TIDA-00314

Touch on Metal Buttons With Integrated Haptic Feedback Reference Design

TIDA-00314

Design files

Overview

This reference design uses our inductance-to-digital converter technology to provide a high-precision method to sense button presses on a metal surface and our haptic drivers provide high-quality haptics feedback to the user. TIDA-00314 demonstrates techniques for system design, environmental compensation and electromagnetic interference protection.

Watch the TIDA-00314 overview video on the touch-on-metal buttons with integrated haptic feedback.

Features
  • Replaces mechanical buttons with high-resolution inductive-sensing based touch-on-metal detection
  • Customizable haptic feedback and waveforms provide a high quality user experience
  • Programmable force touch button sensitivity (from light touch to hard press)
  • One continuous sheet of metal sealed and grounded against electromagnetic interference (EMI), water, oil, dirt and other contaminants
  • Works with gloves, underwater (if sealed) and in harsh environments
  • Can be used for pressure and multi-step button press sequences
  • Three button options omplemented:
    20-mm button
    3 mm x 10 mm (two buttons)
    3-mm button
  • Alternative button configurations can be implemented with different mechanical designs

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU613D.PDF (13786 K)

Reference design overview and verified performance test data

TIDRCF2A.PDF (301 K)

Detailed schematic diagram for design layout and components

TIDRCF3A.PDF (89 K)

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

TIDRCF4A.PDF (224 K)

Detailed overview of design layout for component placement

TIDRCF6A.ZIP (843 K)

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

TIDRCQ4.ZIP (248 K)

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

TIDC848A.ZIP (436 K)

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

TIDRCF5A.PDF (1753 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

ESD & surge protection ICs

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD2E2U06Dual 1.5-pF, 5.5-V, ±25-kV ESD protection diode with 5.5-A 8/20-uS surge rating for USB 2.0

Data sheet document-pdfAcrobat PDF open-in-new HTML
Haptic motor drivers

DRV2605LHaptic driver for ERM/LRA with 2-V operation, waveform library & auto-resonance tracking

Data sheet document-pdfAcrobat PDF open-in-new HTML
Haptic motor drivers

DRV2605L-Q1Automotive Haptic driver for ERM/LRA with 2-V operation, waveform library & auto-resonance tracking

Data sheet document-pdfAcrobat PDF
Humidity sensors

HDC1000Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor

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

HDC1010±2% low-power digital humidity and temperature sensor in WCSP

Data sheet document-pdfAcrobat PDF open-in-new HTML
Inductive sensor AFEs

LDC13122-Ch, 12-bit, general purpose inductance to digital converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Inductive sensor AFEs

LDC13144-Ch, 12-bit, general purpose inductance to digital converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Inductive sensor AFEs

LDC16122-Ch, 28-bit, high-resolution Inductance to digital converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Inductive sensor AFEs

LDC16144-Ch, 28-bit, high-resolution Inductance to digital converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

LP5907250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

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

MSP430F552825 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

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

DRV2667Haptic driver for piezo with integrated 105-V boost converter, waveform memory & DAC

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

Start development

Software

Support software

TIDA-00314 Software (Rev. A) – TIDC849A.ZIP (17983 K)

Technical documentation

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Type Title Date
* Design guide Touch on Metal Buttons With Integrated Haptic Feedback (Rev. D) May 13, 2016
Technical article Inductive sensing: rethink the button Dec. 16, 2015
Technical article Inductive sensing: How far can I sense? Jun. 17, 2015
Technical article Solving the problems of mechanical buttons and capacitive touch sensors Feb. 06, 2015

Support & training

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Videos