FEATURES

LOW QUIESCENT CURRENT: 40μA/channel

Shut Down: < 1μA

HIGH GAIN ACCURACY: G = 5, 0.02%,

2ppm/°C

GAIN SET WITH EXTERNAL RESISTORS

LOW OFFSET VOLTAGE: ±200μV

HIGH CMRR: 94dB

LOW BIAS CURRENT: 10pA

BANDWIDTH: 500kHz, G = 5V/V

RAIL-TO-RAIL OUTPUT SWING: (V+) − 0.02V

WIDE TEMPERATURE RANGE:

−55°C to +125°C

SINGLE VERSION IN MSOP-8 PACKAGE AND

DUAL VERSION IN TSSOP-14 PACKAGE

APPLICATIONS

INDUSTRIAL SENSOR AMPLIFIERS:

Bridge, RTD, Thermistor, Position

PHYSIOLOGICAL AMPLIFIERS:

ECG, EEG, EMG

A/D CONVERTER SIGNAL CONDITIONING

DIFFERENTIAL LINE RECEIVERS WITH GAIN

FIELD UTILITY METERS

PCMCIA CARDS

COMMUNICATION SYSTEMS

TEST EQUIPMENT

AUTOMOTIVE INSTRUMENTATION

DESCRIPTION

The INA321 family is a series of rail-to-rail output,

micropower CMOS instrumentation amplifiers that offer

wide-range, single-supply, as well as bipolar-supply

operation. The INA321 family provides low-cost, low-noise

amplification of differential signals with micropower

current consumption of 40μA. When shutdown, the

INA321 has a quiescent current of less than 1μA.

Returning to normal operations within microseconds, the

shutdown feature makes the INA321 optimal for

low-power battery or multiplexing applications.

Configured internally for 5V/V gain, the INA321 offers

exceptional flexibility with user-programmable external

gain resistors. The INA321 reduces common-mode error

over frequency and with CMRR remaining high up to 3kHz,

line noise and line harmonics are rejected.

The low-power design does not compromise on bandwidth

or slew rate, making the INA321 ideal for driving sample

Analog-to-Digital (A/D) converters as well as

general-purpose applications. With high precision, low

cost, and small packaging, the INA321 outperforms

discrete designs, while offering reliability and

performance.