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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

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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