ADR291GRUZ-REEL

Overview

The ADR291GRUZ-REEL7 is a low noise, micropower precision voltage reference from Analog Devices 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, drawing a maximum quiescent current of 15 μA. It features a low noise output of 8 μV p-p (0.1 Hz to 10 Hz) and supports up to 5 mA load current. Packaged in an 8-lead TSSOP, it functions reliably across an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes XFET architecture for low noise and ultralinear temperature drift
• Supports high output current capability up to 5 mA
• Offers excellent long-term stability with minimal thermal hysteresis

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 reel packaging when sourcing. Confirm the G grade designation corresponds to the required ±0.24% accuracy and 25 ppm/°C temperature coefficient specifications. Ensure the 8-lead TSSOP package matches the target PCB footprint. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity and revision status.

Selection Notes

Select this component for battery-powered designs requiring low quiescent current and stable reference performance. The 2.5 V output suits 3 V system architectures without additional boosting. Verify that the 25 ppm/°C temperature coefficient meets the application's precision requirements over the full operating temperature range. Consider the 8-lead TSSOP package dimensions for board space constraints.

Part Context

This part belongs to the ADR291/ADR292 series of precision voltage references. The ADR291 variant specifically provides a 2.5 V output, whereas the ADR292 offers 4.096 V. Both share the same XFET-based core technology and pin configurations. The GRUZ suffix identifies the G electrical grade and the RU-8 (TSSOP) package option within the product family.

Replacement Considerations

Pin-compatible alternatives include REF02 and REF19x series devices. Direct functional replacements within the Analog Devices portfolio include other ADR291 variants with different packages or grades.