INA191
Overview
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 commonmode voltages from -0.2 V to +40 V, independent of the supply voltage.
- 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: 0.895-mm2 DSBGA - INA2191: 1.79-mm2 DSBGA
