TIDA-00220
Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design
TIDA-00220
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
Industrial
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
TIDRAQ8A.PDF (416 K)
Detailed schematic diagram for design layout and components
TIDRAQ9A.PDF (41 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRAR0A.PDF (459 K)
Detailed overview of design layout for component placement
TIDRAR2A.ZIP (1144 K)
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
TIDRAR1A.PDF (2423 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
Backlight LED drivers
LM3630A — LM3630A high-efficiency dual-String white LED driver
Data sheetDigital temperature sensors
TMP112 — ±0.5°C 1.4V to 3.6V digital temperature sensor with I2C/SMBus in 2.56mm2 package
Data sheetESD & surge protection ICs
TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
Data sheetLinear & low-dropout (LDO) regulators
LP5907 — 250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable
Data sheetMSP430 microcontrollers
MSP430FR5969 — 16 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer
Data sheetSignal conditioners
FDC1004 — 4-Ch, 16-bit, capacitance to digital converter with active shield driver
Data sheetStart development
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 | ||
| More literature | TIDA-00220 Firmware | Sep. 25, 2014 |
Related design resources
Reference designs
REFERENCE DESIGN
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