Inductive Touch Stainless Steel Keypad Reference Design for Waterproof/Noise Immune HMI Applications TIDA-01102 (ACTIVE)

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Key Document

Description

This 16-button stainless steel keypad, which utilizes TI's inductive touch technology, demonstrates highly sensitive buttons on a single piece of 0.6mm thick stainless steel metal.  The design utilizes a MUXed approach to implement many buttons with a single LDC1614. The design is applicable to any metal or non-metal surface completely enclosing the system, enabling a sleek waterproof (IP67) design.

Features
  • Completely enclosed design with 0.6mm thick stainless steel panel as the button interface
  • High sensitivity to measure metal movement in the sub-micrometer resolution
  • Measures force applied to implement multiple functions on a single button
  • Robust contactless design immune to water, dirt, dust, and other environmental contaminants
  • Low-cost design using PCB coils as the sensor

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DRV2605L  Haptic Driver for ERM and LRA with Built-In Library and Smart Loop Architecture  Actuator drivers  Sample & Buy View Design Kits & Evaluation Modules
LDC1614  4-channel, 28-bit Inductance-to-Digital Converter with I2C for Inductive Sensing  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LP2985-N  Micropower 150mA Low-Noise Ultra-Low-Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5528  25 MHz MCU with Integrated USB Phy, 128KB Flash, 8KB RAM, 12Bit/10 Channel ADC, 32BIT HW Multiplier  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPD4E004  4-Channel ESD Protection Array for High-Speed Data Interfaces  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
TS3A5017  14-Ohm Dual SP4T Analog Switch 3.3-V/2.5-V Analog Multiplexer/Demultiplexer  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV2605L Download -
Download Download
LDC1614 Download
LP2985-N Download Download
MSP430F5528 Download Download
Download -
Download -
TPD4E004 Download Download
TS3A5017 Download Download
Download -
Download Download
Download Download
Download Download
Download Download
Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Datasheet (1)
Title Type Size (KB) Date
PDF 1812 25 Mar 2018
User guides (1)
Title Type Size (KB) Date
PDF 6183 26 Jul 2017
Design files (8)
Title Type Size (KB) Date
ZIP 793 24 Jul 2017
ZIP 752 24 Jul 2017
ZIP 157 24 Jul 2017
ZIP 1443 24 Jul 2017
PDF 2312 24 Jul 2017
PDF 305 24 Jul 2017
PDF 65 24 Jul 2017
PDF 592 24 Jul 2017
More literature (1)
Title Type Size (KB) Date
PDF 116 25 Oct 2017

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