ADCMP393 Quad Comparator Analog Devices Inc. ADCMP393 Quad Comparator is a rail-to-rail input, low power comparator that operates from a single supply voltage of 2.3V to 5.5V and draws a minimal amount of current. The quad ADCMP393 consumes only 26.8μA of supply current. ADCMP393 features a common-mode input voltage range of 200mV beyond rails, an offset voltage of 1mV typical across the full common-mode range, and a UVLO monitor.