Drains: + 15V Supply
-15V Supply
+30
-30
+40
- 40
mA
mA
Power Consumption
900
1200
mW
Power Supply Range: + 15V Supply
-15V Supply
+ 14.55
-14.55
SPECIFICATION NOTES:
1. System specificati ons listed reflect system performance with all elements
serially connected.
2. If the multiplexer inputs are to be driven frc,m standard TIL logic, 1k!l pullup
resistors to + 5V should be connected.
3. Gain error is defined as the error in the slope of the systems input,ou tput
transfer function and is expressed in percen t.
4. MN7130 is specified tor 0°C to + 70°C operation. MN7130H and
MN7130H/B are specified for -55°C to + 125°C operation.
5. Gain linearity error is defined as the maximum deviation from the best -fit
straight line approximation to the system's input-output transfer function
and is expressed as a percentage of the system's full scale volt age swing
(FSA).
BLOCK DIAGRAM
Multiplexer
Output s
MUX 1
(32)
MUX 2
(26)
Instrumentation
Amplifier
- In
ln st rum eniation
Ampl1lier
Output
+ In
(21)
(20}
(22}
TIH
Ampl ifier
lnpu1
(19)
MUX 1 Enable (3 1)
(1)
(2)
(3)
Analog Inputs
(4)
(5)
[
(6)
(7)
(6)
~ - - -, 118)
T/H
Amplifier
OJtpul
M UX 2 Enable (27}
(1~:
l~~:
(11)
Analog Inputs
[
Channel
Address
Inputs
(A2
(U)
(15)
(1 6 )
L-f
+--------0
C,_
= IOOpF
(24)
+ 15V Supply ( + Vccl
~ - -- ---0 125) Ground
+--------0 {23) -
15V Supply ( - Vee)
(26)
A1 (2 9 ) 0 - - - - - - ~
AO(JO)O------~
T I H C o m m a n d ( 1 7 } 0 - - - - - - - - - - - - - - - - --
--iC>>-----------~
9-11
I
PIN DESIGNATIONS
•
32
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN 1
ChannelO
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Channel 9
Channel 10
Channel 11
Channel 12
Channel 13
Channel 14
Channel 15
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
Mux 1 Output
Mux 1 Enable
A0 M ux Address
A 1 Mux Address
A2 Mux Address
Mux 2 Enable
Mux 2 Output
Ground
+ 15V Supply (+Vee)
- 15V Supply (- Vccl
- In (Instrumentation Amplifier)
+ In (Instrumentation Amplifier)
Instrumentation Amplifier Output
T/H Amplifier Input
T/H Amplifier Output
T/H Command
APPLICATIONS INFORMATION
DESCRIPTION OF OPERATION-MN7130 is a complete data
acquisition system front end containing user-configurable
components (multiplexers, instrumentation amplifier and
track-ho!d amplifier).
In order to preserve maximum flexibility, all inputs and outputs of the subsections are available at the device pins. The
internal 8-channel multiplexers can be connected for 16
single-ended or8 fully differential input operation and may be
directly addressed via three address lines and two mux
enable lines. The internal instrumentation amplifier offers
high input impedance (250M0/100pF) and 70dB common
mode rejection ratio. The internal track-hold amplifier completes this analog front-end function allowing dynamic input
signals to be acquired and then held for analog-to-digital
conversion.
MN7130 can be used in conjunction with MN574A i'P-compatible 12-bit A/D converters to configure a complete and inexpensive, 16-channel, 12-bit µ.P-compatible DAS capable of
28,000 channels/sec throughput rates in a minimum of board
space. Substituting MN5240 for MN574A increases throughput to 60,000 channels/sec.
LAYOUT CONSIDERATIONS-Proper attention to layout and
decoupling is necessary to obtain specified performance
from the MN7130. The unit's ground pin(pin25) should be tied
to system analog ground as close to the unit as possible,
preferably through a large analog ground plane underneath
the package.
Coupling between analog inputs and digital signals should
be minimized to avoid noise pick-up. Care should be taken to
avoid long runs or analog runs close to digital lines.
Power supply connections should be short and direct, and all
power supplies should be decoupled with high-frequency bypass capacitors to ground. 1µ.F tantalum capacitors in parallel with 0.01µ.F ceramic capacitors are the most effective
combination. Single 1µ.F ceramic capacitors can be used if
necessary to save board space.
Pin24 o
1µF
I I
1 1
+15V
1µF
9-12
T I
-
Approximately 1µ.sec access time should be allowed after addressing before the analog outputs of the multiplexer are
used. A particular point to note is the minimum logic "1" for
the multiplexer inputs is + 4.0V. If the multiplexer inputs are
to be driven from standard TIL logic, 1k0 pullup resistors to
+ 5V should be used.
The following diagrams show typical connections for both full
differential and single-ended applications along with truth
tables which demonstrate multiplexer address (A 0, A 1, A2)
and enable (Mux 1 Enable, Mux 2 Enable) line functions.
MN7130 is specified and tested as a system (all elements
serially connected). Typical specifications for the multiplexer
and instrumentation amplifier appear below.
Typical Mux Perfonnance Specifications
Numbers of Channels
Input Voltage Range
Input Impedance
0 .01µF
0 .01µF
-15V
16 Single-Ended
8 Full Differential
±10V
250M0/100pF
Logic Levels: Logic "1" (min.)
