REF02BU

Overview

The REF02BU is a precision fixed voltage reference IC manufactured by Texas Instruments, providing a nominal output of +5V. It features an initial accuracy of ±10mV and a maximum temperature coefficient of 10ppm/°C over the industrial range of –40°C to +85°C. The device operates from a wide supply voltage range of 8V to 40V with a maximum quiescent current of 1.4mA. Key electrical specifications include line regulation of 0.01%/V max and load regulation of 0.008%/mA max. It incorporates short-circuit protection and supports an external trim adjustment range of ±6%.

Feature Summary

• Provides a stable 5V reference output with high initial accuracy and low temperature drift.
• Features internal short-circuit protection for enhanced reliability under fault conditions.
• Supports external output trimming via a dedicated terminal to compensate for system errors.
• Operates efficiently with low supply current requirements across a wide input voltage range.

Applications

• Precision regulators
• Digital voltmeters
• A/D and D/A converters
• Test equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest Package Option Addendum to confirm package type and material finish. Ensure compatibility with moisture sensitivity level (MSL) ratings during storage and soldering processes. Confirm that the selected variant meets the required industrial temperature range specifications for the intended application environment.

Selection Notes

Select the REF02BU when a precise 5V reference is required with tight initial accuracy and low temperature drift. Consider this component for applications demanding excellent line and load regulation characteristics. Evaluate the need for external trimming capabilities if system-level calibration is necessary to offset potential errors in the measurement chain.

Part Context

The REF02BU belongs to the REF02 series of precision voltage references from Texas Instruments. This family includes variants such as the REF02AU and REF02AP, which share similar functional characteristics but differ in package style and initial accuracy grades. The series is designed for applications requiring stable voltage references in portable instrumentation and data acquisition systems.

Replacement Considerations

Direct replacements within the same series include REF02AU, REF02AP, and REF02BP. Verify pinout compatibility and package dimensions before substitution. Note that different suffixes may indicate variations in initial accuracy or packaging format rather than functional changes.

FAQ

Can the output voltage of the REF02BU be adjusted?

Yes, the REF02BU features a Trim terminal that allows the output voltage to be adjusted over a ±6% range using an external potentiometer without significantly affecting temperature stability.

What is the maximum input voltage for the REF02BU?

The REF02BU can operate with an input supply voltage ranging from 8V to a maximum of 40V.