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TDC7200: READING CALIBRATION DATA , mode 1 measurement.

ohad kowalski
Prodigy 90 points
Part Number: TDC7200

Hi

 

I'm using TDC7200. (Mode 1 measurement)

Every time I'm reading TIME1, CALIBRATION1, CALIBRATION2 to calculate the TOF.

 

 

The 1st question is : do i need to read every time the CALIBRATION1 AND CALIBRATION2 ? Is There any solution that i don't need to read it every time? Is It possible to read CALIBRATION1 and CALIBRATION2 only every 1 sec or 10 sec ?

 

The 2nd is : if i need to read CALIBRATION1 and CALIBRATION2 can I read just the first 16 bits ? Or less? Because my MCU is 16-bit and the calculation cost a lot of time!

 

tnx a lot

Ohad

  • 0
    TI__Mastermind 31655 points
    Hello,

    No, you do not need to read the calibration data for every measurement cycle. However, it is recommended to provide maximum accuracy. If the ambient temperature around your system remains very stable, you can read the calibration cycle periodically and use those same values to calculate the normLSB for all subsequent measurements until the next calibration data read. Just be aware that you will sacrifice accuracy to do this.

    The data is passed through MSB first, so you could just read the 16 most significant bits of the calibration data if you wanted to save time. However, again you will sacrifice accuracy to do this.

    Regards,
  • 0 in reply to Scott Cummins
    Prodigy 90 points
    Hi Scott

    Thanks a lot!

    ohad.