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®
INA141
INA141
INA141
Precision, Low Power, G = 10, 100
INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max
q LOW DRIFT: 0.5µV/°C max
q ACCURATE GAIN: ±0.05% at G = 10
q LOW INPUT BIAS CURRENT: 5nA max
q HIGH CMR: 117dB min
q INPUTS PROTECTED TO ±40V
q WIDE SUPPLY RANGE: ±2.25 to ±18V
q LOW QUIESCENT CURRENT: 750µA
q 8-PIN PLASTIC DIP, SO-8
APPLICATIONS
q BRIDGE AMPLIFIER
q THERMOCOUPLE AMPLIFIER
q RTD SENSOR AMPLIFIER
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
DESCRIPTION
The INA141 is a low power, general purpose instru-
mentation amplifier offering excellent accuracy. Its
versatile 3-op amp design and small size make it ideal
for a wide range of applications. Current-feedback
input circuitry provides wide bandwidth even at high
gain (200kHz at G = 100).
Simple pin connections set an accurate gain of 10 or
100V/V without external resistors. Internal input pro-
tection can withstand up to ±40V without damage.
The INA141 is laser trimmed for very low offset
voltage (50µV), drift (0.5µV/°C) and high common-
mode rejection (117dB at G = 100). It operates with
power supplies as low as ±2.25V, and quiescent
current is only 750µA—ideal for battery operated
systems.
The INA141 is available in 8-pin plastic DIP, and
SO-8 surface-mount packages, specified for the –40°C
to +85°C temperature range.
V+
7
VIN 2
G = 10
or
G =100
1
8
Over-Voltage
Protection
252
5050
252
VI+N 3
Over-Voltage
Protection
A1
25k
25k
A2
INA141
40k
40k
A3
40k
4
V–
40k
6
VO
5
Ref
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PDS-11297B
INA141
®

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SPECIFICATIONS
At TA = +25°C, VS = ±15V, and RL = 10kΩ, unless otherwise noted.
INA141P, U
INA141PA, UA
PARAMETER
CONDITIONS
MIN
INPUT
Offset Voltage, RTI
G = 100
G = 10
vs Temperature
G = 100
G = 10(2)
vs Power Supply
VS = ±2.25 to ±18V, G = 100
G = 10
Long-Term Stability
G = 100
G = 10
Impedance, Differential
Common-Mode
Common-Mode Voltage Range(1)
VO = 0V
Safe Input Voltage
Common-Mode Rejection
VCM = ±13V, RS = 1k
G = 100
G = 10
(V+) – 2
(V–) + 2
117
100
BIAS CURRENT
vs Temperature
Offset Current
vs Temperature
NOISE VOLTAGE, RTI
f = 10Hz
f = 100Hz
f = 1kHz
fB = 0.1Hz to 10Hz
f = 10Hz
f = 100Hz
f = 1kHz
fB = 0.1Hz to 10Hz
Noise Current
f = 10Hz
f = 1kHz
fB = 0.1Hz to 10Hz
GAIN
Gain Error
Gain vs Temperature(2)
Nonlinearity
G = 100, RS = 0
G = 10, RS = 0
VO = ±13.6V, G = 100
G = 10
G = 10, 100
G = 100
G = 10
OUTPUT
Voltage: Positive
Negative
Load Capacitance Stability
Short-Circuit Current
RL = 10k
RL = 10k
(V+) – 1.4
(V–) + 1.4
FREQUENCY RESPONSE
Bandwidth, –3dB
Slew Rate
Settling Time, 0.01%
Overload Recovery
G = 100
G = 10
VO = ±10V, G = 10
VO = ±5V, G = 100
G = 10
50% Overdrive
POWER SUPPLY
Voltage Range
Current, Total
TEMPERATURE RANGE
Specification
Operating
θJA 8-Pin DIP
SO-8 SOIC
VIN = 0V
±2.25
–40
–40
TYP
±20
±50
±0.2
±0.5
±0.4
±2
0.2
0.5
1010 || 2
1010 || 9
(V+) – 1.4
(V–) + 1.7
125
106
±2
±30
±1
±30
10
8
8
0.2
22
13
12
0.6
0.9
0.3
30
±0.03
±0.01
±2
±0.0005
±0.0003
(V+) – 0.9
(V–) + 0.9
1000
+6/–15
200
1
4
9
7
4
±15
±750
80
150
MAX
±50
±100
±0.5
±2
±1
±10
±40
±5
±5
±0.075
±0.05
±10
±0.002
±0.001
±18
±800
85
125
MIN
T
T
110
93
T
T
T
T
T
TYP
T
T
T
T
T
T
T
T
T
T
T
T
120
100
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T Specification same as INA141P, U.
NOTE: (1) Input common-mode range varies with output voltage—see typical curves. (2) Guaranteed by wafer test.
MAX
±125
±250
±1.5
±2.5
±3
±20
T
±10
±10
±0.15
±0.15
T
±0.004
±0.002
T
T
T
T
UNITS
µV
µV
µV/°C
µV/°C
µV/V
µV/V
µV/mo
µV/mo
|| pF
|| pF
V
V
V
dB
dB
nA
pA/°C
nA
pA/°C
nV/Hz
nV/Hz
nV/Hz
µVp-p
nV/Hz
nV/Hz
nV/Hz
µVp-p
pA/Hz
pA/Hz
pAp-p
%
%
ppm/°C
% of FSR
% of FSR
V
V
pF
mA
kHz
MHz
V/µs
µs
µs
µs
V
µA
°C
°C
°C/W
°C/W
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
INA141
2

