ADR421BRZ-REEL7

Overview

The ADR421BRZ-REEL7 is a second-generation XFET voltage reference with a fixed 2.500 V output, packaged in an 8-lead SOIC. It features B-grade initial accuracy of ±0.04% and a temperature coefficient of 3 ppm/°C over the −40°C to +125°C range. The device operates on a supply voltage from 4.5 V to 18 V, drawing a maximum quiescent current of 500 µA. It provides a high output current of 10 mA and exhibits low noise of 1.75 µV p-p (0.1 Hz to 10 Hz).

Feature Summary

• Utilizes patented eXtra implanted junction FET (XFET) technology for superior accuracy and thermal hysteresis compared to band gap references.
• Includes a dedicated trim terminal allowing output voltage adjustment within a ±0.5% range without compromising temperature coefficients.
• Offers excellent long-term stability of 50 ppm per 1000 hours and low output voltage hysteresis.

Applications

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

Procurement Notes

Verify the specific suffix 'BRZ' indicates the B-grade electrical performance and SOIC package configuration. Confirm that the '-REEL7' designation corresponds to tape and reel packaging requirements. Ensure compatibility with the required input voltage headroom and load conditions before finalizing procurement orders.

Selection Notes

Select this component when ultra-low noise and high precision are critical for signal integrity. The B-grade specification ensures tighter initial accuracy limits than standard grades. Consider the XFET architecture benefits regarding lower power consumption and reduced supply headroom requirements compared to traditional buried Zener references.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices Inc. The series includes variants with different nominal output voltages such as 2.048 V, 3.00 V, and 5.00 V. All members share the same core XFET technology and package options.

Replacement Considerations

ADR421ARZ-REEL7

FAQ

How does the XFET technology improve performance over band gap references?

XFET technology minimizes nonlinearity of voltage change with temperature and offers superior accuracy and thermal hysteresis while operating at lower power levels.

What is the function of the TRIM pin?

The TRIM pin allows the user to adjust the output voltage over a ±0.5% range to compensate for system errors without affecting the temperature coefficient.