Proximity Switch With CapTIvate Teach Button Reference Design

(ACTIVE) TIDA-01239

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Key Document

Description

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.

Features
  • 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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Bill of Materials (BOM)

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV5053  2.5 to 38 V Bipolar Output Hall Effect Sensor Family  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR2633  MSP430 MCU with CapTIvate technology - the lowest power, most noise-immune capacitive touch  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
TIOL111  IO-Link Device Transceivers 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
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MSP430FR2633 Download -
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TIOL111 Download -

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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 1862 09 Aug 2017 13
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 630 09 Aug 2017 10
ZIP 682 09 Aug 2017 16
PDF 665 09 Aug 2017 12
PDF 99 09 Aug 2017 13
PDF 65 09 Aug 2017 11
PDF 471 09 Aug 2017 26
Related Tools & Software

Reference Designs  ( 2 )

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
MSP CapTIvate MCU Development Kit  MSP-CAPT-FR2633  Evaluation Modules & Boards 

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