1
INA118
A
1
A
2
A
3
6
60k
60k
60k
60k
7
4
3
8
1
2
V
IN
V
IN
R
G
V+
V
INA118
Ref
V
O
G = 1 +
50k
R
G
+
5
Over-Voltage
Protection
25k
25k
Over-Voltage
Protection
FEATURES
q
LOW OFFSET VOLTAGE: 50
V max
q
LOW DRIFT: 0.5
V/
C max
q
LOW INPUT BIAS CURRENT: 5nA max
q
HIGH CMR: 110dB min
q
INPUTS PROTECTED TO
40V
q
WIDE SUPPLY RANGE:
1.35 to
18V
q
LOW QUIESCENT CURRENT: 350
A
q
8-PIN PLASTIC DIP, SO-8
DESCRIPTION
The INA118 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 (70kHz at G = 100).
A single external resistor sets any gain from 1 to 10,000.
Internal input protection can withstand up to
40V
without damage.
The INA118 is laser trimmed for very low offset voltage
(50
V), drift (0.5
V/
C) and high common-mode re-
jection (110dB at G = 1000). It operates with power
supplies as low as
1.35V, and quiescent current is only
350
A--ideal for battery operated systems.
The INA118 is available in 8-pin plastic DIP,
and SO-8 surface-mount packages, specified for
the 40
C to +85
C temperature range.
Precision, Low Power
INSTRUMENTATION AMPLIFIER
INA118
APPLICATIONS
q
BRIDGE AMPLIFIER
q
THERMOCOUPLE AMPLIFIER
q
RTD SENSOR AMPLIFIER
q
MEDICAL INSTRUMENTATION
q
DATA ACQUISITION
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
INA118
INA118
1994 Burr-Brown Corporation
PDS-1199D
Printed in U.S.A. April, 1998
SBOS027
2
INA118
INPUT
Offset Voltage, RTI
Initial
T
A
= +25
C
10
50/G
50
500/G
25
100/G
125
1000/G
V
vs Temperature
T
A
= T
MIN
to T
MAX
0.2
2/G
0.5
20/G
0.2
5/G
1
20/G
V/
C
vs Power Supply
V
S
=
1.35V to
18V
1
10/G
5
100/G
T
10
100/G
V/V
Long-Term Stability
0.4
5/G
T
V/mo
Impedance, Differential
10
10
|| 1
T
|| pF
Common-Mode
10
10
|| 4
T
|| pF
Linear Input Voltage Range
(V+) 1
(V+) 0.65
T
T
V
(V) + 1.1
(V)
+ 0.95
T
T
V
Safe Input Voltage
40
T
V
Common-Mode Rejection
V
CM
=
10V,
R
S
= 1k
G = 1
80
90
73
T
dB
G = 10
97
110
89
T
dB
G = 100
107
120
98
T
dB
G = 1000
110
125
100
T
dB
BIAS CURRENT
1
5
T
10
nA
vs Temperature
40
T
pA/
C
OFFSET CURRENT
1
5
T
10
nA
vs Temperature
40
T
pA/
C
NOISE VOLTAGE, RTI
G = 1000, R
S
= 0
f = 10Hz
11
T
nV/
Hz
f = 100Hz
10
T
nV/
Hz
f = 1kHz
10
T
nV/
Hz
f
B
= 0.1Hz to 10Hz
0.28
T
Vp-p
Noise Current
f=10Hz
2.0
T
pA/
Hz
f=1kHz
0.3
T
pA/
Hz
f
B
= 0.1Hz to 10Hz
80
T
pAp-p
GAIN
Gain Equation
1 + (50k
/R
G
)
T
V/V
Range of Gain
1
10000
T
T
V/V
Gain Error
G = 1
0.01
0.024
T
0.1
%
G = 10
0.02
0.4
T
0.5
%
G = 100
0.05
0.5
T
0.7
%
G = 1000
0.5
1
T
2
%
Gain vs Temperature
G = 1
1
10
T
10
ppm/
C
50k
Resistance
(1)
25
100
T
T
ppm/
C
Nonlinearity
G = 1
0.0003
0.001
T
0.002
% of FSR
G = 10
0.0005
0.002
T
0.004
% of FSR
G = 100
0.0005
0.002
T
0.004
% of FSR
G = 1000
0.002
0.01
T
0.02
% of FSR
OUTPUT
Voltage: Positive
R
L
= 10k
(V+) 1
(V+) 0.8
T
T
V
Negative
R
L
= 10k
(V) + 0.35
(V) + 0.2
T
T
V
Single Supply High
V
S
= +2.7V/0V
(2)
, R
L
= 10k
1.8
2.0
T
T
V
Single Supply Low
V
S
= +2.7V/0V
(2)
, R
L
= 10k
60
35
T
T
mV
Load Capacitance Stability
1000
T
pF
Short Circuit Current
+5/12
T
mA
FREQUENCY RESPONSE
Bandwidth, 3dB
G = 1
800
T
kHz
G = 10
500
T
kHz
G = 100
70
T
kHz
G = 1000
7
T
kHz
Slew Rate
V
O
=
10V, G = 10
0.9
T
V/
s
Settling Time, 0.01%
G = 1
15
T
s
G = 10
15
T
s
G = 100
21
T
s
G = 1000
210
T
s
Overload Recovery
50% Overdrive
20
T
s
POWER SUPPLY
Voltage Range
1.35
15
18
T
T
T
V
Current
V
IN
= 0V
350
385
T
T
A
TEMPERATURE RANGE
Specification
40
85
T
T
C
Operating
40
125
T
T
C
JA
80
T
C/W
INA118PB, UB
INA118P, U
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
SPECIFICATIONS
ELECTRICAL
At T
A
= +25
C, V
S
=
15V, R
L
= 10k
unless otherwise noted.
