• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 1253 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LDC1614: Questions about Inductive Sensing.

Angela Cheng
Prodigy 40 points
Part Number: LDC1614
Other Parts Discussed in Thread: LDC1101

Hi,

I have several questions in regards to this device and it's operations.

1. What is the raw output of the LDC1614?

2. what does the raw output represents?

3.  how the Inductance and Rp value be derived from the raw output?

4.  What does the sensor frequency represents?

Regards,

Angela


 

  1.  From the data streaming page of the GUI, there are options on what kind of data it can present. May I know what is the “Raw Code” and “Diff Code” presenting?

  2. How can they (“Raw Code” and “Diff Code”) be used?

  • 0
    TI__Genius 11340 points

    Hi Angela,

    The raw output (DATAx), where x is the channel number, represents the ratio of the sensor frequency to the reference frequency (the reference frequency comes from an internal oscillator or an externally supplied clock, and the sensor frequency is the frequency in which the LC tank oscillates). It can be computed using the following equation:

    The inductance can be calculated from raw output by first finding the sensor frequency using the equation above, and then using the equation below:

    where the capacitance is a fixed value.

    The LDC1614 actually does not measure Rp. If you would like to obtain Rp measurements, you could consider using the LDC1101.

    Hopefully that answers your question.

    Thanks,

    Jiashow

  • 0 in reply to Jiashow Ho
    Prodigy 40 points
    Thanks! May I ask a few questions in regards to the EVM as well?

    1.From the data streaming page of the GUI, there are options on what kind of data it can present. May I know what is the “Raw Code” and “Diff Code” presenting?

    2.How can they (“Raw Code” and “Diff Code”) be used?

    Regards,
    Angela
  • 0 in reply to Angela Cheng
    TI__Genius 11340 points

    Hi Angela,

    These questions have already been addressed in another thread you started.

    Thanks,

    Jiashow