ADR292FR

Overview

The ADR292FRZ is a low noise, micropower precision voltage reference utilizing XFET architecture. It provides a nominal output of 4.096 V with an initial accuracy of ±0.10% and a maximum temperature coefficient of 15 ppm/°C. The device operates from a supply range of 4.4 V to 15 V with a typical quiescent current of 12 μA. It features a low noise output of 12 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 and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes XFET architecture for ultralow thermal hysteresis and excellent long-term stability compared to traditional band gap references.
• Delivers high output current capability up to 5 mA while maintaining very low quiescent power consumption suitable for battery-powered systems.
• Offers pin compatibility with legacy REF02 and REF19x series devices to facilitate design upgrades.

Applications

• Precision reference for analog-to-digital and digital-to-analog converters
• Portable instrumentation powered by batteries or solar sources
• Loop-current-powered instruments requiring stable voltage rails

Procurement Notes

Verify the specific suffix 'FRZ' corresponds to the required electrical grade (±0.10% accuracy, 15 ppm/°C TC) and 8-lead SOIC packaging. Confirm that the minimum supply voltage requirement of 4.4 V aligns with the system input capabilities. Ensure the ordering quantity matches the tube configuration specified in the manufacturer's ordering guide.

Selection Notes

Select this component when a 4.096 V reference is required with tighter accuracy than standard band gap options but lower cost than laser-trimmed alternatives. The XFET technology provides superior noise performance and stability over wide temperature ranges. Consider the 4.4 V minimum dropout voltage when designing for low-voltage supply environments.

Part Context

The ADR292 is part of the ADR291/ADR292 family of micropower precision voltage references. While the ADR291 provides a 2.5 V output, the ADR292 is specifically configured for 4.096 V applications. Both share the same XFET core technology, package options, and general characteristics, differing primarily in their factory-set output voltages and associated accuracy grades.

Replacement Considerations

The datasheet confirms pin-compatible replacements within the same family, such as the ADR292ERZ for higher accuracy (±0.07%) or the ADR292GRZ for wider tolerance (±0.15%). Verify that any substitute maintains the 4.096 V output and meets the specific temperature coefficient requirements of the application.

FAQ

What is the minimum supply voltage required for the ADR292?

The ADR292 requires a minimum supply voltage of 4.4 V to operate correctly.

How does the XFET architecture improve performance over band gap references?

XFET technology reduces voltage noise output to one-quarter of comparable band gap references at the same current and offers significantly lower thermal hysteresis and better long-term stability.