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PIN CONFIGURATION
8-Pin DIP and SO-8
J1
V–IN 2
V+IN 3
V– 4
Top View
8J
7 V+
6 VO
5 Ref
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .................................................................................. ±18V
Analog Input Voltage Range ............................................................. ±40V
Output Short-Circuit (to ground) .............................................. Continuous
Operating Temperature ................................................. –40°C to +125°C
Storage Temperature ..................................................... –40°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
ORDERING INFORMATION
PRODUCT
INA141PA
INA141P
INA141UA
INA141U
PACKAGE
8-Pin Plastic DIP
8-Pin Plastic DIP
SO-8 Surface-Mount
SO-8 Surface-Mount
PACKAGE
DRAWING
NUMBER(1)
006
006
182
182
TEMPERATURE
RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
®
3 INA141

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TYPICAL PERFORMANCE CURVES
At TA = +25°C and VS = ±15V, unless otherwise noted.
GAIN vs FREQUENCY
60
50
40
G = 100V/V
30
20
G = 10V/V
10
0
–10
–20
1k
10k 100k 1M
Frequency (Hz)
10M
COMMON-MODE REJECTION vs FREQUENCY
140
G = 100V/V
120
G = 10V/V
100
80
60
40
20
0
10
100
1k
10k 100k
1M
Frequency (Hz)
140
120
100
80
60
40
20
0
10
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 10V/V
G = 100V/V
100 1k
10k 100k 1M
Frequency (Hz)
140
120
100
80
60
40
20
0
10
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 100V/V
G = 10V/V
100 1k 10k 100k 1M
Frequency (Hz)
15
10
5
0
–5
–10
–15
–15
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE, VS = ±15V
VD/2
VD/2
+
+
+
VCM
+15V
VO
Ref
–15V
–10 –5
0
5
Output Voltage (V)
10
15
5
4
3
2
1
0
–1
–2
–3
–4
–5
–5
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE, VS = ±5, ±2.5V
VS = ±5V
VS = ±2.5V
–4 –3 –2 –1 0 1 2
Output Voltage (V)
3
4
5
®
INA141
4

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TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C and VS = ±15V, unless otherwise noted.
INPUT- REFERRED NOISE vs FREQUENCY
1k
100
100
10
1
1
G = 10V/V
G = 100V/V
Current Noise
10 100 1k
Frequency (Hz)
10
1
0.1
10k
QUIESCENT CURRENT and SLEW RATE
vs TEMPERATURE
0.9 6
0.85
5
0.8
0.75
0.7
Slew Rate
IQ
4
3
2
0.65
–75 –50 –25
0 25 50
Temperature (°C)
1
75 100 125
INPUT OVER-VOLTAGE V/I CHARACTERISTICS
5
4
3
Flat region represents
2 normal linear operation.
1
0
G = 100V/V
G = 10V/V
–1
G = 10V/V
–2
–3 G = 100V/V
–4
–5
–50 –40 –30 –20 –10
+15V
INA141
VIN
IIN –15V
0 10 20 30 40
50
Input Voltage (V)
10
8
6
4
2
0
–2
–4
–6
–8
–10
0
INPUT OFFSET VOLTAGE WARM-UP
100 200 300 400 500
Time (µs)
INPUT BIAS CURRENT vs TEMPERATURE
2
1
IOS
0
IB
–1 Typical IB Range
±2nA at 25°C
–2
–75 –50 –25 0 25 50 75 100 125
Temperature (°C)
(V+)
(V+)–0.4
(V+)–0.8
(V+)–1.2
(V+)+1.2
(V–)+0.8
(V–)+0.4
V–
0
OUTPUT VOLTAGE SWING
vs OUTPUT CURRENT
123
Output Current (mA)
4
®
5 INA141