ADR4520ARZ-R7

Overview

The ADR4520ARZ-R7 is a high-precision, low-power voltage reference from Analog Devices featuring an ultralow noise architecture. It provides a fixed output of 2.048 V with an initial accuracy of ±0.04% (A grade). The device operates over an extended temperature range of −40°C to +125°C and exhibits a maximum temperature coefficient of 4 ppm/°C. Key electrical specifications include a maximum quiescent current of 950 μA, a dropout voltage of 1 V at no load, and an output noise of 1 μV p-p in the 0.1 Hz to 10 Hz band. It supports ±10 mA sourcing and sinking currents within an input voltage range of 3 V to 15 V.

Feature Summary

• Ultralow noise performance for precision signal chain applications
• High accuracy with minimal long-term drift and thermal hysteresis
• Low power consumption suitable for portable equipment
• Robust load regulation across wide operating conditions

Applications

• Precision data acquisition systems
• High resolution data converters
• Industrial instrumentation
• Medical devices

Procurement Notes

Verify the specific grade (A, B, C, or D) required for your application, as temperature coefficients and accuracy vary by grade. Confirm that the SOIC-8 package and reel packaging match your assembly line requirements. Ensure input voltage constraints align with the 3 V to 15 V operational range specified in the datasheet.

Selection Notes

Select this component when ultralow noise and high stability are critical. The A grade offers ±0.04% accuracy and 4 ppm/°C TC over the full industrial range. Consider the dropout voltage characteristics if operating near minimum supply voltages. Verify thermal management needs based on the specified junction-to-ambient resistance values for the SOIC package.

Part Context

This part belongs to the ADR45xx family of ultralow noise voltage references, which includes variants like ADR4525, ADR4530, ADR4533, ADR4540, and ADR4550. These devices share a common innovative core topology designed for high accuracy and excellent temperature stability. The family is available in both 8-lead SOIC and LCC packages, catering to diverse PCB layout requirements.

Replacement Considerations

Direct replacements within the same family include ADR4520BRZ for higher accuracy grades. Cross-family alternatives may require verification of pin compatibility and electrical parameter alignment.