ADR291GRUZ

Overview

The ADR291GRUZ 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 maximum quiescent current of 15 μA. It delivers up to 5 mA of load current and features 8 μV p-p noise (0.1 Hz to 10 Hz). Packaged in an 8-lead TSSOP, it functions within a temperature range of −40°C to +125°C.

Feature Summary

• XFET technology ensures low thermal hysteresis and excellent long-term stability compared to traditional band gap references.
• Micropower design with minimal quiescent current consumption suitable for battery-powered instrumentation.
• High output drive capability allows sourcing up to 5 mA of load current.
• Low noise performance minimizes signal interference in sensitive analog circuits.

Applications

• Portable instrumentation
• Precision reference for 3 V and 5 V systems
• Analog-to-digital and digital-to-analog converter reference

Procurement Notes

Verify the specific suffix GRUZ corresponds to the 8-lead TSSOP package and G grade specifications before ordering. Confirm that the required electrical grades match the ±0.24% accuracy and 25 ppm/°C temperature coefficient limits defined in the datasheet. Ensure the application supply voltage remains within the 2.8 V to 15 V operational range to maintain specified performance characteristics.

Selection Notes

Select this component when a stable 2.5 V reference is required in space-constrained surface-mount designs. The 8-lead TSSOP package offers a compact footprint compared to larger alternatives. Consider the G grade specifications if higher accuracy or lower temperature coefficients are not strictly necessary for the system requirements.

Part Context

This part belongs to the ADR291/ADR292 family of precision voltage references manufactured by Analog Devices. The ADR291 variant specifically provides a 2.5 V output, whereas the ADR292 provides 4.096 V. The GRUZ suffix indicates the 8-lead TSSOP package option, distinguishing it from SOIC or TO-92 package variants within the same product line.

Replacement Considerations

The datasheet notes pin compatibility with REF02 and REF19x series devices. Verify that any substitute maintains the required 2.5 V output, package dimensions, and electrical specifications such as noise and temperature coefficient.