INAx191 40-V, Bidirectional, Ultra-Precise Current Sense Amplifier With picoamp IB and ENABLE in WCSP Package

1 Features

Low power:
- Supply voltage, V_S: 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