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TIDM-1021
Liquid Tolerant Capacitive Touch Keypad Reference Design
TIDM-1021
Overview
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
Industrial
- Analytical lab instrumentation
- Automotive interface & communications HIL tester
- Cooker hood
- Cooking top
- Digital multimeter (DMM) - benchtop
- Digital multimeter (DMM) - handheld
- Dishwasher
- Flat panel
- HMI panel
- Key panel
- Near infrared (NIR) spectrometer - benchtop
- Oscilloscope (DSO) - benchtop
- Oven
- Portable field instrumentation
- Pulse oximeter
- Source measurement unit (SMU)
- Washer & dryer
- Weigh scale
- Wired control
- Wired smart door access control
- Wireless control
Personal electronics
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.
TIDUE90.PDF (2368 K)
Reference design overview and verified performance test data
TIDRWU6.PDF (130 K)
Detailed schematic diagram for design layout and components
TIDRWU7.PDF (227 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRWU8.PDF (104 K)
Detailed overview of design layout for component placement
TIDRWV0.ZIP (433 K)
Files used for 3D models or 2D drawings of IC components
TIDCET5.ZIP (452 K)
Design file that contains information on physical board layer of design PCB
TIDRWU9.PDF (829 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MSP430 microcontrollers
MSP430FR2533 — Capacitive Touch MCU with 16 touch IO (24 sensors), 16KB FRAM, 2KB SRAM, 19 IO, 10-bit ADC
Data sheet: PDF | HTMLMSP430 microcontrollers
MSP430FR2633 — Capacitive Touch MCU with 16 touch IO (64 sensors), 16KB FRAM, 4KB SRAM, 19 IO, 10-bit ADC
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Liquid Tolerant Capacitive Touch Keypad Reference Design | PDF | HTML | Jul. 31, 2018 |
| User guide | CapTIvate™ Technology Guide | Jan. 17, 2018 |
Related design resources
Software development
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REFERENCE DESIGN
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