Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design


Design files


This reference design uses our capacitive-to-digital converter technology to provide a high-precision method to wake up systems when human interaction occurs. TIDA-00220 demonstrates techniques for an alternative sensor design, environmental compensation and electromagnetic interference protection.

  • Detects human proximity using a conductive nickel-print sensor that enables a flexible industrial design
  • The sensor can be copper PCB material or other conductive material
  • Reduces environmental effects through several techniques
  • Sensing range is dependent on sensor geometry (20 cm with tested hardware)
  • Low-power consumption of 6.2 mW
  • This fully tested and characterized design includes hardware design files (schematics and layout), firmware and detailed user guide with test results
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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.

TIDU519B.PDF (7138 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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

TIDC649A.ZIP (592 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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LM3630ALM3630A high-efficiency dual-String white LED driver

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Digital temperature sensors

TMP112±0.5°C 1.4V to 3.6V digital temperature sensor with I2C/SMBus in 2.56mm2 package

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ESD protection diodes

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP5907250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

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
Signal conditioners

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

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide Capacitive-Based Human Proximity Detection for System Wake-Up and Interrupt (Rev. B) Nov. 11, 2014
Technical article What are you sensing? Capacitive sensing for proximity detection and more Dec. 05, 2014

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