Proximity Switch With CapTIvate Teach Button Reference Design
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Key Document


This reference design demonstrates the implementation of a capacitive touch button using an MSP430™ MCU with CapTIvate™ technology in an ultra-small 3.5-mm width PCB. This button is commonly used as a set button in proximity switches. In combination with the highly integrated IO-Link PHY, a flexible output, either PNP or NPN, is realized. This SIO stage protects against reverse polarity, ESD, EFT, and surge, allowing the design to meet IEC 61000-4 standards. The Hall sensor with an analog output signal enables flexible usage by touching the distance of the magnetic object with the capacitive touch button. The analog signal is captured by the integrated ADC of the MCU.

  • Capacitive Touch Button With CapTIvate Technology:
    • Support for Touch Through Metal and Water Rejection Designs
    • Self and Mutual Capacitance Electrodes
    • Enables Increased immunity to Power Line, RF, and Other Environmental Noise
  • Highly Integrated Output Driver:
    • NPN, PNP, IO-Link (Optional)
    • 3.3-V or 5.0-V LDO; 20 mA
    • Reverse Polarity Protection
    • ESD, EFT, and Surge Protection According to IEC 61000-4
    • 50- to 350-mA Configurable Output Current Limit
  • 3.5mm width PCB

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV5053  High voltage (up to 38V), linear hall effect sensor  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR2633  Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TIOL111  IO-Link device transceiver with integrated surge protection  Interface  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV5053 Download Download
MSP430FR2633 Download -
Download -
Download Download
TIOL111 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1862 09 Aug 2017
Design files (6)
Title Type Size (KB) Date
ZIP 630 09 Aug 2017
ZIP 682 09 Aug 2017
PDF 665 09 Aug 2017
PDF 99 09 Aug 2017
PDF 65 09 Aug 2017
PDF 471 09 Aug 2017
Related Tools & Software

Reference Designs (2)

Name Part Number Tool Type
IO-Link Firmware Update Reference Design Leveraging MSP430 FRAM Technology  TIDA-00461  Reference design 
Smart Solenoid Driver with Predictive Maintenance Reference Design  TIDA-01250  Reference design 

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