The OP281 and OP481 are dual and quad ultralow power, singlesupply amplifiers featuring rail-to-rail outputs. Each operates from supplies as low as 2.0 V and are specified at +3 V and +5 V single supply as well as 5 V dual supplies. Fabricated on Analog Devices' CBCMOS process, the OP281/OP481 features a precision bipolar input and an output that swings to within millivolts of the supplies and continues to sink or source current all the way to the supplies.