This single-supply, low-side, bidirectional current-sensing design example detects load currents from –1 A to +1 A. The single-ended output spans from 110 mV to 3.19 V. This design uses the OPA388-Q1 because of the low offset voltage and rail-to-rail input and output. One of the amplifiers is configured as a difference amplifier and the other amplifier provides the reference voltage.

Figure 8-1 shows the circuit drawing.

Figure 8-1 Bidirectional Current-Sensing