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.