REF02BU/2K5G4

Overview

The REF02BU/2K5G4 is a precision series voltage reference IC 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 8 mA. The component is housed in an 8-pin SOIC package, suitable for surface mount installation, and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Delivers high-precision fixed voltage output with tight initial accuracy tolerance
• Utilizes series reference architecture for stable regulation under varying conditions
• Designed for low power consumption with minimal supply current requirements

Applications

• Precision analog-to-digital converter (ADC) reference sources
• High-resolution digital-to-analog converter (DAC) excitation
• Calibration standards for measurement instrumentation

Procurement Notes

Verify the specific suffix G4 indicates RoHS compliance status against the manufacturer's latest documentation. Confirm the tape and reel packaging configuration matches the required handling equipment. Ensure the SOIC-8 footprint dimensions align with the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a stable 5 V reference is required with strict accuracy limits. Consider the 15 ppm/°C temperature drift for thermal environments. Evaluate the 8 mA drive capability against the circuit load demands. Verify compatibility with the available input voltage headroom above the minimum 8 V requirement.

Part Context

This part belongs to the REF02 family of precision voltage references from Texas Instruments. The family is characterized by its series regulator topology, offering superior line and load regulation compared to shunt types. The REF02BU variant specifically denotes the 5 V output version packaged in standard surface-mount formats for industrial applications.

Replacement Considerations

Direct pin-compatible substitutes include the REF02AU/2K5G4 for alternative accuracy grades or the REF102AU/2K5G4 for a 10 V output option. Cross-vendor equivalents such as the AD587KRZ from Analog Devices may serve as functional replacements if electrical parameters are validated.