Inductive Proximity Switch BoosterPack Reference Design
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Key Document


The TIDA-00563 TI Design offers highly integrated complete analog front end (AFE) inductance-to-digital converters (LDCs) optimized for use in industrial proximity sensors for contactless and robust applications such as presence detection and event counting. Inductive sensing technology provides reliable and accurate sensing even in the presence on dirt, oil or moisture making them ideal for use in harsh or dirty environment. This reference design uses a 1.8V to 3.3V high resolution, high speed inductance-to-digital converter which provides a programmable decision threshold setting and wide sensor frequency range. The scope of this design guide is to give system designers a head-start in integrating TI’s inductance-to-digital converter (LDC), ultra-low-power MCU and power management devices into their end-equipment systems. This design guide describes the principle of operation and basic design process for building a high performance and high reliable inductive proximity switch at lower cost than other competing solutions. All the relevant design files like schematics, BOM, layer plots, Altium files, Gerber and MSP430 MCU firmware are provided.

  • Inductive sensing technology
  • Non-contact detection of metallic targets at shorter ranges
  • Increased flexibility and performance without requiring analog trimming techniques
  • Operating distance: 6 mm and programmed for hysteresis of 1 mm
  • Insensitive to environmental contaminations
  • More reliable operation sensor self-diagnostic
  • Replace legacy analog only solutions

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LDC1101  1-Ch, 1.8V, 24-bit L, 16-bit Rp, inductance to digital converter for high speed 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
MSP430F5528  25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier  Microcontrollers (MCUs)  Sample & Buy View Design Kits & Evaluation Modules
TPD1E10B06  12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package  Circuit protection ICs  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)
LDC1101 Download Download
LP5951 Download Download
Download Download
MSP430F5528 Download Download
Download -
(ZQE) | 80 Download -
TPD1E10B06 Download Download
TPD2E001 Download -
Download Download
Download -
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 762 09 Dec 2015
Design files (6)
Title Type Size (KB) Date
ZIP 2264 14 Dec 2015
ZIP 1436 14 Dec 2015
PDF 1125 14 Dec 2015
PDF 177 14 Dec 2015
PDF 51 14 Dec 2015
PDF 493 14 Dec 2015
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Inductive Linear Position Sensing Booster Pack Reference Design  TIDA-00460  Reference design 

Software development (1)

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