INA121U/2K5 Description

The INA121U/2K5 is a FET-input, low-power instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general-purpose applications. Low bias current (±4pA) allows use with high impedance sources. Gain can be set from 1V to 10,000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage.

INA121U/2K5 Features

LOW BIAS CURRENT: ±4pA

LOW QUIESCENT CURRENT: ±450µA

LOW INPUT OFFSET VOLTAGE: ±200µV

LOW INPUT OFFSET DRIFT: ±2µV/°C

LOW INPUT NOISE: 20nV/√Hz at f = 1kHz (G =100)

HIGH CMR: 106dB

WIDE SUPPLY RANGE: ±2.25V to ±18V

LOW NONLINEARITY ERROR: 0.001% max

INPUT PROTECTION TO ±40V

8-PIN DIP AND SO-8 SURFACE MOUNT

INA121U/2K5 Applications

LOW-LEVEL TRANSDUCER AMPLIFIERS: Bridge, RTD, Thermocouple

PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG, Respiratory

HIGH IMPEDANCE TRANSDUCERS

CAPACITIVE SENSORS

MULTI-CHANNEL DATA ACQUISITION

PORTABLE, BATTERY-OPERATED SYSTEMS

GENERAL PURPOSE INSTRUMENTATION