ADR420BRZ-REEL7

Overview

The ADR420BRZ-REEL7 is a second-generation XFET voltage reference providing a fixed 2.048 V output in an 8-lead SOIC package. It features B-grade initial accuracy of ±0.05% and a temperature coefficient of 3 ppm/°C over the -40°C to +125°C range. The device operates with a supply voltage from 4 V to 18 V, drawing a maximum quiescent current of 500 µA while delivering up to 10 mA load current. Key electrical characteristics include 1.75 µV p-p noise (0.1 Hz to 10 Hz), 50 ppm long-term stability, and 40 ppm hysteresis.

Feature Summary

• Utilizes patented eXtra implanted junction FET (XFET) technology for superior accuracy and thermal hysteresis compared to band gap references.
• Features a dedicated trim terminal allowing output voltage adjustment within a ±0.5% range without compromising temperature performance.
• Offers low noise density and excellent long-term stability suitable for high-resolution data acquisition systems.

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 and SOIC-8 package variant. Ensure compatibility with the required input voltage headroom and load current demands before finalizing procurement orders.

Selection Notes

Select this component for applications requiring ultra-low noise and high precision at the 2.048 V level. Consider the B-grade specifications for tighter accuracy limits. Evaluate the 8-lead SOIC footprint against available board space. Verify that the 4 V minimum input voltage requirement aligns with the system power supply architecture.

Part Context

This part belongs to the ADR42x series of ultraprecision voltage references manufactured by Analog Devices. The series includes variants with different nominal output voltages such as 2.5 V, 3.0 V, and 5.0 V. All members share the same XFET architecture and package options, ensuring consistent performance characteristics across the family.

Replacement Considerations

Direct replacements within the same series include ADR421, ADR423, and ADR425, provided the output voltage matches the design requirements. Cross-family replacements require verification of pinout compatibility and electrical parameter alignment.

FAQ

Can the output voltage be adjusted?

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

Is an output capacitor required for stability?

No, the ADR42x does not require an output capacitor for stability under any load condition, though one may be used for noise filtering.