ADR291FRZ-REEL7

Voltage Reference Overview

The ADR291FRZ-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 ±0.12% and a maximum temperature coefficient of 15 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 features low noise (8 μV p-p, 0.1 Hz to 10 Hz) and supports up to 5 mA load current. Packaged in an 8-lead SOIC, it functions within an extended industrial temperature range of −40°C to +125°C.

Voltage Reference Feature Summary

• Utilizes XFET architecture for ultralow noise and thermal hysteresis
• Micropower operation with minimal quiescent current consumption
• High output drive capability supporting significant load currents
• Pin-compatible design facilitating direct upgrades from legacy references

Voltage Reference Applications

• Portable instrumentation systems
• Precision reference sources for 3 V and 5 V architectures
• Analog-to-digital and digital-to-analog converter references
• Solar-powered measurement instruments
• Loop-current-powered field devices

Voltage Reference Procurement Notes

Verify the specific suffix REEL7 indicates reel packaging when sourcing. Confirm the FRZ designation corresponds to the F grade specifications regarding accuracy and drift. Ensure the SOIC package variant matches the required footprint. Validate RoHS compliance status against current manufacturing revisions before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component for applications requiring low power consumption alongside high precision. The 2.5 V output suits single-supply systems operating near 3 V. Consider the 15 ppm/°C temperature coefficient for environments with moderate thermal fluctuations. Evaluate the 5 mA output current capability against peak load requirements to ensure stable regulation under transient conditions.

Voltage Reference Part Context

This part belongs to the ADR291/ADR292 series of precision voltage references manufactured by Analog Devices. The family employs proprietary XFET technology to achieve performance superior to traditional bandgap designs. The ADR291 variant specifically offers a 2.5 V output, distinguishing it from the 4.096 V ADR292 model while sharing identical package options and core architectural benefits.

Voltage Reference Replacement Considerations

The datasheet confirms pin compatibility with REF02 and REF19x series references. Verify that the replacement device meets the specific 15 ppm/°C temperature coefficient requirement. Ensure the new component supports the same 2.8 V minimum input voltage for direct circuit integration without modification.