Liquid Tolerant Capacitive Touch Keypad Reference Design
TIDM-1021
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Key Document

Description

The Liquid Tolerant Capacitive Touch Keypad Design (TIDM-1021) is a reference design for implementing liquid tolerant capacitive touch human-machine interfaces (HMIs).  It integrates TI's MSP430FR2633 microcontroller (MCU) featuring high performance CapTIvate™ touch technology with an optimized sensor layout design and software.  This reference design demonstrates how to design capacitive touch hardware and software that can work reliably under liquid influence and pass challenging tests for conductive noise immunity.

Features
  • MSP430™ CapTIvate  MCU for Liquid-Tolerant Capacitive-Touch Sensing
  • Advanced Human Machine Interface Design with 12-Button Keypad
  • 12 LEDs Driven by MSP430  CapTIvate MCU for Backlighting
  • Passes IEC 61000-4-6 Conducted Noise Immunity Test at 3 Vrms Stress Level
  • No False Touch Detection and Accurately Detect Touched Button under IPX5 Rating Test with AC Power

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430FR2533  Capacitive Touch MCU with 16 touch IO (24 sensors), 16KB FRAM, 2KB SRAM, 19 IO, 10-bit ADC  Microcontrollers (MCU)  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 (MCU)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430FR2533 Download -
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MSP430FR2633 Download -
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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 4147 09 Dec 2019
User guides (2)
Title Type Size (KB) Date
17 Jan 2018
PDF 2273 31 Jul 2018
Design files (6)
Title Type Size (KB) Date
ZIP 452 31 Jul 2018
ZIP 433 31 Jul 2018
PDF 829 31 Jul 2018
PDF 104 31 Jul 2018
PDF 227 31 Jul 2018
PDF 130 31 Jul 2018
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Noise Tolerant Capacitive Touch HMI Reference Design  TIDM-CAPTOUCHEMCREF  Reference design 

Hardware development (1)

Name Part Number Tool Type
CapTIvate™ Design Center GUI for MSP430™ Capacitive Sensing MCUs  MSPCAPTDSNCTR  GUIs for evaluation modules (EVM) 

Software development (1)



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