The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense
amplifier). This device is commonly used for overcurrent protection,
precision current measurement for system optimization, or in closed-loop feedback circuits.
The INA190 can sense drops across shunts at common-mode voltages from –0.2 V
to +40 V, independent of the supply voltage.The low input bias current of the device permits the use of larger current-sense
resistors, thus providing accurate current measurements in the microamp range. The low offset
voltage of the zero-drift architecture extends the dynamic range of the current measurement. This
feature allows for smaller sense resistors with lower power loss, while still providing accurate
current measurements.The INA190 operates
from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are
available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating
temperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23
packages.
