ADR425BR-REEL7

Overview

The ADR425BRZ-REEL7 is a series precision voltage reference from Analog Devices, featuring a fixed 5.00 V output and an initial accuracy of ±0.04%. It utilizes XFET technology to achieve a low temperature coefficient of 3 ppm/°C and operates within an extended industrial temperature range of −40°C to +125°C. The device draws a maximum quiescent current of 500 µA and supports a maximum shunt current of 10 mA. It requires a supply voltage between 7 V and 18 V and is housed in an 8-lead SOIC package.

Feature Summary

• Utilizes second-generation eXtra implanted junction FET (XFET) architecture for superior accuracy and thermal hysteresis compared to band gap references.
• Incorporates patented temperature drift curvature correction to minimize nonlinearity of voltage change with temperature.
• Includes a trim terminal allowing output voltage adjustment over a ±0.5% range without compromising other performance characteristics.

Applications

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

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the B-grade electrical specifications and SOIC-8 packaging as defined in the official datasheet. Confirm that the REEL7 designation matches the required tape and reel quantity for manufacturing integration. Ensure compatibility with the specified 7 V to 18 V input range and check RoHS compliance status prior to final procurement decisions.

Selection Notes

Select this component when a stable 5.00 V reference is required with high precision and low noise characteristics. The B-grade specification ensures tight initial accuracy and low temperature drift suitable for critical measurement applications. Consider the 8-lead SOIC footprint for PCB layout constraints and verify that the 500 µA quiescent current aligns with system power budget requirements.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices Inc. The series includes variants with different output voltages such as 2.048 V, 2.500 V, and 3.00 V. All members share the same XFET technology and package options, offering consistent performance metrics across the family while differing in nominal output voltage and specific electrical grades.

Replacement Considerations

Other models within the ADR42x family, such as ADR421 or ADR423, may serve as functional substitutes if the specific 5.00 V output requirement can be adjusted or if a different voltage level is acceptable. Ensure any replacement maintains the required B-grade accuracy and SOIC-8 package dimensions for direct board compatibility.

FAQ

Can the output voltage be adjusted?

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

What is the minimum supply voltage required?

The ADR425 requires a supply voltage headroom of at least 2 V above the output, resulting in a minimum operating input voltage of 7 V.