16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter

(ACTIVE) 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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Bill of Materials (BOM)

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Part Number Buy from Texas Instruments or Third Party Buy from Authorized Distributor Status

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

$49.00(USD)


Pricing may vary.



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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LDC1312  2-channel, 12-bit Inductance-to-Digital Converter with I2C for Inductive Sensing  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LDC1314  4-channel, 12-bit Inductance-to-Digital Converter with I2C for Inductive Sensing  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LDC1612  2-channel, 28-bit Inductance-to-Digital Converter with I2C for Inductive Sensing  Specialty sensors  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  MSP430 ultra-low-power MCUs  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

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
Download -
Download -
TPD4E004 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1917 24 Jun 2016 136
Design files (12)
Title Abstract Type Size (KB) Date Views
ZIP 109 24 Apr 2015 8
ZIP 77 24 Apr 2015 10
ZIP 138 24 Apr 2015 3
ZIP 220 24 Apr 2015 3
PDF 275 24 Apr 2015 4
PDF 326 24 Apr 2015 5
PDF 293 24 Apr 2015 2
PDF 74 24 Apr 2015 4
PDF 207 24 Apr 2015 3
PDF 31 24 Apr 2015 7
PDF 38 24 Apr 2015 13
PDF 60 24 Apr 2015 38
Related Tools & Software

Software (1)


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