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TMS320F28379D: ADC sampling

Prasad Rao
Prodigy 220 points

Part Number: TMS320F28379D

Dear Sir/Madam,

In TMS 320F28379D controller, if i am sampling simultaneously 6 ADC channels. I would like to know the maximum sampling frequency of  ADC and one more concern is during simultaneous sampling, will the ADC sample all the channels at same sampling rate or there is any decrease in the sampling rate with increase in number of channels while i am using code composer studio for coding

  • 0
    TI__Mastermind 30185 points

    Hello Prasad,

    I will look into the details of this more and try to have a response by tomorrow.

    Best regards,

    Omer Amir

  • 0 in reply to Omer Amir
    TI__Mastermind 30185 points

    Hello Prasad,

    To see the minimum timing required to obtain a sample, you can refer to the Specifications chapter within the datasheet. The ADC Electrical Timing and Data section and the ADC Characteristics section in the datasheet provide the maximum ADC clock rate as well as the minimum number of conversion cycles required. These values depend on whether you are using 12-bit single-ended or 16-bit differential mode. You can also take a look at the ADC Timings section within the reference manual. The maximum sampling frequency you can achieve depends on the setup of your system (if there's anything happening in the background between conversions, this will slow down the maximum sampling rate achievable).

    The sampling rate should not decrease while using multiple channels, but the conversions may not happen simultaneously. There can be some number of cycles between one SOC converting and another, depending on how the SOCs are triggered. Feel free to reach out if you have issues with this.

    Best regards,

    Omer Amir

  • 0 in reply to Omer Amir
    Prodigy 220 points

    Dear Omer,

    Thanks for the response, If i have an further queries related to it , I will post question again in the forum

  • 0 in reply to Prasad Rao
    TI__Mastermind 30185 points

    I will close the thread for now then, feel free to post again with any questions.