The OPA349 and OPA2349 are ultra-low power operational amplifiers that provide 70kHz bandwidth with only 1A quiescent current. These rail-to-rail input and output amplifiers are specifically designed for battery powered applications. Unlike some micropower op amps, these parts are unity-gain stable and require no external compensation. The OPA349's low input bias current allows the use of large source and feedback resistors. The input common-mode voltage range extends 200mV beyond the power supply rails and the output swings to within 150mV of the rails, maintaining wide dynamic range.