ADXL345 Internal clock ppm

Hi,

I was wondering what is the PPM of the internal clock? i.e. if I want a sample rate of 50 Hz, what actual rate could I be getting due to the error of the clock?

Thank you

  • 0
    •  Analog Employees 
    on Aug 21, 2019 1:10 AM

    Hi,

    The  ADXL345 uses an RC oscillator for clock generation with an accuracy of +/-10% over temperature and accounting for any drift over time.
    If you can measure the time between DATA_READY interrupts in your set-up, you may be able to get a more accurate sample rate.

    Regards,
    Mark