ADR291GR-REEL

Overview

The ADR291GR-REEL is a low noise, micropower precision voltage reference utilizing XFET architecture. It provides a fixed 2.5 V output with an initial accuracy of ±0.24% and a maximum temperature coefficient of 25 ppm/°C. The device operates from a supply range of 2.8 V to 15 V with a maximum quiescent current of 15 μA. It delivers up to 5 mA of load current and features 8 μV p-p noise (0.1 Hz to 10 Hz). Thermal hysteresis is typically 50 ppm for the SOIC package. Operating temperatures span -40°C to +125°C.

Feature Summary

• XFET technology ensures low noise, ultralinear temperature drift, and excellent long-term stability compared to traditional band gap references.
• Pin-compatible with REF02 and REF19x families, facilitating direct upgrades in existing designs.
• Capable of sourcing high load currents up to 5 mA while maintaining low dropout voltage characteristics.

Applications

• Portable instrumentation
• Precision reference for 3 V and 5 V systems
• Analog-to-digital and digital-to-analog converter reference
• Solar-powered applications

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and reel quantity. Ensure the electrical grade matches the required accuracy and temperature coefficient specifications for the target application environment. Cross-reference pin configurations if replacing legacy components.

Selection Notes

Select this component when low power consumption and high precision are critical for battery-operated or portable devices. The extended industrial temperature range supports operation in harsh environments. Consider the thermal resistance of the chosen package for power dissipation calculations under maximum load conditions.

Part Context

This part belongs to the ADR291/ADR292 series of precision voltage references manufactured by Analog Devices. The family utilizes proprietary XFET circuitry to achieve superior performance metrics over standard band gap architectures. The GR designation indicates the G-grade electrical specification within the 8-lead SOIC package variant.

Replacement Considerations

ADR291ERZ

FAQ

What is the minimum input voltage required for the ADR291?

The ADR291 requires a supply voltage range of 2.8 V to 15 V.

How does the XFET architecture improve performance?

It offers one quarter the voltage noise output of band gap references operating at the same current, along with very low thermal hysteresis.