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.
The ADR291 and ADR292 are low noise, micropower precision voltage references that utilize an XFET reference circuit. This architecture offers significant performance improvements over traditional band gap and buried Zener-based references, including one quarter the voltage noise output of band gap references operating at the same current, very low and ultralinear temperature drift, and low thermal hysteresis. The devices provide stable and accurate output voltages from supplies as low as 2.8 V for the ADR291 and 5 V for the ADR292.
| Supply Range (ADR291) | 2.8 V to 15 V |
|---|---|
| Supply Current (Typical) | 12 μA |
| Noise Voltage (0.1 Hz to 10 Hz) | 8 μV p-p (ADR291) |
| Noise Voltage (0.1 Hz to 10 Hz) | 12 μV p-p (ADR292) |
| Output Current | 5 mA |
| Temperature Range | -40°C to +125°C |
| Output Voltage (ADR291) | 2.5 V |
| Output Voltage (ADR292) | 4.096 V |
The quiescent current is only 12 μA, making these devices ideal for battery-powered instrumentation.
The ADR291 provides a 2.5 V output, while the ADR292 provides a 4.096 V output.
The maximum supply voltage is 15 V for the ADR291 and 15 V for the ADR292.
The devices are available in 8-lead SOIC, 8-lead TSSOP, and 3-lead TO-92 packages.