ADR291GT9Z

Overview

The ADR291GT9Z 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 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. The component is housed in a 3-lead TO-92 package and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Utilizes XFET architecture for low noise and ultralinear temperature drift
• Offers high output current capability for driving loads directly
• Provides stable performance over extended industrial temperature ranges
• Features low thermal hysteresis and excellent long-term stability

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 GT9Z corresponds to the 3-lead TO-92 package configuration. Confirm that the G grade specifications align with project requirements for initial accuracy and temperature coefficient limits. Ensure input voltage constraints are met within the specified operating range to maintain performance parameters.

Selection Notes

Select this component when a through-hole mounting solution is required for precision voltage referencing. The TO-92 package suits applications where board space allows for larger footprints but requires robust mechanical mounting. Consider the 25 ppm/°C temperature coefficient and 0.24% accuracy as primary selection criteria against tighter tolerance alternatives.

Part Context

This part belongs to the ADR291/ADR292 family of precision voltage references. The ADR291 variant specifically delivers a 2.5 V output, whereas the ADR292 provides 4.096 V. Both share identical architectural benefits including XFET technology and low power consumption, differing primarily in output voltage and specific accuracy grades available across various package options.

Replacement Considerations

Pin-compatible with REF02 and REF19x series devices. Verify pinout alignment before substitution to ensure VIN, GND, and VOUT connections match the target circuit design without modification.