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TIDA-00314

Touch on Metal Buttons With Integrated Haptic Feedback Reference Design

Design files

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
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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.

download Design guide — TIDA-00314
TIDU613D.PDF (13786 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00314
TIDRCF2A.PDF (301 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00314
TIDRCF3A.PDF (89 K)

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

download Assembly drawing — TIDA-00314
TIDRCF4A.PDF (224 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00314
TIDRCF6A.ZIP (843 K)

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

download CAD/CAE symbol — TIDA-00314
TIDRCQ4.ZIP (248 K)

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

download Gerber file — TIDA-00314
TIDC848A.ZIP (436 K)

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

download PCB layout — TIDA-00314
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

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
ESD & surge protection ICs

TPD2E2U06 — Dual 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: PDF | HTML
Haptic motor drivers

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

Data sheet: PDF | HTML
Haptic motor drivers

DRV2605L-Q1 — Automotive Haptic driver for ERM/LRA with 2-V operation, waveform library & auto-resonance tracking

Data sheet: PDF
Humidity sensors

HDC1000 — Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor

Data sheet: PDF | HTML
Humidity sensors

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

Data sheet: PDF | HTML
Inductive sensor AFEs

LDC1312 — 2-Ch, 12-bit, general purpose inductance to digital converter

Data sheet: PDF | HTML
Inductive sensor AFEs

LDC1314 — 4-Ch, 12-bit, general purpose inductance to digital converter

Data sheet: PDF | HTML
Inductive sensor AFEs

LDC1612 — 2-Ch, 28-bit, high-resolution Inductance to digital converter

Data sheet: PDF | HTML
Inductive sensor AFEs

LDC1614 — 4-Ch, 28-bit, high-resolution Inductance to digital converter

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP5907 — 250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F5528 — 25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet: PDF | HTML
Piezo drivers

DRV2667 — Haptic driver for piezo with integrated 105-V boost converter, waveform memory & DAC

Data sheet: PDF | HTML

Start development

Software

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

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