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Output sawtooth wave to AD9144

This is a question about the operation of the AD9144.
My customers are evaluating the AD9144.
My customer is trying to output sawtooth waves from AD9144.
T = 200 nS, + 100 count → -100 count
The customer inputs the code and evaluates the output waveform.
Strangely, the output slope bounces small around 0 count.
Customers suspect this as miscounts.
Is this due to the nature of T-DAC?
Do you have any views?
Please advise me.

 

Is this phenomenon called MIDSCALE GLITCH?
Where should I check to isolate it from mistakes in circuit design?

Best regards

Parents
  • Hi
    My customer confirmed this matter using EVB.
    Please see the attached file.

    My customers claim that something similarly occurs in the EVB.
    When I posted, the customer had trouble in controlling the FPGA.
    Now the customer overcomes the trouble, the EVB and customer's board are using the same input procedure.

    I am asking customers to evaluate in the frequency domain.
    However, there are no results yet.
    Please let me know your view on something.

    Customers also care about crosstalk.
    This is crosstalk coming from other channels of the AD9144.
    Please also tell me about your opinion about this.

    I apologize to you for 2's comp and DPG Downloader that it is not progressing.
    I would like to know about 2's comp and DPG Downloader.

    Best regards

    attachment.pdf
Reply
  • Hi
    My customer confirmed this matter using EVB.
    Please see the attached file.

    My customers claim that something similarly occurs in the EVB.
    When I posted, the customer had trouble in controlling the FPGA.
    Now the customer overcomes the trouble, the EVB and customer's board are using the same input procedure.

    I am asking customers to evaluate in the frequency domain.
    However, there are no results yet.
    Please let me know your view on something.

    Customers also care about crosstalk.
    This is crosstalk coming from other channels of the AD9144.
    Please also tell me about your opinion about this.

    I apologize to you for 2's comp and DPG Downloader that it is not progressing.
    I would like to know about 2's comp and DPG Downloader.

    Best regards

    attachment.pdf
Children
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