Inductive Sensing 32-Position Encoder Knob Reference Design using the LDC1312/LDC1314
TIDA-00615
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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
  • Minimum MCU requirements
  • No permanent magnets required; operates effectively even with magnetic or electrical environmental interference

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CD74HC4511  High Speed CMOS Logic BCD-to-7 Segment Latch/Decoder/Driver  Specialty logic  Sample & Buy View 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
LP5951  Micropower 150mA Low-Dropout (LDO) CMOS Voltage 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  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPD2E001  Low-Capacitance 2-Channel +/-15kV 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)
CD74HC4511 Download -
Download Download
Download -
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LDC1312 Download
LDC1314 Download
LP5951 Download Download
Download Download
MSP430F5528 Download Download
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TPD2E001 Download -
Download Download
Download -
Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 3508 28 Jan 2016
Design files (6)
Title Type Size (KB) Date
ZIP 3208 01 Mar 2016
ZIP 867 01 Mar 2016
PDF 1406 01 Mar 2016
PDF 175 01 Mar 2016
PDF 214 01 Mar 2016
PDF 624 01 Mar 2016
Related Tools & Software

Reference Designs  ( 1 )

Name Part Number Tool Type
1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter  TIDA-00508  TI Designs

Software (1)



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