REF3440QDBVRQ1

Overview

The REF3440QDBVRQ1 is an automotive-grade series voltage reference IC manufactured by Texas Instruments. It provides a fixed output voltage of 4.096 V with an initial accuracy of ±0.05% and a maximum temperature coefficient of 6 ppm/°C. The device operates within an input voltage range up to 12 V and draws a quiescent current of 95 µA. It supports a maximum load current of 10 mA and functions reliably across a junction temperature range of -40°C to +125°C. Packaged in a compact SOT-23-6 surface-mount case, it meets AEC-Q100 qualification standards for automotive applications.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards
• Low drift performance with a maximum temperature coefficient of 6 ppm/°C
• High precision with an initial accuracy of ±0.05%
• Compact SOT-23-6 package design for space-constrained layouts

Applications

• Automotive sensor signal conditioning circuits
• Data acquisition systems requiring stable reference voltages
• Analog-to-digital converter (ADC) reference inputs
• Precision measurement instrumentation in vehicle electronics

Procurement Notes

Verify the specific suffix QDBVRQ1 matches the required automotive grade and packaging configuration. Confirm that the 4.096 V output aligns with system requirements. Ensure thermal management considerations are addressed for operation within the specified -40°C to +125°C range. Check for moisture sensitivity levels if storage conditions exceed factory limits. Validate compatibility with existing PCB footprints for the SOT-23-6 package.

Selection Notes

Select this component when a stable, low-drift reference is needed for automotive environments. The 4.096 V output suits many ADC interfaces directly. Consider the 95 µA quiescent current for battery-powered applications. The ±0.05% accuracy ensures minimal calibration needs. Evaluate the SOT-23-6 size against available board space constraints compared to larger packages.

Part Context

This part belongs to the REF34-Q1 family of low-power, small-footprint voltage references designed specifically for automotive use. It shares characteristics with other variants like the REF3430QDBVRQ1 but offers a different fixed output voltage. The series emphasizes low noise and high stability to support precision analog circuits in harsh automotive electrical environments.

Replacement Considerations

Direct substitutes include other REF34-Q1 variants such as REF3430QDBVRQ1 or REF3425QDBVRQ1 if different voltage levels are acceptable. Verify pinout compatibility and thermal performance before substitution.