FEATURES
LOW QUIESCENT CURRENT: 460mA
PRECISION VOLTAGE REFERENCE:
1.24V, 2.5V, 5V or 10V
SLEEP MODE
LOW OFFSET VOLTAGE: 250mV max
LOW OFFSET DRIFT: 2mV/°C max
LOW INPUT BIAS CURRENT: 20nA max
HIGH CMR: 100dB min
LOW NOISE: 38nV/ÖHz at f = 1kHz
INPUT PROTECTION TO ±40V
WIDE SUPPLY RANGE
Single Supply: 2.7V to 36V
Dual Supply: ±1.35V to ±18V
16-PIN DIP AND SO-16 SOIC PACKAGES

APPLICATIONS
PRESSURE AND TEMPERATURE BRIDGE
AMPLIFIERS
INDUSTRIAL PROCESS CONTROL
FACTORY AUTOMATION
MULTI-CHANNEL DATA ACQUISITION
BATTERY OPERATED SYSTEMS
GENERAL PURPOSE INSTRUMENTATION

DESCRIPTION
The INA125 is a low power, high accuracy instrumentation
amplifier with a precision voltage reference. It
provides complete bridge excitation and precision differential-
input amplification on a single integrated
circuit.
A single external resistor sets any gain from 4 to
10,000. The INA125 is laser-trimmed for low offset
voltage (250mV), low offset drift (2mV/°C), and high
common-mode rejection (100dB at G = 100). It operates
on single (+2.7V to +36V) or dual (±1.35V to
±18V) supplies.
The voltage reference is externally adjustable with pinselectable
voltages of 2.5V, 5V, or 10V, allowing use
with a variety of transducers. The reference voltage is
accurate to ±0.5% (max) with ±35ppm/°C drift (max).
Sleep mode allows shutdown and duty cycle operation
to save power.
The INA125 is available in 16-pin plastic DIP and
SO-16 surface-mount packages and is specified for
the –40°C to +85°C industrial temperature range.