PINA2191A5IYBJR ACTIVE

Features for the INA2191

• Low power:
  • Low supply voltage, V_S: 1.7 V to 5.5 V
  • Low shutdown current: 100 nA (maximum)
  • Low quiescent current: 43 µA at 25 °C (typical)
• 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: 0.895-mm² DSBGA
  • INA2191: 1.79-mm² DSBGA

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Description for the INA2191

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. This device can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. The low input bias current of the INAx191 permits the use of larger current-sense resistors, and thus provides accurate current measurements in the µA range. Five fixed gains are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement, and allows for smaller sense resistors with lower power loss while still providing accurate current measurements.

The INAx191 operates from a single 1.7-V to 5.5-V power supply, drawing a maximum of 65 µA of supply current when enabled and only 100 nA when disabled. The device is specified over the operating temperature range of –40 °C to +125 °C, and offered in a DSBGA-6 (INA191) and DSBGA-12 (INA2191) packages.