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TIDA-00220

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

Design files

TIDA-00220

Design files

Overview

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.

Features
  • 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.

download Design guide — TIDA-00220
TIDU519B.PDF (7138 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00220
TIDRAQ8A.PDF (416 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00220
TIDRAQ9A.PDF (41 K)

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

download Assembly drawing — TIDA-00220
TIDRAR0A.PDF (459 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00220
TIDRAR2A.ZIP (1144 K)

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

download Gerber file — TIDA-00220
TIDC649A.ZIP (592 K)

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

download PCB layout — TIDA-00220
TIDRAR1A.PDF (2423 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

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Digital temperature sensors

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ESD protection diodes

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

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

LP5907 — 250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR5969 — 16 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer

Data sheet: PDF | HTML
Signal conditioners

FDC1004 — 4-Ch, 16-bit, capacitance to digital converter with active shield driver

Data sheet: PDF | HTML

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Software

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

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-00373 — Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design

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