INA322 - Micropower Single-Supply CMOS Instrumentation Amplifier

The INA322 family is a series of low cost, rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, 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 40µA. When shutdown the INA322 has a quiescent current of less than 1µA. Returning to normal operations within nanoseconds, the shutdown feature makes the INA322 optimal for low-power battery or multiplexing applications.

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.

• LOW COST
• LOW QUIESCENT CURRENT: 40µA/channel
  Shut Down: < 1µA
• HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C
• GAIN SET WITH EXTERNAL RESISTORS
• 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