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niranjandevarajan's avatar
niranjandevarajan
Icon for New Contributor rankNew Contributor
29 days ago

DAC Interface Instability After Migrating from MAX7000 to MAX10

Hi all,

In one of our legacy designs, we used the MAX7000 (EPM7128AETC100-10N) CPLD. Due to obsolescence, we updated the design to use the MAX10 (10M04SCE144C8G).

After the migration, we are observing instability in the DAC interface during operation.

Has anyone encountered similar behavior when moving from MAX7000 to MAX10? Are there any known circuit-level differences, I/O characteristics, or design considerations we should account for to ensure stable DAC communication?

If we made some correction on RC filter its working, reason is root cause is needed for implementation.

Any guidance or insights would be greatly appreciated.

Thanks

Niranjan. D

Core Logic
Generic Io

5 Replies

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    18 days ago

    HI Niranjan,
    looking at the schematics in your latest post, it's neither clear which signals belong to DAC interface nor which kind of interface (e.g. serial, parallel) is implemented at all.

    Please clarify.

    Regards
    Frank

  • Farabi's avatar
    Farabi
    Icon for Regular Contributor rankRegular Contributor
    26 days ago

    Hello, 

     

    Could you please share your setup, what has changed etc. 

    We need to know the IO voltage standard and power. 

     

    regards,
    Farabi

    • niranjandevarajan's avatar
      niranjandevarajan
      Icon for New Contributor rankNew Contributor
      26 days ago

      Hi Farabi,

      Thanks for response

      I have attached modified new setup with MAX10 and old working setup with MAX7000 images.

       

      Old MAX7000 Schematic

       

      Regards

      Niranjan

      • AqidAyman_Altera's avatar
        AqidAyman_Altera
        Icon for Regular Contributor rankRegular Contributor
        5 days ago

        Hi Niranjan,


        Please let us know if further assistance is needed for this issue.

         

        Regards,
        Aqid