16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter
TIDA-00509
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Key Document

Description

The LDC1314's unique inductive sensing capability is used to implement a contactless, 16 button, multi-function keypad. It uses standard PCB technology and easily manufactured components to implement a low cost solution.

This reference design uses the LDC1314.  This reference design can also be used with LDC1312, LDC1612 and LDC1614.

Features
  • Contactless buttons, with superior reliability over electrical/mechanical contact solutions
  • Can be easily used to implement ruggedized, environmentally sealed keypad and keyboard solutions for harsh environments
  • Supports simultaneous button presses
  • Temperature stable
  • Easily scalable to larger key arrays

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Schematic/Block Diagram

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Test Data

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Design Files

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LDC1314KEYPAD-EVM :
LDC1314 Inductance-to-Digital Converter Evaluation Module

$199.00(USD)


Pricing may vary.



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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LDC1312  2-Ch, 12-bit, general purpose inductance to digital converter  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LDC1314  4-Ch, 12-bit, general purpose inductance to digital converter  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LDC1612  2-Ch, 28-bit, high-resolution Inductance to digital converter  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LDC1614  4-Ch, 28-bit, high-resolution Inductance to digital converter  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LP2985-N  150-mA, 16-V, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5528  25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, Comparator, DMA, UART/SPI/I2C, USB, HW Multiplier  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LDC1312 Download
LDC1314 Download
LDC1612 Download
LDC1614 Download
LP2985-N Download Download
MSP430F5528 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1917 24 Jun 2016
Design files (12)
Title Type Size (KB) Date
ZIP 109 24 Apr 2015
ZIP 77 24 Apr 2015
ZIP 138 24 Apr 2015
ZIP 220 24 Apr 2015
PDF 275 24 Apr 2015
PDF 326 24 Apr 2015
PDF 293 24 Apr 2015
PDF 74 24 Apr 2015
PDF 207 24 Apr 2015
PDF 31 24 Apr 2015
PDF 38 24 Apr 2015
PDF 60 24 Apr 2015
Related Tools & Software

Software development (1)


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