INA2322| Datasheet

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INA

322

INA322 INA2322

SBOS174B DECEMBER 2000 REVISED FEBRUARY 2006

microPower, Single-Supply, CMOS INSTRUMENTATION AMPLIFIER
FEATURES
q LOW COST q LOW QUIESCENT CURRENT: 40uA/channel Shut Down: < 1uA q HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/ C q GAIN SET WITH EXTERNAL RESISTORS q LOW BIAS CURRENT: 10pA q BANDWIDTH: 500kHz, G = 5V/V q RAIL-TO-RAIL OUTPUT SWING: (V+) 0.02V q WIDE TEMPERATURE RANGE: 55 C to +125 C q SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE

APPLICATIONS
q INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position q PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG q A/D CONVERTER SIGNAL CONDITIONING q DIFFERENTIAL LINE RECEIVERS WITH GAIN q FIELD UTILITY METERS q PCMCIA CARDS q COMMUNICATION SYSTEMS q TEST EQUIPMENT q AUTOMOTIVE INSTRUMENTATION

DESCRIPTION
The INA322 family is a series of low cost, rail-to-rail output, micropower CMOS instrumentation amplifiers that offer widerange, single-supply, as well as bipolar-supply operation. The INA322 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40uA. When shutdown the INA322 has a quiescent current of less than 1uA. Returning to normal operations within microseconds, the shutdown feature makes the INA322 optimal for low-power battery or multiplexing applications.
R1 160k REF
A1

Configured internally for 5V/V gain, the INA322 offers exceptional flexibility with user-programmable external gain resistors. The INA322 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 INA322 ideal for driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA322 outperforms discrete designs, while offering reliability and performance.
RG 160k R2

40k

VIN VIN+

A3 A2

VOUT

Gain = 5 + 5(R2/R1) VOUT = (VIN+ VIN ) Gain

Shutdown

V+

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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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