ADR291FR-REEL7

Overview

The ADR291FR-REEL7 is a low noise, micropower precision voltage reference utilizing XFET architecture. It provides a nominal output voltage of 2.5 V with an initial accuracy of ±0.12% and a maximum temperature coefficient of 15 ppm/°C. The device operates from a supply range of 2.8 V to 15 V, drawing a maximum quiescent current of 15 μA across the extended industrial temperature range of −40°C to +125°C. It features low noise performance of 8 μV p-p (0.1 Hz to 10 Hz) and supports high output currents up to 5 mA.

Feature Summary

• Utilizes XFET architecture for low noise and ultralinear temperature drift
• Provides stable precision voltage reference with minimal thermal hysteresis
• Supports high output current capability for driving various loads

Applications

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

Procurement Notes

Verify that the specific part number matches the required electrical grade F specifications, including the 15 ppm/°C temperature coefficient and 0.12% initial accuracy. Confirm the package type corresponds to the 8-Lead SOIC_N (R-8) as indicated by the suffix. Ensure compatibility with the intended supply voltage range of 2.8 V to 15 V before integration into the design.

Selection Notes

Select this component when low noise and micropower consumption are critical for battery-operated or portable designs. The XFET technology offers superior performance compared to traditional band gap references. Consider the 15 ppm/°C temperature coefficient for applications requiring stability over the full industrial temperature range without complex compensation circuits.

Part Context

This component belongs to the ADR291/ADR292 family of precision voltage references manufactured by Analog Devices. The ADR291 series specifically offers a 2.5 V output option, while the ADR292 provides 4.096 V. Both families share the same pinout and architectural benefits, allowing for flexible design choices based on required reference voltage levels.

Replacement Considerations

The datasheet indicates the device is pin-compatible with REF02 and REF19x series references. Designers replacing legacy components should verify that the replacement meets the specific noise and temperature coefficient requirements of the original design.