What this current sense amplifier does
The Texas Instruments INA190A2IDDFR is a single-channel, zero-drift current sense amplifier in a TSOT-23-8 package. It measures the voltage drop across a shunt resistor and outputs a rail-to-rail voltage proportional to the load current.
Where it fits in a design
This part is built for high-side or low-side current sensing. The rail-to-rail output means the amplifier can swing its output close to the supply rails, preserving dynamic range when the shunt voltage is small. The 48 µA supply current makes it a candidate for always-on monitoring in battery-powered systems — a fuel-gauge front end, for example, or a solar charge controller that needs to log current around the clock.
The TSOT-23-8 package (supplier device package TSOT-23-8) is a surface-mount footprint.