'Instrumentation' related articles 1

  1. 2009/08/05 INA321 - microPower, Single-Supply, CMOS Instrumentation Amplifier
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.

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

INA2321, INA321E, INA321EA, INA2321EA

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