FDC1004QDGSRQ1

Overview

The FDC1004QDGSRQ1 is an automotive-grade, four-channel capacitance-to-digital converter designed for capacitive sensing applications. Manufactured by Texas Instruments, it operates within a supply voltage range of 2.7 V to 5.5 V and supports I2C communication interfaces. The device is housed in a 10-pin VSSOP package with a maximum junction temperature rating of 125°C and a minimum operating temperature of -40°C. It features programmable excitation frequencies and integrated charge transfer measurement capabilities to detect touch or proximity changes.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for high reliability in vehicle environments
• Four independent channels for simultaneous multi-touch or proximity detection
• Integrated charge transfer architecture eliminates the need for external analog front-end components

Applications

• Capacitive touch buttons and sliders in automotive infotainment systems
• Proximity sensing for door handle and seat occupancy detection
• Liquid level sensing in automotive fluid reservoirs

Procurement Notes

Verify the specific suffix QDGSRQ1 against the manufacturer's current datasheet to confirm the tape-and-reel packaging configuration and automotive grade designation. Ensure compatibility with your system's I2C address settings and power supply requirements before finalizing procurement orders.

Selection Notes

Select this component when designing for automotive environments requiring certified reliability and low-power capacitive sensing. Compare channel count and interface speed against other members of the FDC100x family if fewer channels are sufficient. Validate that the VSSOP-10 footprint matches your PCB layout constraints.

Part Context

This part belongs to the FDC1004 family of capacitance-to-digital converters. It shares core functionality with the commercial FDC1004 but includes extended temperature ranges and automotive-specific testing protocols. Other variants in the series include different package options like WSON or non-automotive versions without the Q1 suffix.

Replacement Considerations

Direct substitutes include the FDC1004DGSRQ1 (same function, different reel quantity) or the commercial FDC1004DGSR if automotive qualification is not required. Verify pinout compatibility and software register mapping when migrating between these variants.