ADR291/ADR292 is a low noise micropower 2.5V and 4.096V precision voltage reference from Analog Devices. It has a supply voltage range of 2.8V to 15V, a supply current of 15μA, an output current of up to 5mA, and a temperature range of -40°C to +125°C. It is suitable for portable instrumentation, 3V and 5V systems, A/D and D/A converter references, solar-powered applications, and loop-current-powered instruments.