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® INA104
Very-High Accuracy
INSTRUMENTATION AMPLIFIER
FEATURES
q VERSATILE FOUR OP AMP DESIGN
q ULTRA-LOW VOLTAGE DRIFT:
0.25µV/°C, max
q LOW OFFSET VOLTAGE: 25µV, max
q LOW NONLINEARITY: 0.002%, max
q LOW NOISE: 13nV/Hz at f0 = 1kHz
q HIGH CMR: 106dB at 60Hz, min
q HIGH INPUT IMPEDANCE: 1010
q LOW COST
APPLICATIONS
q AMPLIFICATION OF SIGNALS FROM
SOURCES SUCH AS:
Strain Gages
Thermocouples
RTDs
q REMOTE TRANSDUCER AMPLIFIER
q LOW LEVEL SIGNAL CONDITIONER
q MEDICAL INSTRUMENTATION
14
Gain
18
Gain Sense
17
–In
20k
CMV Sense 4
5 20k
Gain
1
Gain Sense
2
+In
A1
A2
10k
26k
26k
10k
DESCRIPTION
The INA104 is a high accuracy, multistage, inte-
grated-circuit instrumentation amplifier designed for
signal conditioning requirements where very high per-
formance is desired.
A multiamplifier, monolithic design, which uses Burr-
Brown’s ultra-low drift, low-noise technology, pro-
vides the highest performance with maximum versatil-
ity at the lowest cost and makes the INA104 ideal for
even high volume applications.
Burr-Brown’s compatible thin-film resistors and laser-
trimming techniques are used for minimizing offset
voltage and temperature drift. This advanced tech-
nique also maximizes common-mode rejection and
gain accuracy.
The INA104 also contains a fourth operational ampli-
fier, specified separately, which can conveniently be
used for some important applications such as single
capacitor active low-pass filtering, easy output level
shifting, common-mode voltage active guard drive,
and increased gain (x 10,000 and greater).
A3 A4
Output Inverting Input
89
10k
10k
10k
12 A4 Summing
Junction
11 Feedback
Resistor
10
A3 A4 A4 Output
10k
5k
16 15
13
36
7
Offset Offset
Adjust Adjust
+VCC
–VCC Common
A4
Non-Inverting Input
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1983 Burr-Brown Corporation
PDS-488D
Printed in U.S.A. May, 1995

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SPECIFICATIONS—INSTRUMENTATION AMPLIFIER
At TA = +25°C, VS = ±15V power supply and in circuit of Figure 1 unless otherwise noted.
INA104AM
INA104BM, SM
INA104CM
PARAMETER
MIN TYP
MAX
MIN TYP
MAX MIN
TYP
MAX
UNITS
GAIN
Range of Gain
Gain Equation
Error From Equation, DC(1)
Gain Temp. Coefficient(2)
G=1
G = 10
G = 100
G = 1000
Nonlinearity, DC
1
RATED OUTPUT
Voltage
Current
Output Impedance
±10
±5
INPUT OFFSET VOLTAGE
Initial Offset at +25°C(3)
vs Temperature
vs Supply
vs Time
INPUT BIAS CURRENT
Initial Bias Current
(each input)
vs Temperature
vs Supply
Initial Offset Current
vs Temperature
INPUT IMPEDANCE
Differential
Common-Mode
INPUT VOLTAGE RANGE
Range, Linear Response
±10
CMR with 1kSource Imbalance
DC to 60Hz, G = 1
80
DC to 60Hz, G = 10
96
DC to 60Hz, G = 100 to 1000 106
INPUT NOISE
Input Voltage Noise
fB = 0.1Hz to 10Hz
Density, G = 1000
fO = 10Hz
fO = 100Hz
fO = 1kHz
Input Current Noise
