The OPA336 micro-power CMOS operational amplifier (MicroAmplifier™ series) is designed for battery-powered applications. The device operates on a single supply, with operation as low as 2.1 V. The output is rail to rail and swings to within 3 mV of the supplies with a 100-k load. The common-mode range extends to the negative supply ideal for single-supply applications. In addition to small size and low quiescent current (23 µA/amplifier), the OPA336 features low offset voltage (500 µV typical), low input bias current (1 pA), and high open-loop gain (115 dB). The device is packaged in the tiny DBV (SOT23-5) surface-mount package. It operates from -55°C to 125°C. A macromodel is available for download (at www.ti.com) for design analysis.