REF5040AQDRQ1

Overview

The REF5040AQDRQ1 is an automotive-grade, low-noise, very low drift, precision voltage reference from Texas Instruments. It provides a fixed output of 4.096 V with an initial accuracy of 0.05% and a temperature coefficient of 3 ppm/°C. The device operates within a supply voltage range of 2.7 V to 18 V and supports a maximum shunt current of 10 mA. It functions reliably across an extended operating temperature range from -40°C to +125°C. Designed for high-precision applications, it features low power consumption and is housed in an 8-pin VSSOP package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for long-term reliability
• Ultra-low noise performance suitable for sensitive analog signal chains
• Very low drift characteristics ensuring stable output over wide temperature variations
• Precision initial accuracy maintaining tight tolerance without external trimming

Applications

• Automotive data acquisition systems requiring high stability
• High-resolution analog-to-digital converter (ADC) references
• Medical instrumentation with strict precision requirements
• Industrial process control loops demanding accurate voltage benchmarks

Procurement Notes

Verify the specific suffix 'QDRQ1' confirms automotive grade and tape-and-reel packaging. Confirm AEC-Q100 certification status for your specific application requirements. Check for any recent product change notices affecting pinout or electrical specifications. Ensure compatibility with your PCB footprint for the 8-VSSOP package. Validate that the 4.096 V output matches your system design needs.

Selection Notes

Select this component when automotive reliability and low noise are critical. Compare against standard grade parts if cost is a primary constraint and automotive qualification is not required. Consider the 8-VSSOP package size constraints during layout. Evaluate the 3 ppm/°C drift against your system's total error budget. Ensure the 10 mA load capability meets your downstream circuit demands.

Part Context

This part belongs to the REF50xxA family of precision voltage references. It shares core electrical characteristics with non-automotive variants like the REF5040AIDR but includes enhanced testing for automotive environments. The family is designed for applications requiring superior stability and low noise compared to standard bandgap references.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified voltage references from Texas Instruments such as the REF5030AQDRQ1 or REF5025AQDRQ1 for different voltage outputs. Cross-vendor equivalents require matching AEC-Q100 status, 4.096 V output, and 8-VSSOP package.