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INA191 - Ultra-Precise Current Sense Amplifier

Description

The INAx191 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier) that is commonly used for overcurrent protection, precision-current measurement for system optimization, or in closed-loop feedback circuits.

Features

  • Low power:.
  • Supply voltage, VS: 1.7 V to 5.5 V.
  • Shutdown current: 100 nA (max INA191).
  • Quiescent current: 43 μA at 25 °C (INA191).
  • Low input bias currents: 100 pA (typical) (enables microamp current measurement).
  • Bidirectional current measurement (INA2191).
  • Accuracy:.
  • ±0.25% max gain error (A2 to A5 devices).
  • 7-ppm/°C gain drift (maximum).
  • ±12 μV (maximum) offset voltage.
  • 0.13-μV/°C offset drift (.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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INA191, INA2191 SLYS020C – FEBRUARY 2019 – REVISED AUGUST 2021 INAx191 40-V, Bidirectional, Ultra-Precise Current Sense Amplifier With picoamp IB and ENABLE in WCSP Package 1 Features • Low power: – Supply voltage, VS: 1.7 V to 5.5 V – Shutdown current: 100 nA (max INA191) – Quiescent current: 43 μA at 25 °C (INA191) • Low input bias currents: 100 pA (typical) (enables microamp current measurement) • Bidirectional current measurement (INA2191) • Accuracy: – ±0.25% max gain error (A2 to A5 devices) – 7-ppm/°C gain drift (maximum) – ±12 μV (maximum) offset voltage – 0.13-μV/°C offset drift (maximum) • Wide common-mode voltage: –0.2 V to +40 V • Gain options: – INAx191A1: 25 V/V – INAx191A2: 50 V/V – INAx191A3: 100 V/V – INAx191A4: 200 V/V – INAx191A5: 500 V/V • Packages: – INA191: 0.
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