INA125 

INSTRUMENTATION AMPLIFIER With Precision Voltage Reference. 

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/°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.

FEATURES of INA125

• LOW QUIESCENT CURRENT : 460µA

• PRECISION VOLTAGE REFERENCE : 1.24V, 2.5V, 5V or 10V

• SLEEP MODE

• LOW OFFSET VOLTAGE : 250µV max

• LOW OFFSET DRIFT : 2µV/°C max

• LOW INPUT BIAS CURRENT : 20nA max

• HIGH CMR: 100dB min

• LOW NOISE: 38nV/√Hz 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

Application of INA125

• PRESSURE AND TEMPERATURE BRIDGE AMPLIFIERS

• INDUSTRIAL PROCESS CONTROL

• FACTORY AUTOMATION

• MULTI-CHANNEL DATA ACQUISITION

• BATTERY OPERATED SYSTEMS

• GENERAL PURPOSE INSTRUMENTATION