REF3450QDBVRQ1

Overview

The REF3450QDBVRQ1 is an automotive-grade series precision voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 5 V with an initial accuracy of 0.05% and a temperature coefficient of 6 ppm/°C. The device operates within an input voltage range up to 12 V and supports a maximum shunt current of 10 mA. It functions reliably across a temperature range from -40°C to +125°C. Packaged in a VSSOP-8 surface-mount case, it meets AEC-Q100 qualification standards for automotive applications.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• High precision performance characterized by low initial accuracy error and minimal drift over temperature variations
• Compact small-footprint surface-mount packaging designed for space-constrained circuit board layouts

Applications

• Automotive sensor signal conditioning circuits requiring stable reference voltages
• Data acquisition systems utilizing analog-to-digital converters in automotive modules
• Precision measurement instrumentation deployed in harsh automotive operating conditions

Procurement Notes

Verify the specific suffix QDBVRQ1 matches the required automotive grade and package type. Confirm that the VSSOP-8 footprint aligns with your PCB design constraints. Ensure the 5 V output specification meets your system requirements. Check for any recent product change notifications regarding manufacturing updates or material composition changes before finalizing procurement orders.

Selection Notes

Select this component when high stability and low drift are critical for automotive data conversion tasks. The 6 ppm/°C temperature coefficient ensures consistent performance across wide thermal ranges. Consider the 10 mA load capability for driving subsequent stages without significant regulation loss. The VSSOP-8 package offers a compact solution compared to larger through-hole alternatives while maintaining precision characteristics.

Part Context

This part belongs to the REF34xx-Q1 family of low-drift, low-power voltage references designed specifically for automotive electronics. The family includes various output voltages and packages, sharing common features like high accuracy and robustness. The REF3450 variant specifically targets applications needing a precise 5 V rail. Its integration into power management IC categories highlights its role in stabilizing supply rails for sensitive analog components.

Replacement Considerations

Direct substitutes include other REF34xx-Q1 variants with different output voltages or packages, such as REF3430QDBVRQ1 for 3 V output in SOT-23-6. Non-series replacements require matching the 5 V output, 0.05% accuracy, and 6 ppm/°C drift specifications. Verify pin compatibility and thermal performance if substituting with non-Texas Instruments parts.