ADR291GRZ-REEL7

Overview

The ADR291GRZ-REEL7 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 within a supply range of 2.8 V to 15 V and draws a maximum quiescent current of 15 μA across the extended industrial temperature range of −40°C to +125°C. It features a low noise output of 8 μV p-p (0.1 Hz to 10 Hz) and supports a maximum load current of 5 mA. The component is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes XFET architecture for significantly lower voltage noise compared to traditional band gap references.
• Provides high output current capability up to 5 mA while maintaining micropower consumption.
• Features very low thermal hysteresis and excellent long-term stability.
• Designed for operation with supplies as low as 2.8 V.

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 the specific suffix REEL7 corresponds to the required tape and reel packaging configuration. Confirm that the G grade designation matches the required ±0.24% initial accuracy and 25 ppm/°C temperature coefficient specifications. Ensure the 8-lead SOIC package type aligns with the target PCB footprint requirements.

Selection Notes

Select this component when a stable 2.5 V reference is needed with minimal power consumption. The XFET technology offers superior noise performance over standard band gap designs. Consider the 2.8 V minimum input requirement relative to the available supply rails. Evaluate the 5 mA load current capability against the system's peak demand.

Part Context

This part belongs to the ADR291/ADR292 family of precision voltage references. The ADR291 series specifically offers 2.5 V outputs, whereas the ADR292 provides 4.096 V. The GRZ suffix indicates the G electrical grade with 0.24% accuracy and 25 ppm/°C drift, packaged in an 8-lead SOIC.

Replacement Considerations

Pin-compatible with REF02 and REF19x series devices. Other members of the ADR291 family, such as ADR291ERZ or ADR291FRZ, offer higher accuracy grades but may differ in cost and availability.