ADR431TRZ-EP

Overview

The ADR431TRZ-EP is an XFET voltage reference with a fixed 2.5 V output, ±0.04% initial accuracy, and a maximum temperature coefficient of 5 ppm/°C over the −55°C to +125°C military range. It operates on a 4.5 V to 18 V supply with 800 µA quiescent current and provides ±10 mA source/sink capability. The device features 3.5 µV p-p low-frequency noise, a trim terminal for 0.5% adjustment, and an 8-lead SOIC package.

Feature Summary

• Utilizes patented XFET technology to minimize voltage change vs. temperature nonlinearity.
• Supports defense and aerospace applications through AQEC standards and controlled manufacturing baselines.
• Provides high output drive capability with both sourcing and sinking currents up to 10 mA.

Applications

• Precision data acquisition systems
• High resolution data converters
• Optical control circuits

Procurement Notes

Verify the specific suffix (TRZ-EP) against the manufacturer's ordering guide to confirm RoHS compliance and tape-and-reel packaging quantities. Confirm that the military temperature range and enhanced product features align with project requirements before finalizing procurement.

Selection Notes

Select this component when low noise and high stability are required in harsh environments. Ensure the input voltage headroom meets the minimum 2 V requirement relative to the 2.5 V output. Consider the trim pin utility if fine-tuning the output voltage within the specified 0.5% range is necessary for the circuit design.

Part Context

This part belongs to the ADR431-EP series, which utilizes eXtra implanted junction FET technology. It is designed as a low-noise alternative to buried Zener references, offering lower supply voltage headroom requirements while maintaining high precision and stability across extreme temperature variations.

Replacement Considerations

ADR431BRZ-REEL7

FAQ

What is the function of Pin 3?

Pin 3 is labeled NIC, meaning it is Not Internally Connected and should not be used in the circuit layout.

How can the output noise be reduced?

A series resistor-capacitor network can be connected from the COMP pin (Pin 7) to the VOUT pin to reduce overall noise.