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About the Min value of SCLK and sampling frequency of ADS7958.

Satoshi
Guru 19605 points
Other Parts Discussed in Thread: ADS7958, ADS7948

About the Min value of SCLK and sampling frequency of ADS7958, if there is information, please let me know.
※Only the Max value was indicated to the datasheet.

Thank you for your consideration.

  • 0
    Guru 19605 points

    How is a reply about the contents asked the other day?

    For example,ADS7948 of an imitation are the following spec.
    0.4MHz(MIN)~40MHz(MAX)
    May a Min value consider ADS7958 to be 1/100 of Max values?

    Thank you for your consideration.

  • 0 in reply to Satoshi
    TI__Expert 4535 points

    Hello expert,

    Can you kindly update Kawabata-san on this request? Thank you for your cooperation.

    Thank you and best regards,

    Daisuke KAWASAKI

  • 0 in reply to daisuke kawasaki
    TI__Expert 5705 points

    Hello Kawasaki-san,

    Sorry for the delay but I believe your question has been answered on the following post:

    https://e2e.ti.com/support/data_converters/precision_data_converters/int-precision_data_converters/f/75/p/322456/1126731.aspx

    Thank you.

    Regards,

    Harsha Munikoti

  • 0 in reply to Harsha Munikoti
    Guru 19605 points

    Dear Harsha Munikoti-san

    Thank you for the reply.

    Moreover, the Min value of a sampling frequency is also information?

    Since I cannot go into Internal E2E, please teach, if I have information.

     

    Best regards,

    Satoshi

  • 0 in reply to Satoshi
    TI__Expert 5705 points

    Hello Satoshi-san,

    Sorry I did not realize the link I had sent you was for an internal post. Anyway the question in the post is very similar to yours - how slow can SCLK be on the ADS795x? The reply states that SCLK frequency can be as low as 200KHz without causing performance degradation. For frequencies much lower, the longer conversion time causes the ADC's linearity to degrade due to non-linear voltage droop at the ADC input caused by leakage current through the input sample-and-hold capacitor.

    Best Regards,
    Harsha