INA125

INA ® INA1 125 INA125 25 INSTRUMENTATION AMPLIFIER With Precision Voltage Reference FEATURES q LOW QUIESCENT CURRENT: 460µA q PRECISION VOLTAGE REFERENCE: 1.24V, 2.5V, 5V or 10V q SLEEP MODE q LOW OFFSET VOLTAGE: 250µV max q LOW OFFSET DRIFT: 2µV/°C max q LOW INPUT BIAS CURRENT: 20nA max q HIGH CMR: 100dB min q LOW NOISE: 38nV/√ Hz at f = 1kHz q INPUT PROTECTION TO ±40V q WIDE SUPPLY RANGE Single Supply: 2.7V to 36V Dual Supply: ±1.35V to ±18V q 16-PIN DIP AND SO-16 SOIC PACKAGES VREFCOM 12 R VREFBG 13 R VREF2.5 14 2R VREF5 15 4R VREF10 16 4 10V VREFOut Ref Amp APPLICATIONS q PRESSURE AND TEMPERATURE BRIDGE AMPLIFIERS q INDUSTRIAL PROCESS CONTROL q FACTORY AUTOMATION q MULTI-CHANNEL DATA ACQUISITION q BATTERY OPERATED SYSTEMS q GENERAL PURPOSE INSTRUMENTATION V+ 1 INA125 SLEEP 2 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 (250µV), low offset drift (2µV/°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/...