|Package | PIN:||DSBGA (YFD) | 6|
|Temp:||Q (-40 to 125)|
- Low power:
- Low supply voltage, VS: 1.7 V to 5.5V
- Low shutdown current: 100 nA (max)
- Low quiescent current:43 µA at 25°C (typ)
- Low input bias currents: 100 pA (typ)
(enables microamp current measurement)
- ±0.25% max gain error (A2 to A5 devices)
- 7-ppm/°C gain drift (max)
- ±12 µV (max) offset voltage
- 0.13-µV/°Coffset drift (max)
- Wide common-mode voltage: –0.2 V to +40 V
- Gain options:
- INA191A1: 25 V/V
- INA191A2: 50 V/V
- INA191A3: 100V/V
- INA191A4: 200 V/V
- INA191A5: 500V/V
- Package: 0.895-mm2 DSBGA
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Texas Instruments INA191A1IYFDR
The INA191 is a low-power, voltage-output, current-shunt monitor (also called acurrent-sense amplifier) that is commonly used for overcurrent protection, precision-currentmeasurement for system optimization, or in closed-loop feedback circuits. This device can sensedrops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supplyvoltage. The low input bias current of the INA191 permits the use of larger current-senseresistors, and thus provides accurate current measurements in the µA range. Five fixed gains areavailable: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The low offset voltage of the zero-driftarchitecture extends the dynamic range of the current measurement, and allows for smaller senseresistors with lower power loss while still providing accurate current measurements.
The INA191 operates from a single 1.7-V to 5.5-V power supply, drawing a maximum of 65 µAof supply current when enabled and only 100 nA when disabled. The device is specified over theoperating temperature range of –40°C to +125°C, and offered in a DSBGA-6 package.