The ZXCT1008EV1 is a current monitor evaluation board which measures 0.5A, 2.0A or a 2.5A load current. This current is then translated to a proportional output current which is scaled by an external resistor to give a 2.5V full scale output voltage.

This split-supply, high-side current sensing solution accurately detects load currents from 10 μA to 100 mA. The linear range of the differential voltage output is from -4.9V to +4.9 V. An instrumentation amplifier with pin-programmable gain was selected in order to measure the four-decade load current range.

This application note describes the STEVAL-ISQ013V1, a demonstration board specifically designed for low-side current sensing with the TS507 operational amplifier.