TIDA-00509 Reference Design

Texas Instruments

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

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 solutionsCan be easily used to implement ruggedized: environmentally sealed keypad and keyboard solutions for harsh environmentsSupports simultaneous button pressesTemperature stableEasily scalable to larger key arrays
Applications
  • Pulse oximeter
  • Video recorder
  • CPAP machine
  • Currency counter
  • Calling button operating panel
  • Intrusion HMI panel
  • Portable data terminal
  • Portable monitor
  • HVAC gateway
  • Thermostat
  • CPU (PLC Controller)
  • Wearable fitness & activity monitor
  • Portable POS
  • Pachinko machine
  • Lab & field Instrumentation
  • Intrusion control panel
  • EPOS Card Reader
  • EPOS printer
  • Panel PLC
  • Multifunction relay
  • Appliances: battery charger
  • Remote annunciator
  • Power analyzer
  • DC power supply
  • AC source
  • electronic load
  • Robotic lawn mower
  • Building security gateway
  • Professional video camera
  • Eye
  • ear
  • nose & throat exam
  • Mother & neonatal care monitor
  • Processor module
Product Categories
  • Sensors

Parts

Part Number Name Companion Part
LP2985-N LP2985-N Buy Datasheet
MSP430F5528 MSP430F5528 Buy Datasheet
TPD4E004 TPD4E004 Buy Datasheet

Test Data

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Download the test file for TIDA-00509

Other Documents

Title Updated Type Size (KB)
TIDA-00509 Gerber (MCU) 24 Apr 2015 ZIP 109
TIDA-00509 Gerber (Keypad) 24 Apr 2015 ZIP 77
TIDA-00509 CAD Files (MCU) 24 Apr 2015 ZIP 138
TIDA-00509 CAD Files (Keypad) 24 Apr 2015 ZIP 220
TIDA-00509 PCB (MCU) 24 Apr 2015 PDF 275
TIDA-00509 PCB (Keypad) 24 Apr 2015 PDF 326
TIDA-00509 Assembly Drawing (MCU) 24 Apr 2015 PDF 293
TIDA-00509 Assembly Drawing (Keypad) 24 Apr 2015 PDF 74
TIDA-00509 BOM (MCU) 24 Apr 2015 PDF 207
TIDA-00509 BOM (Keypad) 24 Apr 2015 PDF 31
TIDA-00509 Schematic (MCU) 24 Apr 2015 PDF 38
TIDA-00509 Schematic (Keypad) 24 Apr 2015 PDF 60