REF02AZ

Overview

The REF02AZ is a precision series voltage reference IC manufactured by Analog Devices Inc., delivering a fixed nominal output of 5V. It features high initial accuracy with a maximum tolerance of ±0.3% and excellent temperature stability characterized by a maximum temperature coefficient of 8.5 ppm/°C. The device operates within an extended industrial temperature range from -55°C to 125°C and draws a typical supply current of 1.4mA. It incorporates low noise performance, specified at 15µVp-p in the 0.1Hz to 10Hz frequency band. The component utilizes an 8-lead Ceramic Dual In-Line Package (CDIP) designed for through-hole mounting.

Feature Summary

• Provides high-precision fixed voltage regulation with tight initial accuracy tolerances
• Ensures stable reference performance across wide thermal variations via low drift characteristics
• Maintains signal integrity in sensitive analog circuits through minimized low-frequency noise

Applications

• Precision data acquisition systems requiring stable reference voltages
• High-resolution analog-to-digital converter interfaces
• Temperature transducer circuits utilizing integrated sensing capabilities

Procurement Notes

Verify manufacturer authenticity and lot traceability when sourcing this component, as it is available from multiple distributors including Rochester Electronics. Confirm that the specific order suffix matches the required military or commercial screening standards. Check for RoHS compliance status relative to project requirements, noting that some variants may be leaded. Ensure the ceramic package integrity is intact upon receipt to prevent mechanical damage during installation.

Selection Notes

Select the REF02AZ when application demands exceed the stability of standard zener references but require lower power consumption than shunt types. The fixed 5V output simplifies biasing networks compared to adjustable counterparts. Consider the CDIP package constraints for PCB layout if surface-mount alternatives are preferred. Evaluate the 1.4mA quiescent current against total system power budgets, particularly in battery-operated instrumentation where efficiency is critical.

Part Context

This component belongs to the REF02 family of precision voltage references, which also includes the REF01 (10V) and REF03 (2.5V) variants. These devices share similar architectural features regarding low noise and temperature stability but differ in output voltage and specific accuracy grades. The REF02AZ specifically targets applications needing a precise 5V rail with superior thermal performance compared to general-purpose regulators.

Replacement Considerations

Direct pin-compatible substitutes include other manufacturers' versions of the REF02A such as those from Maxim Integrated or Precision Monolithics, provided they meet the same ±0.3% accuracy and 8.5 ppm/°C drift specifications. Verify that any replacement maintains the 8-CDIP package form factor and operating temperature range.