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FDC2214: Principle of capacitance measurement of FDC2214

Hyun Kyu Park
Prodigy 50 points
Part Number: FDC2214

Hello everyone.

There was some question that I cannot handle it by myself.

I want to know exact principle of capacitance measurement of FDC 2214.

Rough principle was found that it is measuring a resonance frequency of LC tank, which has its own resonance frequency determined by L and C.

However, it is really hard to find the way to measure the resonance frequency.

Does it put a AC voltage input in sequential with various number of frequency, and measure the output alternating current?

It does not seem to be efficient and fast to measure.

It would be a great help if you let me know about this part.

Thank you.

  • 0
    TI__Genius 17440 points
    Hi Hyun Kyu Park,

    Unfortunately this information is proprietary and I'm unable to share details about the internal functions of the part. The most detailed information about how the part functions can be found in section 9 of the datasheet. It includes functional block diagrams and high-level descriptions of the device's operation.

    Regards,