Noise-immune Capacitive Proximity Sensor System Reference Design


Design files


The FDC2214 proximity and capacitive sensing design demonstrates the use of TI's capacitive sensing technology to sense and detect the presence of various objects. The design is a complete hardware and firmware solution. The firmware  processes the data from one proximity sensor and two capacitive touch buttons via the FDC2214 to determine whether an object is in the intended sensing area. Dedicated colored LEDs light up once the device detects a target in close proximity to the board or detects a press on the buttons. The design is powered by one AA-battery.

  • Optimized to achieve maximum sensing distance and  responsive button presses
  • Standalone system powered via one AA-battery
  • Firmware includes derivative integration algorithm to process raw data
  • Demonstrates proximity and capacitive touch button applications
  • Integrates FDC2214, MSP430FR5969, and TPS61029
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Design files & products

Design files

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

TIDRI92.PDF (64 K)

Detailed schematic diagram for design layout and components

TIDRI93.PDF (280 K)

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

TIDRI94.PDF (204 K)

Detailed overview of design layout for component placement

TIDRI96.ZIP (960 K)

Files used for 3D models or 2D drawings of IC components

TIDCB90.ZIP (404 K)

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

TIDRI95.PDF (843 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Signal conditioners

FDC22122-Ch, 28-bit, capacitance to digital converter

Data sheet: PDF | HTML
Signal conditioners

FDC22144-Ch, 28-bit, capacitance to digital converter

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS61029Adjustable, 1.8-A Switch, 96% Efficient Boost Converter with Down-Mode, QFN-10

Data sheet: PDF | HTML

CSD25310Q2-20-V, P channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 23.9 mOhm

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR596916 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer

Data sheet: PDF | HTML

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Evaluation board

FDC2214PROXSEN-EVM — FDC2214PROXSEN-EVM - Proximity and Capacitive Touch Sensing Evaluation Module

The FDC2214PROXSEN-EVM demonstrates capacitive proximity and touch button sensing with the use of TI's FDC221x capacitive sensing technology. The evaluation module is a complete hardware and firmware solution that integrates the 4-channel FDC2214, MSP430FR5969 and TPS61029 into one design. The (...)

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Supported products & hardware

Supported products & hardware

Hardware development
Evaluation board
FDC2214PROXSEN-EVM FDC2214PROXSEN-EVM - Proximity and Capacitive Touch Sensing Evaluation Module

Technical documentation

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Type Title Date
Technical article Reduce power consumption in your capacitive-sensing applications PDF | HTML Jan. 19, 2016

Related design resources

Reference designs

TIDA-00220 Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design TIDA-00373 Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design

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