TIDA-00506

Automotive Capacitive Proximity Kick to Open Detection Reference Design

TIDA-00506

Design files

Overview

This reference design showcases proximity sensitivity using our FDC1004 evaluation module (EVM) for an automotive kick-to-open application within a plastic bumper. This design also showcases test results that include exposure to mud and water on the bumper to determine the impact of common environmental factors.

Features
  • Input offset capacitance up to 100 pF. The large offset-capacitance capability allows for the use of remote sensors and long cables. It also allows tracking and compensating for environmental changes over time (temperature and humidity).
  • A two-channel shield drives up to 400 pF. The large shield drive can reduce environmental interferences such as EMI, noise and proximity from undesired targets and help focus the sensing direction of a capacitive sensor, thus enhancing its resolution.
  • Effective resolution (noise floor) of 16 bits allows far object sensing with a small, inexpensive conductive sensor.
  • Four measurement channels allow multiple applications where one channel can be used as an environmental sensor to track and compensate for environmental (temperature and humidity) changes.
  • Small 3-mm x 3-mm footprint enables using the device in space-constrained applications

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU822.PDF (1052 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRD67.PDF (171 K)

Detailed schematic diagram for design layout and components

TIDRD68.PDF (108 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC943.ZIP (258 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

Signal conditioners

FDC10044-Ch, 16-bit, capacitance to digital converter with active shield driver

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* User guide TIDA-00506 Design Considerations Mar. 04, 2015
Test report TIDA-00506 Test Results Mar. 04, 2015

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