TIDA-01239

Proximity Switch With CapTIvate Teach Button Reference Design

TIDA-01239

Design files

Overview

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

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.

TIDUCO7.PDF (1862 K)

Reference design overview and verified performance test data

TIDRS54.PDF (471 K)

Detailed schematic diagram for design layout and components

TIDRS55.PDF (65 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRS56.PDF (99 K)

Detailed overview of design layout for component placement

TIDRS58.ZIP (682 K)

Files used for 3D models or 2D drawings of IC components

TIDCDP7.ZIP (630 K)

Design file that contains information on physical board layer of design PCB

TIDRS57.PDF (665 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

IO-Link & digital I/Os

TIOL111IO-Link device transceiver with integrated surge protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear Hall-effect sensors

DRV5053High voltage (up to 38V), linear hall effect sensor

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430FR2633Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Proximity Switch With CapTIvate Teach Button Reference Design Aug. 09, 2017

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