REF3440QDGKRQ1

Overview

The REF3440QDGKRQ1 is an automotive-grade precision voltage reference from Texas Instruments, designed for high-reliability applications. It delivers a fixed output voltage of 4.096 V with an initial accuracy of 0.05% and a low temperature coefficient of 6 PPM/°C. The device operates within a supply voltage range of 2 V to 12 V and consumes only 72 µA of quiescent current. It supports a maximum shunt current of 10 mA and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides stable 4.096 V reference output with high initial accuracy
• Features ultra-low temperature drift for thermal stability
• Optimized for low-power consumption in battery-operated systems

Applications

• Traction inverter designs requiring precise voltage supervision
• Automotive data acquisition systems needing stable references
• High-resolution analog-to-digital converter (ADC) front-ends

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Ensure the component meets AEC-Q100 qualification requirements for your target automotive application. Cross-reference the datasheet revision date to guarantee compatibility with your design constraints and regulatory standards.

Selection Notes

Select this component when a fixed 4.096 V output is required with minimal drift over wide temperature variations. It is suitable for designs prioritizing low power consumption alongside high precision. Consider the 8-VSSOP package for space-constrained PCB layouts while ensuring adequate thermal management for the operating environment.

Part Context

This part belongs to the REF34xx-Q1 family of low-drift, low-power voltage references tailored for automotive environments. It complements other Texas Instruments signal chain components by providing a stable baseline for measurement circuits. The Q1 designation indicates compliance with automotive reliability standards, distinguishing it from commercial-grade counterparts.

Replacement Considerations

Consult the official replacement matrix for direct pin-compatible alternatives within the REF34 series. Verify that any substitute maintains the same 4.096 V output, 0.05% accuracy, and 6 PPM/°C temperature coefficient. Ensure the alternative also holds AEC-Q100 qualification if used in certified automotive systems.