Logic "O" (max.)
+4.0V
+0.8V
Logic Currents: Logic "1"
Logic " O"
±10µA
± 10µA
Access Time
On Resistance
Cross Talk (1 k!l Source, 1kHz, 20vp-p)
Pin 25 o---,f-----1--- Ground
Pin23 o
MULTIPLEXER-INSTRUMENTATION AMPLIFIER-The multiplexer section of the MN7130 is addressed with a three or
four bit binary word and can be configured for 8 full differential inputs or 16 single-ended inputs. The use of differential inputs provides high rejection of common mode noise and
elimination of ground return offsets. Differential inputs must
be used when both sides of the input signal are off ground.
Connections and truth tables for both modes of operation are
shown on the following pages.
500nsec
2k!l
-68dB
Typical Instrumentation Amplifier
Performance Specifications
±10V
Voltage Range
250M{)J100pF
Input Impedance
Input Current (max.)
±30nA
As stated earlier, the MN7130 is specified and tested as a system (all elements serially connected). Typical T/H amplifier
specifications are listed below.
Typical T/H Amplifier
Performance Specifications
Common Mode Rejection Ratio (min.)
70dB
Voltage Range
Gain
+1VN
Input Impedance
Gain Error: Initial ( + 25 •c)
Over Temperature
±0.02%
±0.05%
Input Bias Current
±15nA
Logic Levels: Logic " 1" (min.)
Logic "O" (max.)
+2.4V
+0.8V
Logic Currents: Logic " 1"
Logic " O"
± 10µA
±10µA
Gain Nonlinearity
±0.002%
Large Signal Bandwidth
250kHz
±20V/µsec
Output Slew Rate
4µsec
Settling Time (20V Step to ±0.010/o)
Output Voltage Swing (min.)
±10V
Output Current (min.)
±2mA
Output Load Capacitance (max.)
50pF
TRACK-HOLD AMPLIFIER- The track-hold amplifier is in the
hold mode when the T/H command is a logic "1" and in the
sample mode when the T/H command is a logic "O". A total of
10µsec should be allowed after addressing the multiplexer
before the T/H is commanded to the hold mode to allow for
full scale (20V) changes. Maximum acquisition times for changes
less than full scale are shown on the following page.
In data acquisition applications, the T/H command input can
usually be driven directly from the A/D converter Status
(E.O.C.) output.
±10V
10"{)
Gain
+1VN
Gain Nonlinearity: Initial ( + 25 •c)
Over Temperature
±0.002%
±0.005%
Offset Voltage (Track Mode): Initial ( + 25 •c)
Over Temperature
±2mV
±4mV
Offset Change (Pedestal, Hold Mode}
Over Temperature
±15mV
Droop Rate: Initial (25•c) (max.)
0 ·c to + 70 •c (max.)
- 55 ·c to + 125 ·c (max.)
± 7µVlµsec
± 10µV/µsec
± 40µV/µ.sec
Acquisition Time (20V Step to ± 0.01 %} (max.)
10µsec
Aperture Time (max.)
400nsec
Feedthrough (Hold Mode)@ 1kHz
±0.01%
Transients Peak Amplitude: Track·to,Hold
Hold·to,Track
90mV
100mV
MULTIPLEXER CONNECTIONS and ADDRESSING
16 Single Ended Input Channels
Enable Inputs
Address Inputs
A2
MUX2
''"
Ou tp u1
(26 )
12 11
I~
Cn annel
Addre ss
Inpu t s
~A~::<>------'
Az(
AJ
2810
_ _ _ _ _..J
(31 )
MU >l. 1
On Channel
A1
Ao
MUX1
X
X
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
10
11
1
1
1
1
12
13
14
15
X
X
X
X
0
0
0
0
0
0
0
1
1
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
0
1
1
1
1
0
0
0
0
1
1
1
0
0
0
0
,
1
1
1
1
,
0
1
1
,
MUX2
ILLEGAL
NONE
0
1
2
3
4
5
I
6
7
B
9
Enable
Logic "1" > + 4.0V
Logic "O" < + a.av
9-13
8 Differential Input Channels
MUX2
Ou tpu l
,,.,
Enable Inputs
Address Inputs
131)
MUX I
Enable
On Channel
Ao
MUX1
X
X
X
0
1
X
1
X
X
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
0
0
1
4
1
1
0
1
1
1
1
1
1
1
5
6
A2
A1
X
X
X
1
1
1
1
MUX2
ILLEGAL
ILLEGAL
NONE
0
1
1
1
2
3
1
7
Logic " 1" > + 4.0V
Logic ''O" < + 0.8V
127)
MUX2
Enilble
•5V 0 - - - - - - - - - + - - - - '
MN7130
Acquisition Time
vs. Output Swing
MN7130
Common Mode Rejection
vs. Frequency
I
1 k0
1()()
--
80
Acquisition
Time {µsec)
ij
l>
a:
:E
60
0
\0
40
o.5"/o
I"-.
"-
~
-
20
1.0
10
20
10.0
0. 1k
10k
10k
100k
Common Mode Input Frequency (Hz)
Output Swing (Volts)
~
MICRO NETWORKS
324 Clark St. . Worcesler. MA 01 606 (508) 852-5400
9-14
-
I
2 ~
15
I
Sourc e
Im balance
-
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