TPA191A2-SC6R Bidirectional Current Sense Amplifier with Zero Drift

Product Highlights > TPA191A2-SC6R Bidirectional Current Sense Amplifier with Zero Drift

            TPA191A2-SC6R Bidirectional Current Sense Amplifier with Zero Drift
                    3PEAK’s TPA191 device operates from a single 2.7 V to 36 V power supply while drawing a typical 80 μA supply current
    

3PEAK’s TPA191 series of zero-drift, bidirectional current sense amplifier can sense voltage drops across shunts at common-mode voltages from -0.3 V to 36 V, independent of the supply voltage. Five fixed gains are available, including 20 V/V, 50 V/V, 75 V/V, 100 V/V, and 200 V/V. The integration-matched gain resistor network minimizes gain errors and reduces the temperature drift. The low offset of the zero-drift architecture enables current sensing with the maximum drops across the shunt as low as 10 mV full-scale. The TPA191 devices operate from a single 2.7 V to 36 V power supply, drawing a typical 80 μA supply current. All versions are specified from -40°C to +125°C and offered in the SOT363 package.

Features

Voltage offset:
- ±50 μV (max) at V_CM = 2.75 V
- ±180 μV (max) at V_CM = 12 V
Wide common-mode voltage: -0.3 V to +36 V
Supply voltage: 2.7 V to 36 V
Accuracy and zero-drift performance:
- ±1% gain error (max overtemperature)
- 0.2 μV/°C offset drift (typ)
- 10 ppm/°C gain drift (max)

Three gain options for voltage output:
- TPA191A2: 50 V/V
- TPA191A4: 100 V/V
- TPA191A5: 200 V/V
Package: SOT363
Industrial operating range: -40°C to +125°C
Low supply current: 80 μA (typ)
Rail-to-rail output