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AFE7769: Mismatch Compensation Algorithm

Intellectual 2730 points

Replies: 5

Views: 86

Part Number: AFE7769

Hi team,

I have promoted my customer AFE77XX. My customer is interested in how it compensate. The product folder description mentions that it does not need to inject any specific signal, and it does the calibration continuously. My customer has mainly two questions.

1. Does AFE77XX compensate the mismatch continuously, not only start-up?

2. How AFE77XX compensate the mismatch without test signals?

Regards,

Itoh

  • Hi Itoh-san,

    You may refer to below app note, last section for some brief intro on TX QMC

  • In reply to Kang Hsia:

    Hi Kang-san,

    Thank you for your reply.

    Answer for #1 should be "It runs compensation algorithm both start-up and on-line", right?

    But I don't understand the answer of #2.

    Could you please elaborate on that?

    Regards,

    Itoh

  • In reply to Kazuki Itoh:

    Itoh-san,

    If your question is regarding RX QMC - then it can be run continuously and doesn't need any specific test signal.

    if it's regarding TX QMC - it's run only when triggered by the host (FPGA/ASIC). We recommend it to be run with the regular data. i.e., no specific test signal are needed.

    Please email me if this doesn't answer your question adequately.

    Regards,

    satish.

  • In reply to Satish Uppathil:

    Hi Satish-san,

    Thank you for your help.

    So, you mean it uses regular data as test signal both for TX and RX?

    Regards,

    Itoh

  • In reply to Kazuki Itoh:

    Hi Itoh-san,

    Yes, the AFE777xx does use live data for calibration of QMC

    -Kang

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