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Temperature Compensation LDC 1614

Chitrang Talaviya
Prodigy 30 points

I am currently working on the LDC 1614 inductive sensor. I am measuring the displacement using these sensors. Right now, as the temperature increases the single inductive coil data is decreasing.   I am trying to compensate this temperature change so that this change will not affect my displacement reading.  Can you share some insight about how I can perform the temperature compensation?

Thank you,

Chitrang Talaviya

@Cratus Tech 

  • 0
    TI__Genius 13650 points
    Hi Chitrang,
    with a C0G/NP0 capacitor and a correctly configured sensor drive current (www.ti.com/.../snoa950.pdf) this effect is usually very small compared to the code change that the target movement presents.

    If you are working on a high-precision application in which the temperature effect is higher than what your system accuracy requirements allow, then you could either perform a differential measurement with a second coil (similar to www.ti.com/.../TIDA-00508), or use a separate temperature sensor.
  • 0 in reply to Ben Kasemsadeh
    Prodigy 30 points
    We require a higher precision up to 50-100 micron. Do we have to introduce the temperature term in our hypothesis. The temperature effect on our displacement function is smaller but the individual coil reading is highly decreasing. Also at the temperature above 50 degree Celsius my displacement range is decreased to -8 mm to 8 mm. In normal temperature the displacement range is -12 to 12 mm.

    Thank you,
    Chitrang
    @CRATUS TECH