ADR420ARZ-REEL7

Overview

The ADR420ARZ-REEL7 is a second-generation XFET voltage reference with a fixed output of 2.048 V. It operates within an input range of 4 V to 18 V and delivers up to 10 mA of load current. The device features low noise (1.75 µV p-p from 0.1 Hz to 10 Hz) and high accuracy grades, including ±0.05% for B Grade. Temperature coefficients are specified at 3 ppm/°C for B Grade and 10 ppm/°C for A Grade. Quiescent current is typically 390 µA, rising to 600 µA across the −40°C to +125°C operating temperature range.

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 performance.
• Provides long-term stability of 50 ppm per 1000 hours and exceptionally low low-frequency noise suitable for precision analog applications.

Applications

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

Procurement Notes

Verify the specific electrical grade (A or B) required for your application, as initial accuracy and temperature coefficient specifications differ between them. Confirm that the REEL7 suffix indicates tape and reel packaging compatible with automated assembly equipment. Ensure input voltage headroom requirements align with the minimum 2 V differential specification under expected load conditions.

Selection Notes

Select this component when ultra-low noise and high precision are critical for signal integrity in measurement systems. Consider the B Grade variant if tighter initial accuracy and lower temperature drift are necessary. Evaluate the need for external trimming if system-level calibration is required to compensate for PCB trace resistance or other circuit errors.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices Inc. The series includes variants with different fixed output voltages, such as the ADR421 (2.5 V), ADR423 (3 V), and ADR425 (5 V). All members share the same XFET architecture and package options, ensuring consistent performance characteristics across the family.

Replacement Considerations

Direct functional replacements within the same series include the ADR421ARZ-REEL7, ADR423ARZ-REEL7, and ADR425ARZ-REEL7, provided the output voltage matches the design requirement. Verify pin compatibility and thermal resistance values when substituting packages.