ADR4525ARZ

Overview

The ADR4525ARZ is a high precision, low power, low noise voltage reference featuring an output voltage of 2.500 V and an initial accuracy of ±0.04%. It operates within an input voltage range of 3 V to 15 V and supports an output current capacity of +10 mA source and −10 mA sink. The device exhibits a maximum temperature coefficient of 4 ppm/°C over the extended industrial operating temperature range of −40°C to +125°C. Quiescent current is specified at a maximum of 950 μA, with a typical low dropout voltage of 500 mV at 2 mA load.

Feature Summary

• Utilizes innovative core topology for industry-leading temperature stability and noise performance
• Features low thermally induced output voltage hysteresis and low long-term drift
• Capable of sourcing and sinking up to 10 mA output current
• Operates effectively in portable equipment due to low quiescent current and low dropout voltage

Applications

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

Procurement Notes

Verify the specific grade (A, B, C, or D) required for your application, as temperature coefficients and operating ranges vary by grade. Confirm package availability, noting that while the ARZ suffix indicates SOIC-8, other grades may be available in LCC packages. Ensure compliance with automotive requirements if applicable, as specific variants like the ADR4525W are qualified for such environments.

Selection Notes

Select the ADR4525ARZ when a fixed 2.5 V reference is needed with high accuracy and low noise. Consider the A grade for standard industrial applications requiring operation from −40°C to +125°C. For tighter thermal stability, evaluate higher grades like B, C, or D, which offer lower temperature coefficients but may have restricted operating temperature ranges. Ensure the input voltage remains within the 3 V to 15 V specification.

Part Context

The ADR4525ARZ belongs to the ADR45xx series of ultralow noise, high accuracy voltage references manufactured by Analog Devices. This family includes various output voltages such as 2.048 V, 3.000 V, and 5.000 V. The series is designed to provide excellent temperature stability and low output noise, making it suitable for demanding analog signal chain applications where precision and reliability are critical.

Replacement Considerations

Direct substitutes within the same family include the ADR4520ARZ (2.048 V), ADR4530ARZ (3.000 V), ADR4533ARZ (3.300 V), ADR4540ARZ (4.096 V), and ADR4550ARZ (5.000 V). These share similar electrical characteristics and pinouts but differ in output voltage. Verify that the replacement part's grade matches the required temperature coefficient and operating range.