REF02AU

Overview

The REF02AU is a precision series voltage reference integrated circuit manufactured by Texas Instruments. It provides a fixed output voltage of 5 V with an initial accuracy of ±0.2%. The device operates within an input voltage range of 8 V to 40 V and draws a maximum supply current of 1.4 mA. It features a temperature coefficient of 15 ppm/°C and supports a maximum load current of 21 mA. The component is housed in an 8-SOIC surface-mount package and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Delivers high-precision fixed voltage output with tight initial tolerance
• Maintains stable performance over wide operating temperature ranges
• Supports high load current capability for demanding applications

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• High-resolution instrumentation systems requiring stable bias voltages
• Calibration equipment needing low-drift reference standards

Procurement Notes

Verify the specific suffix designation, as variants such as REF02AU/2K5 or REF02AUE4 may exist with different packaging or compliance statuses. Confirm active lifecycle status directly with the manufacturer or authorized distributors, as older revisions like REF02AUG4 are marked as obsolete. Ensure the required package type matches the design constraints before ordering.

Selection Notes

Select this component when a 5 V reference with ±0.2% accuracy is required. Consider the 15 ppm/°C temperature coefficient against application drift requirements. Verify that the 8–40 V input range aligns with the system power supply. Compare load current needs against the 21 mA maximum limit to ensure adequate drive capability for the intended circuit topology.

Part Context

The REF02AU belongs to the REF02 family of precision series voltage references from Texas Instruments. This family includes variants with different output voltages and accuracies, such as the REF102 which provides a 10 V output. These devices are designed for general-purpose precision applications where stability and low noise are critical. The SOIC-8 package allows for compact PCB integration in modern electronic designs.

Replacement Considerations

Public confirmed substitute part numbers include REF02BU/2K5 and REF02AUE4. Note that REF02AUG4 is listed as obsolete. Cross-reference specifications carefully to ensure compatibility with input voltage ranges and package dimensions.