Dual, Low Power, G = 10, 100 Instrumentation Amplifier
1995 Burr-Brown Corporation
PDS-1244C
Printed in U.S.A. January, 1996
FEATURES
q
LOW OFFSET VOLTAGE: 50
V max
q
LOW DRIFT: 0.5
V/
C max
q
EXCELLENT GAIN ACCURACY:
0.05% max at G = 10
q
LOW INPUT BIAS CURRENT: 5nA max
q
HIGH CMR: 117dB min (G = 100)
q
INPUTS PROTECTED TO
40V
q
WIDE SUPPLY RANGE:
2.25V to
18V
q
LOW QUIESCENT CURRENT: 750
A/IA
q
16-PIN PLASTIC DIP, SOL-16
DESCRIPTION
The INA2141 is a low power, dual instrumentation
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 INA2141 is laser trimmed for very low offset
voltage (50
V), drift (0.5
V/
C) and high common-
mode rejection (117dB at G = 100). It operates with
power supplies as low as
2.25V, and quiescent cur-
rent is only 750
A per amplifier--ideal for battery
operated systems.
Packages are 16-pin plastic DIP, and SOL-16
surface-mount, specified for the 40
C to +85
C
temperature range.
Dual, Low Power, G = 10, 100
INSTRUMENTATION AMPLIFIER
APPLICATIONS
q
SENSOR AMPLIFIER
THERMOCOUPLE, RTD, BRIDGE
q
MEDICAL INSTRUMENTATION
q
MULTIPLE CHANNEL SYSTEMS
INA2141
A1A
A2A
A3A
40k
40k
40k
40k
V
INA
V
INA
G = 10
or
100
V+
V
INA2141
Ref
V
OA
+
Over-Voltage
Protection
25k
25k
Over-Voltage
Protection
A1B
A2B
A3B
40k
40k
40k
40k
V
INB
V
INB
Ref
V
OB
+
Over-Voltage
Protection
25k
25k
Over-Voltage
Protection
G = 10
or
100
5050
252
252
252
252
5050
1
3
4
2
16
14
13
15
7
6
5
10
11
12
8
9
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
INA2141
INA2141
SBOS036
INA2141
2
SPECIFICATIONS
At T
A
= +25
C, V
S
=
15V, and R
L
= 10k
, unless otherwise noted.
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.
INA2141P, U
INA2141PA, UA
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
T
Specification same as INA2141P, U.
NOTE: (1) Input common-mode range varies with output voltage--see typical curves. (2) Guaranteed by wafer test.
INPUT
Offset Voltage, RTI
G = 100
20
50
T
125
V
G = 10
50
100
T
250
V
vs Temperature
G = 100
0.2
0.5
T
1.5
V/
C
G = 10
(2)
0.5
2
T
5
V/
C
vs Power Supply
V
S
=
2.25 to
18V, G = 100
1
2
T
5
V/V
G = 10
2
10
T
20
V/V
Long-Term Stability
G = 100
0.2
T
V/mo
G = 10
0.5
T
V/mo
Impedance, Differential
10
10
|| 2
T
|| pF
Common-Mode
10
10
|| 9
T
|| pF
Common-Mode Voltage Range
(1)
V
O
= 0V
(V+) 2
(V+) 1.4
T
T
V
(V)
+ 2
(V)
+ 1.7
T
T
V
Safe Input Voltage
40
T
V
Common-Mode Rejection
V
CM
=
13V,
R
S
= 1k
G = 100
117
125
110
120
dB
G = 10
97
106
93
100
dB
BIAS CURRENT
2
5
T
10
nA
vs Temperature
30
T
pA/
C
Offset Current
1
5
T
10
nA
vs Temperature
30
T
pA/
C
NOISE VOLTAGE, RTI
f = 10Hz
G = 100, R
S
= 0
10
T
nV/
Hz
f = 100Hz
8
T
nV/
Hz
f = 1kHz
8
T
nV/
Hz
f
B
= 0.1Hz to 10Hz
0.2
T
Vp-p
f = 10Hz
G = 10, R
S
= 0
22
T
nV/
Hz
f = 100Hz
13
T
nV/
Hz
f = 1kHz
12
T
nV/
Hz
f
B
= 0.1Hz to 10Hz
0.6
T
Vp-p
Noise Current
f = 10Hz
0.9
T
pA/
Hz
f = 1kHz
0.3
T
pA/
Hz
f
B
= 0.1Hz to 10Hz
30
T
pAp-p
GAIN
Gain Error
V
O
=
13.6V, G = 100
0.03
0.075
T
0.15
%
G = 10
0.01
0.05
T
0.15
%
Gain vs Temperature
(2)
G = 10, 100
2
10
T
T
ppm/
C
Nonlinearity
G = 100
0.0005
0.002
T
0.004
% of FSR
G = 10
0.0003
0.001
T
0.002
% of FSR
OUTPUT
Voltage: Positive
R
L
= 10k
(V+) 1.4
(V+) 0.9
T
T
V
Negative
R
L
= 10k
(V) + 1.4
(V) + 0.9
T
T
V
Load Capacitance Stability
1000
T
pF
Short-Circuit Current
+6/15
T
mA
FREQUENCY RESPONSE
Bandwidth, 3dB
G = 100
200
T
kHz
G = 10
1
T
MHz
Slew Rate
V
O
=
10V, G = 10
4
T
V/
s
Settling Time, 0.01%
V
O
=
5V, G = 100
9
T
s
G = 10
7
T
s
Overload Recovery
50% Overdrive
4
T
s
POWER SUPPLY
Voltage Range
2.25
15
18
T
T
T
V
Current, Total
V
IN
= 0V
1.5
1.6
T
T
mA
TEMPERATURE RANGE
Specification
40
85
T
T
C
Operating
40
125
T
T
C
JA
80
T
C/W
3
INA2141
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate 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.
