ADR425ARMZ

Overview

The ADR425ARMZ is a fixed-output XFET voltage reference providing 5.0 V with ±0.12% initial accuracy and a 3 ppm/°C temperature coefficient. It operates within a 7 V to 18 V input range, delivering up to 10 mA output current while consuming a maximum of 600 µA quiescent current. The device features 3.4 µV p-p low-frequency noise (0.1 Hz to 10 Hz) and 50 ppm long-term stability over 1000 hours. Packaged in an 8-lead MSOP footprint, it supports operation from −40°C to +125°C.

Feature Summary

• Utilizes second-generation eXtra implanted junction FET (XFET) technology for superior thermal hysteresis and lower noise compared to band gap references.
• Includes a dedicated trim terminal allowing precise output voltage adjustment within a ±0.5% range without compromising other performance metrics.
• Integrates patented temperature drift curvature correction to minimize nonlinearity of the voltage change across the operating temperature range.

Applications

• Precision data acquisition systems
• High resolution converters
• Battery-powered instrumentation
• Portable medical instruments
• Optical network control circuits

Procurement Notes

Verify the specific suffix 'ARMZ' corresponds to the MSOP package and tube packaging format when sourcing. Confirm that the required electrical grade matches the ±0.12% accuracy specification. Ensure the application input voltage remains above the 7 V minimum threshold to maintain proper regulation and linearity characteristics.

Selection Notes

Select this component when a stable 5.0 V reference is required for high-resolution analog-to-digital conversion or precision measurement applications. Consider the 7 V minimum supply headroom requirement during system design. Evaluate the need for the trim pin if tighter system-level calibration is necessary beyond the factory-set accuracy.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices. The series includes variants with different nominal outputs such as 2.048 V, 2.5 V, and 3.0 V. All members share the same XFET architecture and are available in both SOIC and MSOP packages.

Replacement Considerations

ADR425BRZ

FAQ

How does the XFET architecture improve upon traditional band gap references?

The XFET architecture provides significantly lower noise and superior thermal hysteresis performance compared to standard band gap references, while also requiring less power and lower supply headroom.

What is the function of Pin 5 on the ADR425ARMZ?

Pin 5 is the TRIM terminal, which allows the user to adjust the output voltage over a ±0.5% range to compensate for system errors without affecting the temperature coefficient.