FEATURES
l LOW OFFSET VOLTAGE: 50μV max
l LOW DRIFT: 0.5μV/°C max
l LOW INPUT BIAS CURRENT: 5nA max
l HIGH CMR: 110dB min
l INPUTS PROTECTED TO ±40V
l WIDE SUPPLY RANGE: ±1.35 to ±18V
l LOW QUIESCENT CURRENT: 350μA
l 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
(50μV), drift (0.5μV/°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
350μA—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.
APPLICATIONS
l BRIDGE AMPLIFIER
l THERMOCOUPLE AMPLIFIER
l RTD SENSOR AMPLIFIER
l MEDICAL INSTRUMENTATION
l DATA ACQUISITION

A1
A2
A3
6
60k? 60k?
60k? 60k?
7
4
3
8
1
2
VIN
VIN
RG
V+
V–
INA118
Ref
VO
G = 1 + 50k?
RG
–
+
5
Over-Voltage
Protection
25k?
25k?
Over-Voltage
Protection