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Original question:

LDC1612: Possible resolution for our device

LDC1612: Moisture sensitivity and target material

Egon Hirsch
Expert 3550 points
Part Number: LDC1612

My customer has additional questions:


- is the inductive measurement with the LDC sensor and PCB integrated coil sensitive to moisture?

If so, you can provide me with data.

What is the intensity of moisture that causes what change or is it independent of moisture?

Compensation is not possible for us, because we have not designed in a humidity sensor.

- Which material / steel types would you recommend to us to tune the coil ideally?

So what material should ideally be used for our spiral spring.

Best regards

Egon

  • 0
    TI__Genius 10080 points

    Hi Egon,

    The Moisture Sensitivity Level of the LDC1612 can be found in the Packing Information section of the datasheet. All LDC1612 orderable devices have an MSL rating of 1, which is considered not moisture sensitive at 85% relative humidity. Please refer to MSL Ratings and Reflow Profiles for more detailed information.

    Regarding the target material, any metal can be used as a target, but more conductive materials will give stronger inductive responses. It is recommended to use highly conductive targets such as copper or aluminum. Further information about this can be found in LDC Target Design.

    Best regards,

    Nicole

  • 0 in reply to Nicole Khoury
    TI__Expert 3550 points

    Hello Nicole,

    the question about the moisture sensitivity is not related to our LDC1612, it's related to the value of the coil.

    Best regards

    Egon

  • 0 in reply to Egon Hirsch
    TI__Genius 10080 points

    Hello Egon,

    My apologies on this.

    Unfortunately, we don't have data regarding the effect of moisture on inductance measurements. It may be possible that certain coil properties change with added moisture in the environment, but this will be hard to quantify.

    Best regards,

    Nicole