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Inductive Sensing 32-Position Encoder Knob Reference Design using the LDC0851
TIDA-00828
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Key Document

Description

An inductive sensing based incremental encoder knob design can provide a robust and low-cost interface for control inputs.  It can reliably operate in environments which have dirt, moisture, or oil which would pose issues for alternate sensing technologies. This solution requires no magnets.

Features
  • High reliability, contactless, encoder implementation suitable for dirty, wet, and other challenging environments
  • Scalable to support multiples of 4 positions/rotation
  • Minimal MCU requirements
  • No permanent magnets required; operates effectively even with magnetic or electrical environmental interference

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LDC0851  Differential inductive switch for MCU-less applications  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
LP5951  150-mA, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5500  25 MHz MCU with 8KB Flash, 4KB SRAM, comparator, DMA, UART/SPI/I2C, USB, timer, HW multiplier  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TPD2E001  Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LDC0851 Download Download
LP5951 Download Download
Download Download
MSP430F5500 Download Download
TPD2E001 Download -
Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 2281 28 Jan 2016
Design files (6)
Title Type Size (KB) Date
ZIP 564 30 Mar 2016
ZIP 554 30 Mar 2016
PDF 1195 30 Mar 2016
PDF 178 30 Mar 2016
PDF 215 30 Mar 2016
PDF 282 30 Mar 2016
More literature (1)
Title Type Size (KB) Date
ZIP 3877 30 Mar 2016
Related Tools & Software

Reference Designs (2)

Name Part Number Tool Type
1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter  TIDA-00508  Reference design 
Inductive Sensing 32-Position Encoder Knob Reference Design using the LDC1312/LDC1314  TIDA-00615  Reference design 

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