fB = 0.01Hz to 10Hz
Density
fO = 10Hz
fO = 100Hz
fO = 1kHz
DYNAMIC RESPONSE
Small Signal, ±3dB Flatness
G=1
G = 10
G = 100
G = 1000
Small Signal, ±1% Flatness
G=1
G = 10
G = 100
G = 1000
Full Power, G = 1 - 100
Slew Rate, G = 1 - 100
Settling Time (0.1%)
G=1
G = 100
G = 1000
Settling Time (0.01%)
G=1
G = 100
G = 1000
0.2
G = 1 + (40k/RG)
±(0.08 –0.05/G)
1000
±(0.15 –0.1/G)
*
2
20
22
22
±(0.002 + 10–5G)
5
100
110
110
±(0.005 + 2 x 10–5G)
+11.5, –12.5
+11.5, –12.5
0.2
±25 ±200/G
±(1 + 50/G)
±(1 + 20/G)
±15
±0.2
±0.1
±5
±0.5
1010 || 3
1010 || 3
90
106
110
*
*
±50 ±400/G
±2 ±20/G
±30
±30
*
*
*
*
0.8
18
15
13
50
0.8
0.46
0.35
300
140
25
2.5
20
10
1
200
6.4
0.4 *
30 40
40 55
350 470
30 45
50 70
500 650
*
*
*
*
*
*
±(0.001
+ 10–5G)
*
*
*
*
*
*
±(0.002
+ 10–5G)
*
**
**
*
±10 ±100/G ±25 ±200/G
±0.75 ±10/G
*
*
±10 *
*
*
±2 *
*
*
*
*
**
**
**
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
**
**
**
**
**
**
**
*
*
*
–10
–11
–11
±(0.001
+ 10–5G)
* V/V
V/V
* %of FS
*
–50
–55
–55
±(0.002
+ 10–5G)
ppm/°C
ppm/°C
ppm/°C
ppm/°C
% of FS, p-p
*V
* mA
*
±10 ±100/G ±25 ±200/G
±0.25 ±10/G
*
*
µV
µV/°C
µV/V
µV/mo
±5 ±20 nA
* nA/°C
* nA/V
±2 ±20 nA
* nA/°C
* || pF
* || pF
V
* dB
* dB
* dB
* µV, p-p
* nV/Hz
* nV/Hz
* nV/Hz
* pA, p-p
* pA/Hz
* pA/Hz
* pA/Hz
* kHz
* kHz
* kHz
* kHz
* kHz
* kHz
* kHz
* Hz
* kHz
* V/µs
* * µs
* * µs
* * µs
* * µs
* * µs
* * µs
®
INA104
2

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SPECIFICATIONS—OUTPUT AMPLIFIER, A4
At TA = +25°C, VS = ±15V power supply and in circuit of Figure 1 unless otherwise noted.
INA104AM
INA104BM, SM
INA104CM
PARAMETER
MIN TYP
MAX
MIN TYP
MAX MIN
TYP
MAX
UNITS
OPEN-LOOP GAIN, VO = ±100
Rated Load RL 2k
100
RL 10k
110
RATED OUTPUT
Voltage at RL = 2k
RL = 10k
Current
10
5
Output Impedance
Load Capacitance
(Unity-Gain Inverting)
Short Circuit Current
FREQUENCY RESPONSE
Unity Gain, Small Signal
Full Power
Slew Rate
Settling Time (Unity-Gain)
0.1%
0.01%
0.35
INPUT OFFSET VOLTAGE
Initial, TA = +25°C
vs Temperature
INPUT BIAS CURRENT
INPUT IMPEDANCE
Differential
Common-Mode
RESISTORS, 10k
Accuracy
Drift
Ratio Match
Drift
INPUT VOLTAGE NOISE
fB = 0.1Hz to 10Hz
Density
fO = 10Hz
fO = 100Hz
fO = 1kHz
POWER SUPPLY
Rated Voltage
Voltage Range
Quiescent Current
±5
TEMPERATURE RANGE
Specification:
AM, BM, CM
SM
Operation:
AM, BM, CM, SM
Storage:
AM, BM, CM, SM
θJC
θJA
–25
–55
–55
–65
115
125
+13, –14.5
+13, –14.5
7.5
2
2000
10
1
9
0.55
37
40
±1
±5
+55
500
100
0.5
30
0.06
5
1.5
35
33
32
±15
±8.1
115
130
±2
+150
5
50
0.12
±20
±9.6
+85
+125
+125
+150
**
**
**
*
**
*
*
*
*
*
**
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
**
**
**
*
**
*
*
*
*
*
**
*
*
**
*
**
*
*
**
**
**
*
*
*
*
*
*
**
**
**
**
**
**
*
*
dB
dB
V
V
mA
k
pF
mA
MHz
kHz
V/µs
µs
µs
* mV
µV/°C
* nA
k
M
*%
* ppm/°C
*%
ppm/°C
µV, p-p
nVHz
nVHz
nVHz
V
*V
* mA
* °C
* °C
* °C
* °C
°C/W
°C/W
* Specifications same as for INA104AM.