T
Specification same as INA118PB, UB.
NOTE: (1) Temperature coefficient of the "50k
" term in the gain equation. (2) Common-mode input voltage range is limited. See text for discussion of low power supply
and single power supply operation.
3
INA118
PIN CONFIGURATION
8-Pin DIP and SO-8
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.
ORDERING INFORMATION
PACKAGE
DRAWING
TEMPERATURE
PRODUCT
PACKAGE
NUMBER
(1)
RANGE
INA118P
8-Pin Plastic DIP
006
40
C to +85
C
INA118PB
8-Pin Plastic DIP
006
40
C to +85
C
INA118U
SO-8 Surface-Mount
182
40
C to +85
C
INA118UB
SO-8 Surface-Mount
182
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.
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
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.
R
G
V
IN
V
+
IN
V
R
G
V+
V
O
Ref
1
2
3
4
8
7
6
5
Top View
4
INA118
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE
Output Voltage (V)
Common-Mode Voltage (V)
0
5
4
3
2
1
0
1
2
3
4
5
G = 1
G = 2
G
10
V
D/2
+
+
V
CM
V
O
V
D/2
INA118
Ref
+5V
Single Supply
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
=
15V, unless otherwise noted.
GAIN vs FREQUENCY
60
50
40
30
20
10
0
10
20
Gain (dB)
Frequency (Hz)
1k
10k
100k
1M
10M
G = 100
G = 10
G = 1
G = 1000
COMMON-MODE REJECTION vs FREQUENCY
Frequency (Hz)
Common-Mode Rejection (dB)
1
10
1k
100k
100
140
120
100
80
60
40
20
0
10k
G=1
G=10
G=100
G=1000
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE
Output Voltage (V)
Common-Mode Voltage (V)
15
10
0
5
15
5
15
10
5
0
5
10
15
10
All
Gains
All
Gains
G = 1
G = 1
G
10
G
10
V
D/2
+
+
V
CM
V
O
V
D/2
INA118
Ref
15V
+15V
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE
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
All
Gains
All
Gains
G = 1
G = 1
G
10
G
10
V
D/2
+
+
V
CM
V
O
V
D/2
INA118
Ref
5V
+5V
INPUT COMMON-MODE RANGE
vs OUTPUT VOLTAGE
Output Voltage (V)
Common-Mode Voltage (V)
0
3
2
1
0
1
2
3
G = 1
G
10
V
D/2
+
+
V
CM
V
O
V
D/2
INA118
Ref
+3V
Single Supply
5
INA118
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
160
140
120
100
80
60
40
20
0
1
10
100
1k
10k
100k
G = 1000
G = 100
G = 10
G = 1
INPUT BIAS CURRENT
vs INPUT OVERLOAD VOLTAGE
10
8
6
4
2
0
2
4
6
8
10
Input Bias Current (mA)
Overload Voltage (V)
40
0
40
G = 1
G = 1
G = 1000
G = 1000
QUIESCENT CURRENT and SLEW RATE
vs TEMPERATURE
Temperature (C)
Quiescent Current (A)
500
400
300
200
75
50
25
0
25
50
75
100
125
1.5
1
0.5
0
Slew Rate (V/s)
Slew Rate
I
Q
V
S
= 15V
V
S
= 1.35V
SETTLING TIME vs GAIN
Gain (V/V)
Settling Time (s)
1000
100
10
1
10
100
1000
0.01%
0.1%
R
L
= 10k
C
L
= 100pF
INPUT- REFERRED NOISE VOLTAGE
vs FREQUENCY
Frequency (Hz)
Input-Referred Noise Voltage (nV/
Hz)
1
10
1k
100
1k
100
10
1
10k
G = 1
G = 10
100
10
1
0.1
Input Bias Current Noise (pA/
Hz)
Current Noise
(All Gains)
G = 100, 1000
G = 1000 BW Limit
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
Frequency (Hz)
Power Supply Rejection (dB)
160
140
120
100
80
60
40
20
0
10
100
1k
10k
100k
G = 1000
G = 100
G = 10
G = 1
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, V
S
=
15V, unless otherwise noted.
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