The MAX492ESA+T, manufactured by Analog Devices, is a single, dual or quad micropower, single-supply rail-to-rail operational amplifier (op amp) that operates with a single-supply voltage as low as 1.8V and a maximum supply voltage of 5.5V. It is designed for low-voltage, battery-powered applications, and it delivers rail-to-rail performance for both inputs and outputs. It also offers rail-to-rail output swing, low offset voltage and low quiescent current (2.5µA), making it ideal for portable applications and power efficiency. The MAX492ESA+T also features low distortion and good PSRR (power supply rejection ratio). It is also very stable with high frequency feedback compensation and is available in a tiny SOT-23 package.