ESI + LDC Inductive Linear Position Sensing Reference Design
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Key Document


Typical implementations of linear position measurements use expensive rare-earth magnets. To lower the overall system cost, this reference design describes the implementation of using the industry’s first inductance-to-digital converters (LDC) from TI for linear position sensing without the use of any expensive rare-earth magnets. This reference design also describes the implementation of the ultra-low power two chip solution for inductive linear position sensors by using TI's extended scan interface (ESI) module on the MSP430(TM) microcontrollers (MCUs) and LDC1612 chip. By combining the ESI module on MSP430 MCU and the LDC technology, the reference design provides the designer a low-cost and low-power inductive linear position sensing solution.

  • Ultra-low power
  • Non-contact detection and measurement
  • Insensitive to environmental contaminations
  • High resolution and accuracy
  • Increased Flexibility and Performance without requiring analog trimming techniques

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Design Files

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MSP-EXP430FR6989 :
MSP430FR6989 LaunchPad Development Kit


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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LDC1612  2-Ch, 28-bit, high-resolution Inductance to digital converter  Specialty sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR6989  Rotary Sensing MCU with extended scan interface, 128KB FRAM, AES, LCD for flow meters  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LDC1612 Download
MSP430FR6989 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 7730 31 Dec 2015
Design files (5)
Title Type Size (KB) Date
ZIP 58 10 May 2016
ZIP 526 10 May 2016
ZIP 156 10 May 2016
PDF 54 10 May 2016
PDF 181 10 May 2016
Related Tools & Software

Hardware development (1)

Name Part Number Tool Type
MSP430FR6989 LaunchPad Development Kit  MSP-EXP430FR6989  Development kit 

Software development (1)

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