ISL28133 Single Micropower Operational Amplifier Renesas / Intersil ISL28133 Single Micropower Operational Amplifier is a single micropower, chopper-stabilized operational amplifier that is optimized for single-supply operation from 1.8V to 5.5V. Its low supply current of 18µA and wide input range enable the ISL28133 to be an excellent general-purpose op-amp for a range of applications. The ISL28133 is ideal for handheld devices that operate off 2 AA or single Li-ion batteries.