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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Part Number
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Status
LDC1314KEYPAD-EVM
: LDC1314 Inductance-to-Digital Converter Evaluation Module
$199.00(USD)
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TI Devices (6)
Order samples, get tools and find more information on the TI products in this reference design.
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
Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1 : Download and install the free download.
Step 2 : Download the Symbol and Footprint from the CAD.bxl file table.
Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1 : Download and install the free download.
Step 2 : Download the Symbol and Footprint from the CAD.bxl file table.
Step 3 : Open the .bxl file with the Ultra Librarian software.
You can always access the complete CAD/CAE Symbols database at https://webench.ti.com/cad/
Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download. ).
The UL Reader is a subset of the Ultra Librarian toolset that can generate, import, and export components and their attributes in virtually any EDA CAD/CAE format.
Technical documentation See the Important Notice and Disclaimer covering reference designs and other TI resources.
User guide (1) Title Type Size (KB) Date PDF 1917
24 Jun 2016
Design files (12) 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
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