SBOS470A December 2019 – June 2021 INA293
The INA293 measures the differential voltage developed by current flowing through a resistor, commonly referred to as a current-sensing resistor or a current-shunt resistor. The INA293 operates in unidirectional mode only, meaning it only senses current sourced from a power supply to a system load as shown in Figure 7-2.
The linear range of the output stage is limited to how close the output voltage can approach ground under zero-input conditions. The zero current output voltage of the INA293 is very small, with a maximum of GND + 20 mV. Make sure to apply a differential input voltage of (20 mV / Gain) or greater to keep the INA293 output in the linear region of operation.