REF5045AQDRQ1

Overview

The REF5045AQDRQ1 is an automotive-grade series voltage reference IC manufactured by Texas Instruments. It provides a fixed output voltage of 4.5 V with an initial accuracy of ±0.1% and a temperature coefficient of 8 ppm/°C. The device operates within an input voltage range of 4.7 V to 18 V and supports a maximum shunt current of 10 mA. It features low noise performance, specified at 13.5 µVpp from 0.1 Hz to 10 Hz. The unit consumes 1.2 mA of supply current and functions reliably across a temperature range of -40°C to +125°C. It is housed in an 8-SOIC package and holds AEC-Q100 qualification.

Feature Summary

• AEC-Q100 qualified for automotive applications ensuring reliability under harsh conditions
• Low noise performance suitable for precision analog signal chains
• High initial accuracy with minimal drift over temperature variations

Applications

• Automotive data acquisition systems requiring stable voltage references
• Precision analog-to-digital converter (ADC) front-ends
• Medical instrumentation with strict stability requirements

Procurement Notes

Verify the complete part number including suffixes such as DRQ1 to ensure correct packaging and automotive qualification status. Confirm that the specific revision matches the design requirements. Check for moisture sensitivity level compliance during storage and handling. Ensure the supplier provides valid traceability documentation for automotive grade components. Validate that the component meets RoHS3 specifications if required by the assembly process.

Selection Notes

Select this component when a fixed 4.5 V reference with high precision is needed for automotive environments. Consider the 1.2 mA supply current for power budget constraints. Evaluate the 8 ppm/°C temperature coefficient against system drift tolerances. Ensure the input voltage remains above 4.7 V for proper regulation. Compare noise specifications with other REF50xx variants if lower noise is critical.

Part Context

This device belongs to the REF50xxA-Q1 family of precision voltage references designed for automotive use. It shares the same SOIC-8 footprint and general functionality with other members like REF5025AQDRQ1 and REF5020AQDRQ1, differing primarily in output voltage. The family emphasizes low noise and high accuracy for demanding measurement applications.

Replacement Considerations

REF5045AIDR is a non-automotive equivalent with similar electrical characteristics but lacks AEC-Q100 qualification. Verify if automotive grade certification is mandatory before substituting.