INA331 - Low-Power, Single Supply, CMOS, Instrumentation Amplifier

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.

Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.

The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.

Products containing the "INA331" keyword are: INA331AIDGK , INA331AIDGKR , INA331AIDGKR(INA331IDGKR , INA331AIDGKRG4 , INA331AIDGKRG4 , INA331AIDGKT , INA331AIDGKTG4 , INA331AIDGKTG4 , INA331IDGKR , INA331IDGKRG4 , INA331IDGKT , INA331IDGKT , INA331IDGKT PBF , INA331IDGKTG4 , INA331IDGKTG4

• DESIGNED FOR LOW COST
• HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
• GAIN SET WITH EXT. RESISTORS FOR >5V/V
• LOW OFFSET VOLTAGE: ±250 µV
• HIGH CMRR: 94dB DC, 50dB at 45kHz
• LOW BIAS CURRENT: 0.5pA
• BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs
• RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
• WIDE TEMPERATURE RANGE: –55°C to +125°C
• LOW QUIESCENT CURRENT: 490 µA max/chan
• SHUT DOWN: 0.01 µA
• MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
• APPLICATIONS
  • INDUSTRIAL SENSOR AMPLIFIERS:
    Bridge, RTD, Thermocouple, Position
  • PHYSIOLOGICAL AMPLIFIERS:
    ECG, EEG, EMG
  • A/D CONVERTER SIGNAL CONDITIONING
  • DIFFERENTIAL LINE RECEIVERS WITH GAIN
  • FIELD UTILITY METERS
  • PCMCIA CARDS
  • AUDIO AMPLIFIERS
  • COMMUNICATION SYSTEMS
  • TEST EQUIPMENT
  • AUTOMOTIVE INSTRUMENTATION

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