TIDA-00314
Touch on Metal Buttons With Integrated Haptic Feedback Reference Design
TIDA-00314
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
Automotive
Industrial
- Blood glucose meter
- Continuous blood glucose monitor - aggregator unit
- E-bike HMI
- Electronic hospital bed & bed control
- Fetal monitor
- Keypad & UI module
- Laser Stereolithography
- Mobile POS
- Off-highway vehicles HMI & display systems
- Optical Switch Proximity Sensor
- Panel Extension
- Portable ultrasound
- Premium ultrasound
- Pulse oximeter - clinical
- Pulse oximeter - personal
- Stand-alone remote IO
- Standard ultrasound
- Telemetry & RTUs
- Wearable fitness & activity monitor
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
TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
Data sheetESD & 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 sheetHaptic motor drivers
DRV2605L — Haptic driver for ERM/LRA with 2-V operation, waveform library & auto-resonance tracking
Data sheetHaptic motor drivers
DRV2605L-Q1 — Automotive Haptic driver for ERM/LRA with 2-V operation, waveform library & auto-resonance tracking
Data sheetHumidity sensors
HDC1000 — Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor
Data sheetHumidity sensors
HDC1010 — ±2% low-power digital humidity and temperature sensor in WCSP
Data sheetInductive sensor AFEs
LDC1312 — 2-Ch, 12-bit, general purpose inductance to digital converter
Data sheetInductive sensor AFEs
LDC1314 — 4-Ch, 12-bit, general purpose inductance to digital converter
Data sheetInductive sensor AFEs
LDC1612 — 2-Ch, 28-bit, high-resolution Inductance to digital converter
Data sheetInductive sensor AFEs
LDC1614 — 4-Ch, 28-bit, high-resolution Inductance to digital converter
Data sheetLinear & low-dropout (LDO) regulators
LP5907 — 250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable
Data sheetMSP430 microcontrollers
MSP430F5528 — 25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier
Data sheetPiezo drivers
DRV2667 — Haptic driver for piezo with integrated 105-V boost converter, waveform memory & DAC
Data sheetStart development
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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