INA122

Features:

`LOW QUIESCENT CURRENT: 60A
`WIDE POWER SUPPLY RANGE
  Single Supply: 2.2V to 36V
  Dual Supply: 0.9/+1.3V to ±18V
`COMMON-MODE RANGE TO (V)0.1V
`RAIL-TO-RAIL OUTPUT SWING
`LOW OFFSET VOLTAGE: 250mV max
`LOW OFFSET DRIFT: 3V/ max
`LOW NOISE: 60nV Hz
`LOW INPUT BIAS CURRENT: 25nA max
`8-PIN DIP AND SO-8 SURFACE-MOUNT


Application

·PORTABLE, BATTERY OPERATED SYSTEMS
·INDUSTRIAL SENSOR AMPLIFIER: Bridge, RTD, Thermocouple
·PHYSIOLOGICAL AMPLIFIER: ECG, EEG, EMG
·MULTI-CHANNEL DATA ACQUISITION


Pinout




Specifications

Supply Voltage, V+ to V .................................................................... 36V
Signal Input Terminals, Voltage(2) ....................... (V)0.3V to (V+)+0.3V
                                     Current(2) ...................................................... 5mA
Output Short Circuit ................................................................. Continuous
Operating Temperature ................................................. 40 to +125
Storage Temperature..................................................... 55 to +125
Lead Temperature (soldering, 10s) ............................................... +300

NOTES: (1) Stresses above these ratings may cause permanent damage. (2) Input terminals are internally diode-clamped to the power supply rails. Input signals that can exceed the supply rails by more than 0.3V should be current-limited to 5mA or less.

Description

The INA122 is a precision instrumentation amplifier for accurate, low noise differential signal acquisition.

Its two-op-amp design provides excellent performance with very low quiescent current, and is ideal for portable instrumentation and data acquisition systems.

The INA122 can be operated with single power supplies from 2.2V to 36V and quiescent current is a mere 60mA. It can also be operated from dual supplies. By utilizing an input level-shift network, input commonmode range extends to 0.1V below negative rail (single supply ground).

A single external resistor of the INA122 sets gain from 5V/V to 10000V/V. Laser trimming provides very low offset voltage (250V max), offset voltage drift (3V/ max) and excellent common-mode rejection.

Package options of the INA122 include 8-pin plastic DIP and SO-8 surface-mount packages. Both are specified for the 40 to +85 extended industrial temperature range.