NOTES: (1) Typically the tolerance of RG will be the major source of gain error. (2) Not including the TCR of RG. (3) Adjustable to zero at any one gain.
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.
®
3 INA104

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PIN CONFIGURATION
Top View
Gain Sense 1
+In 2
– Supply 3
Common-Mode
Voltage Sense
4
Gain 5
Common 6
Non-Inverting Input to A4 7
Output 8
Inverting Input to A4 9
DIP
18 Gain Sense
17 –In
16 Offset Adjust
15 Offset Adjust
14 Gain
13 +Supply
12 Summing Junction of A4
11 Feedback Resistor
10 Output of A4
ABSOLUTE MAXIMUM RATINGS
Supply ................................................................................................ ±20V
Internal Power Dissipation ............................................................. 980mW
Input Voltage Range ........................................................................... ±VCC
Output Short-Circuit (to ground) .............................................. Continuous
Operating Temperature ................................................. –40°C to +125°C
Storage Temperature ..................................................... –40°C to +125°C
Lead Temperature (soldering, 10s) ............................................... +300°C
ORDERING INFORMATION
MODEL
INA104AM
INA104BM
INA104CM
INA104SM
PACKAGE
18-Pin Hermetic DIP
18-Pin Hermetic DIP
18-Pin Hermetic DIP
18-Pin Hermetic DIP
TEMPERATURE
RANGE
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–55°C to +125°C
PACKAGE INFORMATION(1)
MODEL
PACKAGE
PACKAGE DRAWING
NUMBER
INA104AM
INA104BM
INA104CM
INA104SM
18-Pin Hermetic DIP
18-Pin Hermetic DIP
18-Pin Hermetic DIP
18-Pin Hermetic DIP
108
108
108
108
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
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.
®
INA104
USA OEM PRICES
MODEL
INA118P
INA118PB
INA118U
INA118UB
1-24
$5.40
8.10
5.40
8.10
25-99
$4.65
7.00
4.65
7.00
100+
$3.85
5.80
3.85
5.80
4

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TYPICAL PERFORMANCE CURVES
At TA = +25°C, VCC = 15V, and in circuit of Figure 1, unless otherwise specified.
0.01
GAIN NONLINEARITY vs GAIN
0.003
Max
0.001
Typ
0.0003
1
10 100
Gain (V/V)
1k
CMR vs SOURCE IMBALANCE
120 G = 100 - 1000
G = 100 - 1000
100
G = 10
G = 10
80 G = 1
G=1
60
40
1
60Hz
DC
10
Source Resistance Imbalance (kΩ)
100
3200
TOTAL OFFSET VOLTAGE DRIFTvs GAIN
320
32
3.2
1
AM
BM, SM
CM
10 100
Gain (V/V)
1k
120
G = 100, 1000
CMR vs FREQUENCY
G = 10
100
G=1
80
Balanced
Source
60
40
1
10 100 1k
Frequency (Hz)
10k
GAIN vs FREQUENCY
G = 1000
60
G = 100
40
G = 10
20
G=1
0
1% Error
10 100
1k
10k 100k
1M
Frequency (Hz)
100%
10%
1%
0.1%
0.01%
10
GAIN ERROR vs FREQUENCY
G = 1000
G = 100
G = 10
G=1
100 1k 10k
Frequency (Hz)
100k
®
5 INA104