Proximity Sensing of up to 30CM Range with >15dB SNR and Robust Capacitive Touch Reference Design

(ACTIVE) TIDA-00474

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Key Document

Description

Capacitive sensing based touch button implementation is commonly used, for the user interfaces in home appliances. Solutions based on low measurement resolution, suffer from achieving reliable operation and faster user response. The TI design TIDA-00474 hardware platform demonstrates the mitigation of these challenges using EMI-resistant, high-resolution (up to 28 bits), high-speed capacitance-to-digital converters. The board is designed and tested in cooker hood environment. Implementation details and test results are provided for capacitive button sensing and long range proximity sensing (up to 30cm).

Features
  • 2 channels of high resolution (28bits) proximity sensing, providing tested hardware platform for the implementation of gesture recognition
  • 6 capacitive touch keys implementation for robust touch detection against moisture and other disturbances
  • EMI resistance architecture on each capacitive sensing channel to protect the detection against common noise sources
  • Proximity sensing implementation and test results with copper on PCB and ITO (indium tin oxide) based implementations
  • Low power consumption during standby. Less than 1mA current consumption on DC power supply during standby
  • Highly integrated LED driver circuit on board with digital dimming, over current protection, over temperature protection and adjustable under voltage-lock-out functions
  • Provision for temperature sensing and humidity sensing
  • Fully tested for cooker hood equipment

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (8)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
FDC2214  Noise-immune Capacitive Sensing Solution for Proximity Sensing   Capacitive Sensing  Sample & Buy View Design Kits & Evaluation Modules
HDC1050  Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor  Sensing Products  Sample & Buy View Design Kits & Evaluation Modules
LMT01  0.5°C Accurate 2-pin Temperature Sensor with a Pulse Train Interface  Temperature Sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430G2553  MSP430G2x53, MSP430G2x13 Mixed Signal Microcontroller  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
TLV704  24-V Input Voltage, 150-mA, Ultralow IQ Low-Dropout Regulators  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPD2E2U06  Dual-Channel High-Speed ESD Protection  Circuit Protection  Sample & Buy Not Available
TPD6E001  Low-Capacitance 6-Channel +/-15-kV ESD Protection Array for High-Speed Data Interfaces  Circuit Protection  Sample & Buy View Design Kits & Evaluation Modules
TPS92513  1.5-A Buck LED Driver with Integrated Analog Current Adjust  LED Driver  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2703 12 May 2016 884
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 223 04 May 2016 261
ZIP 1083 04 May 2016 51
PDF 738 02 Oct 2015 80
PDF 285 02 Oct 2015 36
PDF 286 02 Oct 2015 44
PDF 792 02 Oct 2015 266
Related Tools & Software

Reference Designs (2)

Software (1)




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