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    • Evaluation Module for High Accuracy Inductive Switch with Stacked Coils
    • Evaluation Module for High Accuracy Inductive Switch with Stacked Coils


    The LDC0851EVM (Evaluation Module) demonstrates the use of inductive sensing technology to accurately detect the presence of a conductive target object passing a fixed threshold. The module includes a perforated and interchangeable 4-layer PCB where both the sensing coil as well as the reference coil are stacked for reduced system size. The presence of a conductive object passing the fixed threshold is indicated by a green LED and therefore no MCU is needed. A resistive potentiometer can adjust the switching threshold easily for flexibility and quick system prototyping.

    The LDC0851 is a close range inductive switch ideal for contactless and robust applications such as presence detection, event counting, and simple buttons. The switch is triggered when a conductive object comes within close proximity of the sensing coil. Hysteresis is included to ensure a reliable switching threshold immune to mechanical vibration. The differential implementation prevents false triggering over environmental factors such as temperature variation or humidity effects.

    • Open/Close Switches
      • Home Security and Tamper Detection
      • Printers
      • Personal Electronics
    • Event Counting
      • Fan Speed RPM Detection
      • Rotary Encoder
      • Flow Meters
      • Incremental Knob / Dial
    • Simple Buttons
      • Industrial Keypads
      • Personal Electronics
    • Industrial Proximity Switch


    • 1.8V - 3.3 V
    • < 5% Switching Accuracy
    • Push/Pull Output
    • Temperature and other environmental variation compensation

    Ships With

    • Evaluation Board
    • USB Cable

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