The APX321WG-7 is a low voltage single Operational Amplifier with rail-to-rail input and output. The APX321 is designed to effectively reduce space at low voltage levels. This device has the capability of rail-to-rail output swing and input common-mode voltage range. It can also achieve an efficient speed-to-power ratio, utilizing 1MHz bandwidth and 1V/μs slew rate at a low supply current. Reducing noise pickup and increasing signal integrity can be achieved by placing the device close to the signal source.