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INA190_TI Zero-Drift Series, Current-Shunt Monitors
Preproduction Part Number:
INA190_Low Supply, Voltage Output,Low- or High-Side Measurement, Bidirectional, Zero-Drift Series, Current-Shunt Monitors
Low Supply Voltage, VVS: 1.7 V to 5.5 V
Wide Common-Mode Voltage: –0.1 V to +40 V
Low Shutdown Current: 500 nA (Max)
Low Input Bias Currents: 500 pA (Typ)
Low Offset Voltage, VOS: ±15 µV (Max, INA190A2)
(Enables Shunt Drops of 10-mV Full-Scale)
±0.3% Gain Error (Max Over Temperature)
0.13-µV/°C Offset Drift (Max)
5-ppm/°C Gain Drift (Max)
Gain Options:
INA190A1: 25 V/V
INA190A2: 50 V/V
INA190A3: 100 V/V
INA190A4: 200 V/V
INA190A5: 500 V/V
Quiescent Current: 40 µA at 25°C (Typ)
Packages: SC70, UQFN, and DSBGA
The INA190 series of devices are voltage-output, current-shunt monitors (also called current-sense amplifiers) that are commonly used for overcurrent protection, precision-current measurement for system optimization, or in closed-loop feedback circuits. This series of devices can sense drops across shunts at common-mode voltages from –0.1 V to +40 V, independent of the supply voltage. Five fixed gains are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The low input bias current of the INA190 permits the use of larger current-sense resistors, thus providing accurate current measurements in the µA range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. Therefore, much smaller shunt-voltage drops are allowed during high-current measurements, thus minimizing resistor power loss while still maintaining accurate current measurements.
These devices operate from a single 1.7-V to 5.5-V power supply, drawing a maximum of 70 µA of supply current when enabled and only 0.5 µA when disabled. All versions are specified over the extended operating temperature range of –40°C to +125°C, and offered in SC70, UQFN, and DSBGA packages.

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