ADR423BRZ-REEL7

Overview

The ADR423BRZ-REEL7 is a series precision voltage reference manufactured by Analog Devices Inc., featuring an XFET architecture for ultraprecision performance. It provides a fixed output voltage of 3 V with an initial accuracy of 0.04% and a temperature coefficient of 1 ppm/°C. The device operates within an input voltage range of 5 V to 18 V, drawing a maximum quiescent current of 500 µA while supporting up to 10 mA of load current. It exhibits low noise (2.0 µV p-p from 0.1 Hz to 10 Hz) and long-term stability of 50 ppm per 1000 hours. Packaged in an SOIC-8 surface-mount format, it functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes patented eXtra implanted junction FET (XFET) technology to minimize nonlinearity and achieve superior thermal hysteresis compared to band gap references.
• Includes a dedicated trim terminal allowing output voltage adjustment over a ±0.5% range without compromising temperature coefficient or other performance metrics.
• Features extremely low noise characteristics and high accuracy suitable for demanding precision conversion applications.

Applications

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

Procurement Notes

Verify the specific suffix REEL7 indicates reel packaging when sourcing components. Confirm that the BRZ designation corresponds to the B Grade electrical specifications, specifically the 0.04% initial accuracy and 1 ppm/°C temperature coefficient. Ensure the SOIC-8 package type matches the target PCB footprint requirements. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity and revision status before integration into production designs.

Selection Notes

Select this component when a 3 V reference with B Grade precision is required. The XFET architecture offers lower power consumption and headroom than buried Zener references. Consider the trim pin utility if system-level calibration is necessary. Evaluate the 500 µA quiescent current against battery life constraints. Verify that the 10 mA output current capability meets the load requirements of the downstream circuitry.

Part Context

This part belongs to the ADR42x family of ultraprecision voltage references, which also includes the ADR420, ADR421, and ADR425 models offering different nominal output voltages. All members share the same core XFET technology and package options. The ADR423 specifically targets applications requiring a 3 V reference standard. The family is designed for use in PMIC subsystems where stable, low-noise voltage generation is critical for signal integrity.

Replacement Considerations

ADR423ARZ-REEL7

FAQ

Can the output voltage be adjusted?

Yes, the TRIM terminal allows adjustment of the output voltage over a ±0.5% range without affecting the temperature coefficient.

What is the minimum input voltage required?

The device requires a minimum input voltage of 5 V to operate correctly within its specified parameters.