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MCU-PLUS-SDK-AM263X: DAC for higher frequencies in AM263x-LP

Tej_1441
Prodigy 180 points
Part Number: MCU-PLUS-SDK-AM263X

I want to generate a sine wave from the dac ( AM263x-LP ).
This is dac specification mentioned in datasheet.



what they meant by 200KHz output filter (whether it is limit of launchpad kit or IC) and how evaluation kit can be used to generate higher output frequencies  sine wave upto 1MHz?

  • 0
    TI__Mastermind 22953 points

    Hey Tej_1441,

    The AM263x DAC module was integrated to support 100Hz to 100KHz.

    The use case for this DAC is to generate test signal for system level test/debug. Another potential use case is to generate control voltages for pass devices external to AM263x. As such, design efforts for the DAC were mainly focused on the DC linearity, gain error, and accuracy, with less emphasis on high frequency performance.

    I am syncing with the design owner here to provide additional feedback regarding the 200KHz output filter mentioned in the SNR row of the datasheet.

    Best Regards,

    Zackary Fleenor

  • 0 in reply to Fleenor
    Prodigy 180 points

    Hii Fleenor,

    1. How 100KHz limit is estimated. Is there any document for the same?
    2. Could you suggest any IC which have similar ADC structures like 4 to 5 channels with simultaneous sampling at 4 MSPS and an DAC with 1MSPS signal generation.

  • 0 in reply to Fleenor
    Prodigy 180 points

    Hii Fleenor,
    I am waiting for your comment on my previous post, which is
    "
    1. How 100KHz limit is estimated. Is there any document for the same?
    2. Could you suggest any IC which have similar ADC structures like 4 to 5 channels with simultaneous sampling at 4 MSPS and an DAC with 1MSPS signal generation.
    "

  • +1 in reply to Tej_1441
    TI__Mastermind 22953 points

    Hey Tej,

    1) This is just the parameter laid forward by our analog design team. I will make sure this information is clearly reflected in the TRM document.

    2) I am not aware of any single IC that will support this use case. My initial suggestion would be to use a dedicated DAC IC and utilize some communication protocol between the AM263x and the DAC to support your DAC requirements.

    Best Regards,

    Zackary Fleenor