ADR4550DEZ

Overview

The ADR4550DEZ is a high precision, low power voltage reference from Analog Devices featuring a 5.000 V output. It offers ±0.02% maximum initial error for B, C, and D grades with temperature coefficients ranging from 0.8 ppm/°C to 4 ppm/°C depending on the grade. The device operates within an input voltage range of 3 V to 15 V and supports +10 mA sourcing and −10 mA sinking currents. It provides ultralow noise performance (2.8 μV p-p at 0.1 Hz to 10 Hz) and long-term drift of 8 ppm typical at 4500 hours. Available in 8-lead SOIC and LCC packages, it functions over extended industrial temperature ranges.

Feature Summary

• Innovative core topology delivering industry-leading temperature stability and low output noise
• Low thermally induced output voltage hysteresis and minimal long-term drift for sustained accuracy
• Capable of sourcing up to 10 mA and sinking up to 10 mA with low dropout voltage characteristics

Applications

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

Procurement Notes

Verify the specific grade suffix (e.g., DEZ indicates D grade) against project requirements, as temperature coefficient and operating range vary by grade. Confirm package type matches design constraints. Check official documentation for automotive qualification status if applicable. Ensure supply voltage and load conditions align with absolute maximum ratings to prevent damage.

Selection Notes

Select based on required output voltage accuracy and temperature stability. D grade offers the lowest temperature coefficient but limited to 0°C to +70°C. B grade covers the full −40°C to +125°C range with slightly higher drift. Consider quiescent current limits for portable applications and ensure adequate thermal management for the chosen package.

Part Context

Part of the ADR45xx series of ultralow noise voltage references. Shares common features like low dropout voltage and high ripple rejection ratio across the family. Differentiated by output voltage options and grade-specific performance metrics. Designed for applications requiring stable reference voltages under varying environmental conditions.

Replacement Considerations

ADR4550ARZ: Same function, different package (SOIC-8 vs LCC). ADR4550BCPZ: Same function, different package (LFCSP). Verify pin compatibility and thermal resistance differences when substituting.