LDC1314 inductance-to-digital converter evaluation module: 16 button keypad


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The LDC1314KEYPAD evaluation module implements a 16 snap dome button keypad using only one LDC1314 to multiplex all 16 buttons.

This design uses the LDC1314 but can also be replicated with the LDC1312, LDC1612 and LDC1614.

  • 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
Inductive sensor AFEs
LDC1314 4-Ch, 12-bit, general purpose inductance to digital converter


Linear & low-dropout (LDO) regulators
LP2985 150-mA, 16-V, low-dropout voltage regulator with enable
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  1. Order the LDC1314KEYPAD-EVM
  2. Download the LDC1314KEYPAD-EVM user's guide

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Evaluation board

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

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GUI for evaluation module (EVM)

TIDA-00509 LDC1314 Inductive Keypad GUI and Firmware Installer — TIDCA92.ZIP (6561KB)

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TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
Certificate LDC1314KEYPAD-EVM EU Declaration of Conformity (DoC) 02 Jan 2019
Design guide 16-Button Keypad Using the LDC1314 Inductance-to-Digital Converter Design Guide (Rev. A) 24 Jun 2016

Related design resources

Reference designs

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

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