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ADS7142: How to set continuous sampling to 140-ksps

Timsen
Expert 1660 points
Part Number: ADS7142

Dear all：

      1， I plan to use CC3220 to communicate with ADS7142 through I2C to support continuous sampling up to 40-ksps.How do I set it？

      2，If the ADS7142 cannot support continuous sampling, are there any other devices recommended？

  • 0
    TI__Guru* 97835 points

    Hi,


    Our ADS7142 expert is out of the office for a couple of days. I did however have a chance to talk to her. To do some sort of continuous sampling you would use the manual mode to configure and get the data. 40-kSPS should be an achievable rate.

    Joseph Wu

  • 0 in reply to Joseph Wu
    Expert 1660 points

    Hi Joseph：

           Thanks for your reply. 

    But use the manual mode to configure continuous sampling，Need to provide continuous SCL signal, this unless hardware add SCL clock chip？

    I've tried using software that doesn't seem to work？ so let's see if we can generate SCL signals from hardware.

    In addition, if the hardware generates SCL signals, and the data we read is also through I2C, it will conflict with the SCL again.
    Could this problem be solved?

  • 0 in reply to Joseph Wu
    Expert 1660 points

    But use the manual mode to configure continuous sampling，Need to provide continuous SCL signal, this unless hardware add SCL clock chip？

    I've tried using software that doesn't seem to work？ so let's see if we can generate SCL signals from hardware.

    In addition, if the hardware generates SCL signals, and the data we read is also through I2C, it will conflict with the SCL again.
    Could this problem be solved?

  • 0 in reply to Timsen
    TI__Mastermind 25020 points

    Hello,

    creating the SCL signal through hardware will pose issues, mostly sync issues.

    Would you explain why your software did not work to communicate with the device?

    If you would like to explore other devices, would you please let me know what are the requirements? From this post, I assume a 2 channel device, I2C with minimum throughput rate of 40kSPS?

    Regards

    Cynthia

  • 0 in reply to Cynthia
    Expert 1660 points

    Hi Cynthia:

          thanks for your reply.

    Using the software method, we also need to trigger the CLK, which we don't want to do in this way.
    other devices，Only those that can support continuous sampling above 140kSPS, 2-channel, simple operation, or above this specification are acceptable to us.

    thank  you!

  • 0 in reply to Timsen
    TI__Mastermind 25020 points

    Timsen,

    Every device will need a SCL signal to output data, even if it is continuous or not. Data transfer cannot happen without a SCL signal.

    I would suggest reaching out to the CC3220 team and solve your software issue, or confirm that the CC3220 can/cannot provide a SCL signal and how to do so.

    Regards

    Cynthia