REF3140AQDBZRQ1

Overview

The REF3140AQDBZRQ1 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 ±0.2%. The device operates within an input voltage range of 4.146 V to 5.5 V and delivers a maximum output current of 10 mA. Key electrical specifications include a temperature coefficient of 20 ppm/°C, low noise characteristics with 53 µVp-p (0.1 Hz to 10 Hz) and 78 µVrms (10 Hz to 10 kHz), and a supply current of 135 µA. It is housed in a SOT-23-3 package and certified for AEC-Q100 standards.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle environments.
• High precision voltage regulation with ±0.2% initial accuracy and low temperature drift of 20 ppm/°C.
• Low noise performance suitable for sensitive analog signal processing applications.

Applications

• Automotive sensor signal conditioning circuits
• Data acquisition systems requiring stable reference voltages
• Analog-to-digital converter (ADC) reference inputs

Procurement Notes

Verify the specific suffix 'QDBZRQ1' against official Texas Instruments documentation to confirm the exact package type, tape-and-reel quantity, and quality certification level. Ensure compatibility with your board layout regarding the SOT-23-3 footprint and thermal requirements. Cross-reference the datasheet revision date to ensure all latest electrical parameter updates are considered during component selection.

Selection Notes

Select this component when a precise 4.096 V reference is required in space-constrained automotive designs. The SOT-23-3 package offers a compact solution compared to larger alternatives. Consider the 135 µA supply current and 10 mA load capability to ensure it meets the power budget and drive requirements of the downstream circuitry without exceeding thermal limits.

Part Context

This part belongs to the REF3140 family of series voltage references from Texas Instruments. The 'Q' prefix indicates automotive qualification, while 'A' denotes the ±0.2% accuracy grade. The DBZR suffix specifies the SOT-23-3 surface-mount package with reel packaging. This family is designed to provide stable, low-noise references for precision measurement applications in harsh environments.

Replacement Considerations

Compatible substitutes within the same family include REF3140AIDBZR for industrial grade or other accuracy grades like REF3140B if tighter tolerance is needed. Verify pinout compatibility and thermal performance before substitution. Alternative packages such as SOT-23-5 may require schematic and layout modifications.