Noise Tolerant Capacitive Touch HMI Reference Design


Design files


The Noise Tolerant Capacitive Touch HMI design (TIDM-CAPTOUCHEMCREF) is a reference design for implementing noise tolerant capacitive touch human-machine interfaces (HMIs).  It integrates TI's MSP430FR2633 microcontroller (MCU) featuring high performance CapTIvate™ touch technology with the TPS7A4533 linear regulator and UCC28910 flyback switcher.  This reference design demonstrates how to design hardware and software that can pass challenging system level tests for conducted RF immunity, electrical fast transient/burst immunity, and electrostatic discharge immunity by applying a three-sided design approach consisting of hardware design techniques, CapTIvate technology peripheral features and software signal processing.

  • MSP430™ MCU with CapTIvate™ touch technology for noise-tolerant capacitive touch sensing
  • IEC 61000-4-6 conducted noise tolerance up to 10Vrms
  • IEC 61000-4-4 electrical fast transient/burst tolerance up to ±4kV
  • IEC 61000-4-2 electrostatic discharge tolerance up to ±8kV contact discharge and ±15kV air discharge
  • Mutual and self capacitance sensing panels with universal AC and 12V DC power supplies for multiple test configurations
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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.


Detailed schematic diagram for design layout and components


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

TIDRMV9.ZIP (1278 K)

Detailed overview of design layout for component placement

TIDRMW1.ZIP (2362 K)

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

TIDCCG3.ZIP (1523 K)

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

TIDRMW0.ZIP (2407 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

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

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

UCC28910700V Flyback switcher with constant-voltage constant-current and primary-side control

Data sheet: PDF | HTML
Digital isolators

ISO7221CDual-channel, 1/1, 25-Mbps digital isolator

Data sheet: PDF | HTML
I2C general-purpose I/Os (GPIOs)

TCA953516-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt & config registers

Data sheet: PDF | HTML

Start development


Technical documentation

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Type Title Date
* User guide Noise Tolerant Capacitive Touch Human Machine Interfaces Design Guide Mar. 09, 2016
User guide CapTIvate Noise Immunity Design Guide Jul. 19, 2016
More literature CapTIvate Technology Guide Jul. 19, 2016
More literature Noise Immunity in Capacitive Touch Designs with MSP MCUs Featuring CapTIvate Technology With Texas Instruments Jul. 19, 2016

Related design resources

Reference designs

TIDM-CAPTIVATE-THERMOSTAT-UI Capacitive Touch Thermostat UI with MSP MCUs Featuring CapTIvate Technology Reference Design

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