PIN CONFIGURATION
Top View
DIP
SOL-16
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
ABSOLUTE MAXIMUM RATINGS
V
INA
V
INA
J
A
J
A
V
INB
V
INB
J
B
J
B
1
2
3
4
Ref
A
V
OA
Sense
A
V
5
6
7
8
16
15
14
13
Ref
B
V
OB
Sense
B
V+
12
11
10
9
+
+
ORDERING INFORMATION
PACKAGE
DRAWING
TEMPERATURE
PRODUCT
PACKAGE
NUMBER
(1)
RANGE
INA2141PA
16-Pin Plastic DIP
180
40
C to +85
C
INA2141P
16-Pin Plastic DIP
180
40
C to +85
C
INA2141UA
SOL-16 Surface-Mount
211
40
C to +85
C
INA2141U
SOL-16 Surface-Mount
211
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.
INA2141
4
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, and V
S
=
15V, unless otherwise noted.
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
140
120
100
80
60
40
20
0
10
100
1k
10k
100k
1M
G = 100V/V
G = 10V/V
GAIN vs FREQUENCY
60
50
40
30
20
10
0
10
20
Gain (dB)
Frequency (Hz)
1k
10k
100k
1M
10M
G = 100V/V
G = 10V/V
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE, V
S
= 15V
Output Voltage (V)
Common-Mode Voltage (V)
15
10
0
5
15
5
15
10
5
0
5
10
15
10
V
D/2
+
+
V
CM
V
O
V
D/2
Ref
15V
+15V
+
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
140
120
100
80
60
40
20
0
10
100
1k
10k
100k
1M
G = 100V/V
G = 10V/V
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE, V
S
= 5, 2.5V
Output Voltage (V)
Common-Mode Voltage (V)
5
5
4
3
2
1
0
1
2
3
4
5
4
3
2
1
0
1
2
3
4
5
V
S
= 5V
V
S
= 2.5V
COMMON-MODE REJECTION vs FREQUENCY
Frequency (Hz)
Common-Mode Rejection (dB)
10
100
10k
1M
1k
140
120
100
80
60
40
20
0
100k
G = 10V/V
G = 100V/V
5
INA2141
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, and V
S
=
15V, unless otherwise noted.
INPUT- REFERRED NOISE vs FREQUENCY
Frequency (Hz)
Input-Referred Voltage Noise (nV/
Hz)
1
10
1k
100
1k
100
10
1
10k
G = 10V/V
100
10
1
0.1
Input Bias Current Noise (pA/
Hz)
Current Noise
G = 100
CROSSTALK vs FREQUENCY
Frequency (Hz)
Crosstalk (dB)
10
100
10k
1M
1k
140
120
100
80
60
40
20
0
100k
G = 10V/V
G = 100V/V
OFFSET VOLTAGE WARM-UP
10
8
6
4
2
0
2
4
6
8
10
0
10
20
30
40
50
Time (ms)
Offset Voltage Change (V)
G = 100V/V
QUIESCENT CURRENT and SLEW RATE
vs TEMPERATURE
Temperature (C)
Quiescent Current (A)
1.8
1.7
1.6
1.5
1.4
1.3
6
5
4
3
2
1
75
50
25
0
25
50
75
100
125
Slew Rate (V/s)
I
Q
Slew Rate
INPUT OVER-VOLTAGE V/I CHARACTERISTICS
5
4
3
2
1
0
1
2
3
4
5
Input Current (mA)
Input Voltage (V)
50
40
30
20
10
10
20
30
40
0
50
G = 10V/V
G = 10V/V
G = 100V/V
G = 100V/V
V
IN
I
IN
15V
+15V
INA2141
1/2
Flat region represents
normal linear operation.
INPUT BIAS CURRENT vs TEMPERATURE
2
1
0
1
2
75
50
25
0
25
50
75
100
125
Temperature (C)
Input Bias Current (nA)
I
OS
I
B
Typical I
B
and I
OS
Range 2nA at 25C
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