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INA2191 - Ultra-Precise Current Sense Amplifier

Download the INA2191 datasheet PDF. This datasheet also covers the INA191 variant, as both devices belong to the same ultra-precise current sense amplifier family and are provided as variant models within a single manufacturer datasheet.

General 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.

Key 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 (.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (INA191-etcTI.pdf) that lists specifications for multiple related part numbers.

Other Datasheets by Texas Instruments

Part Number Description
INA219 Bidirectional Current/Power Monitor
INA210 Current-Shunt Monitors
INA210-Q1 Current-Shunt Monitors
INA211 Current-Shunt Monitors
INA211-Q1 Current-Shunt Monitors
INA212 Current-Shunt Monitors
INA212-Q1 Current-Shunt Monitors
INA2126 MicroPower Instrumentation Amplifier
INA2128 Low-Power Instrumentation Amplifier
INA213 Current-Shunt Monitors

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.

View original datasheet text
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.