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AD9176 + ADS7-V2EB7 Problems.

Category: Hardware
Product Number: AD9176

I am currently working on a DEMO using AD9176 + ADS7-V2EB7. After installing the ACE and DPG programs, setting up the hardware, and running the programs, I encounter the following issues: JESD PLL Locked, DAC PLL Locked, DAC DLL Locked, Invalid SERDES Mode Config, and both Link0 and Link1 sections are completely inactive.

Additionally, in the DPG program, even after trying various configurations, Link0 and Link1 always show up as red.

I have attempted the demo multiple times, checked the hardware thoroughly, and reinstalled the programs following the wiki instructions, but the issue persists.

Has anyone experienced similar problems? I would greatly appreciate any assistance. Thank you.

  • Hi,

    As you are following the hardware setup details and example software setup procedure provided in the AD917x-FMC-EBZ Evaluation Board User Guide wiki page,  JESD PLL Locked, DAC PLL Locked, DAC DLL Locked and logical lanes on both links should be high after SERDES status readback.

    Can you please send screenshots of ACE and DPGDownloader setups?


  • Thank you so much for your response! Here are the pictures of the DPG and ACE programs, and the board settings are as follows.

    I still haven't been able to find the root cause, so I would really appreciate any assistance you can provide.

  • Hi,

    The evaluation board user guide is using AD9172 for example software setup  procedure.

    AD9176 may not be configured using the same settings. See Table 13 JESD204B Supported Operating Modes and Interpolation Combinations on page 29 in AD9176 datasheet. 

    Can you try setting up the AD9176-FMC-EBZ evaluation board in the conditions below and let me know if it works.

    JESD Mode 4 Dual Link
    Channel Interp: 4x
    Datapath Interp: 8x
    Input Data Rate: 368.64MHz (should also be changed in DPGDownloader)
    PLL Reference Clock Frequency: 122.88MHz
    Channel NCO Shifts: ±152.5MHz
    Final NCO Shifts: 1.9875GHz
    DAC Rate:11.79648GHz
    SERDES Lane Rate:7.38Gbps

  • I really appreciate your response!

    As you suggested, I tried making the modifications as shown in the pictures, but unfortunately, there seems to be no change.

    After completing the settings, should there be any changes in the program or on the board when pressing the Stop, Download, Resync, Play buttons within the DPG program or clicking on Read SERDES status in the ACE program?

    Currently, only the LEDs on the board are blinking, and there is no other noticeable change. Thank you once again.

  • Please check if you had configured the board for direct clocking for NCO only mode. 

    When using a JESD204B link to the AD917x, you need to configure the AD917X-FMC-EBZ for on board clocking (remove C34 and C35 and populate C36 and C38) so all necessary clocks are generated using the on-board clocking IC, the HMC7044.


  • I really appreciate your response. After checking, I found that I wasn't using the NCO mode, and C36 and C38 were properly connected.

    I apologize for the continued inconvenience.

    I attach a photo for your reference.

    Thank you once again.

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