ADR291FRZ-REEL

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 typical quiescent current of 12 μA. It features low noise (8 μV p-p) and high output current capability up to 5 mA. Packaged in an 8-lead SOIC, it supports operation across the extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes XFET architecture for low noise and ultralow thermal hysteresis
• Provides stable precision voltage reference with minimal power consumption
• Capable of sourcing load currents up to 5 mA

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 indicates tape and reel packaging containing 1,000 units per manufacturer specifications. Confirm the FRZ designation corresponds to the F grade electrical characteristics, specifically the ±0.12% initial accuracy and 15 ppm/°C temperature coefficient. Ensure the package type matches the required 8-lead SOIC footprint for the target circuit design.

Selection Notes

Select this component when a 2.5 V reference is required with tight initial accuracy and low drift over temperature. The F grade offers a balance between performance and cost compared to the E grade. Consider the 12 μA supply current for battery-operated designs. Verify that the 2.8 V minimum input voltage meets the system's supply headroom requirements relative to the 2.5 V output.

Part Context

This part belongs to the ADR291/ADR292 family of XFET voltage references. The ADR291 variant specifically delivers a 2.5 V output, whereas the ADR292 provides 4.096 V. The family replaces traditional band gap and buried Zener references, offering superior noise performance and stability. The FRZ suffix denotes the F grade within the 8-lead SOIC package option.

Replacement Considerations

Pin-compatible with REF02 and REF19x series devices. Direct substitution requires verifying that the replacement meets the specific 2.5 V output, accuracy, and temperature coefficient requirements of the original design.