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ADS1294R: ADS1294R

Arvind Kumar
Prodigy 20 points
Part Number: ADS1294R

Hello 

As per the part specifications, the internal oscillator clock frequency can have the frequency deviation of +/- 2%  (in the operating temperature range of 0- 70 C), please share the co relation between clock frequency and the sampling frequency.

e.g. with the clock frequency deviation of +/- 2% , what will be the resultant deviation in the sampling frequency.

  • 0
    TI__Mastermind 19815 points

    Hi,

    Are you asking "how does the internal clock frequency deviation/accuracy affect the modulator(sampling) frequency?"

    If yes, that info is not disclosed/shared/provided.

    Thanks.

  • 0 in reply to ChienChun Yang
    Prodigy 20 points

    Hello 

    Yes , we want to know the impact of internal clock frequency deviation/accuracy on the sampling frequency.

    These information details are important for our application.

    As mentioned above , that this information is not disclosed, then can you please share some test method to co relate the impact of clock frequency deviation on the sampling frequency.

    Can you share some design experiments to co relate this impact. 

  • 0 in reply to Arvind Kumar
    TI__Mastermind 19815 points

    Hi,

    TI usually doesn't provide that support.

    However some non-official suggestion and long experiments/processes(and may require special equipment and environment) you could try

    e.g. 

    at 0 degree, record the following - inject some signal(e.g. sinusoid) with frequency from low to high, and for each injected signal frequency, also select data rate from low to high.

    at 5 degree, repeat above.

    at 10 degree, repeat above.

    and so on to 70 degree.

    Then, you should have a lot of data for you to do comparison and data analysis to see how temperature could affect the sampling, data rate and signal integrity and SNR, etc.

    Thanks.