SNOA957B September   2016  – June 2021 LDC0851 , LDC1001 , LDC1001-Q1 , LDC1041 , LDC1051 , LDC1101 , LDC1312 , LDC1312-Q1 , LDC1314 , LDC1314-Q1 , LDC1612 , LDC1612-Q1 , LDC1614 , LDC1614-Q1 , LDC2112 , LDC2114 , LDC3114 , LDC3114-Q1

 

  1.   Trademarks
  2. 1The Sensor
  3. 2Eddy Currents
    1. 2.1 Image Currents and Target Size
    2. 2.2 Skin Depth
    3. 2.3 Sensors Have Two Sides
    4. 2.4 LDC Interaction Through Conductor
  4. 3Target Shape
  5. 4Target Composition
    1. 4.1 Perfect Target Material Characteristics
    2. 4.2 Aluminum Targets
    3. 4.3 Copper Targets
    4. 4.4 Steel and Magnetic Material Targets
    5. 4.5 Conductive Ink
    6. 4.6 Ineffective Target Materials
  6. 5Summary
  7. 6References
  8. 7Revision History

1 Abstract

Texas Instruments’ Inductive-to-Digital Converter (LDC) technology can accurately measure with a wide variety of target sizes, shapes, and material composition. There are several target design guidelines to maximize the effectiveness of an LDC measurement system. This application note covers the relevant factors of target design that affect inductive sensing, and provides guidelines for optimizing sensing range and accuracy.