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Connecting DAC34H84EVM + FMC-DAC-Adaptor + ML605

Martin Mataln
Intellectual 295 points
Other Parts Discussed in Thread: DAC34H84, DAC3283, FMC-ADC-ADAPTER, FMC-DAC-ADAPTER

Hello!

I am using the Xilinx ML605 board to build up a real-time demonstrator (in principle a waveform generator with some extra features) with the FMC-DAC-Adaptor (latest rev. D I think) to connect the DAC34H84EVM.

Because I’m relatively new to FPGA design especially in the field high-speed data transmition over the FMC interconnect headers, I have not really an idea how to get this device running… So I’m very appreciating any help I can get.

I have also searched for this Avnet Speedway Kit but about this TSW4200 + the ML605 but I was not really successful…

Is this TSW4200 + ML601 Speedway Design (DAC interface part) partly or fully compatible to the DAC34H84EVM? So it would be a good starting point to ask Avnet for more information.

I know that you don’t provide source code and so on, so can please someone contact me to help me with finding a local Avnet which can provide me more details about addressing your DAC34H84EVM.

Another Question: The FMC-ADC adapter (rev. D) is LPC right? I have only the HPC port free on the ML605. I know that the connector itself is the same but is there anything I have to care for in my design, or is it fully compatible. Should be, right?

My Mail:  martin.mataln-ee@infineon.com

Thank you very much for any help!

  • 0
    TI__Guru 69364 points

    Hello Martin,

    I will private message you to get you in contact with your local Avnet support. In the mean time, the DAC34H84 GUI software includes various example configuration files to help you get started. If you need a particular configuration example, I can help you set it up as well.

    http://www.ti.com/litv/zip/slac483a

    The Speedway Design may be a good start, and Avnet may be able to help you with the tweaks since the Speedway's DAC3283 interface is different than the 32-bit LVDS DDR interface of DAC34H84.

    I am assuming you are asking about the FMC-DAC-adapter instead of the FMC-ADC-adapter on your last question. For the ML605 EVM, the FMC-DAC-adapter should fit on the HPC connector while the FMC-ADC-adapter fit on the LPC connector. This is primarily due to the orientation of the connector edge. See attached photo for detail. 

    -KH

    ML605 Connection.pdf
  • 0 in reply to Kang Hsia
    TI__Guru 69364 points

    Hello Martin,

    Please find the Avnet support information from the Avnet Europe website:

    http://www.ts.avnet.com/emea/contact_us.html

    You can select the region near you and contact the local sales team. The local Avnet FAE should be able to get your started. They can also work with us if further support for the DAC is needed. 

    -KH

  • 0
    Prodigy 225 points

    Hi Martin,
    Did you finished your code? I am now starting to work on the same thing as a PhD student and would appreciate if you could share the VHDL or Verilog code.

    Thanks,

    Michel

    michel.anty@gmail.com

  • 0 in reply to michel.anty
    Intellectual 295 points

    Hi!

    Due to company policy I can’t share any source code with you but interfacing any of TI’s High Speed DAC is very simple in principle…

     

    If you are using any of the Xilinx FPGAs read Xilinx Application Note XAPP1071

    http://www.xilinx.com/support/documentation/application_notes/xapp1071_V6_ADC_DAC_LVDS.pdf

    There you will also find some code and a reference design is downloadable from Xilinx HP.

     

    The principle is also the same for other FPGA Vendors.

     

    Studying the Xilinx SERDES documentation and Application notes might also be helpful!

     

    Read carefully your TI’s DAC documentation and you have done have the way!

     

    Greetings

    Martin

  • 0 in reply to Kang Hsia
    Prodigy 225 points

    Hi Kang,

    I have a ML605, FMC DAC revision D and DAC34H84 EVM. I noticed that this can't be connected properly. Actually, the boards need to bend in order to connect and they will probably going to disconnect when using them. Is that a problem of revisions?

    See the picture attached.

    Thanks,

    Ivan

    Ivanm  

  • 0 in reply to michel.anty
    Intellectual 295 points

    Hi!

    After doing a lot of tests with the ML605+TI DACs it sometimes happened that the connection between the different header cards opened. This manly happened due to connecting and disconnecting cables within my laboratory setup. Some time ago, I decided to put everything on a small board and fixed it with spacers and screws at the provided holes. Since then, I had no problems…

    Greetings!

  • 0 in reply to Martin Mataln
    Prodigy 225 points

    Hi, thanks for the answer! I don't know if I described it clearly... The power connector of the ML605 and the power connection of the DAC34H84 revision D are to close to each other and in order to connect, I need to bend the connector and because of that also the DAC.

    My DAC board is completely different then the one on Kang's photo - it is bigger.

    So, you also had that issue and you just fixed it with screws and let the boards bend?

    Kang, what is this revision on your picture in the PDF from the upper post?

    Thanks!

  • 0 in reply to michel.anty
    Intellectual 295 points

    I have had the same problem with the Rev A. DAC34H84. I have re-soldered the DAC34H84 power connector from the lower to the upper side to fix this problem. I'm not sure if this is possible for the Rev D. too...

  • 0 in reply to michel.anty
    TI__Guru 69364 points

    Hi Ivan,

    We have now created a beta version of FMC-DAC-adapter board that is longer in length so the DAC34H84 board can fit nicely with the ML605. Since the LVDS traces are longer, we have not done enough verification on the bus timing to see if the board is good. All the traces are matched to 100ohm and are delay matched. If you would like, I can ping you offline and ship you the board to try it out.

    -Kang

  • 0 in reply to Kang Hsia
    Prodigy 20 points
    Hi Kang,
    what is the current situation with the adapters - Are the longer ones available? (I see only rev. A mentioned on the product's page)
    Is it required also for the 7-series boards like AC701 in combination with DAC34H84EVM rev. D?
    thx,
    Jiri
  • 0 in reply to Jiri Slovak
    TI__Guru 69364 points

    Hi Jiri,

    We currently recommend that you use extension cables from SAMTEC to use along with the FMC-DAC adapters if extension is needed. We do not have the bandwidth here to support multiple adapter boards since the mechanics of the FPGA boards continues to change.

    SAMTEC has various FMC extension cables that should be able to work with our adapters.

    -Kang

  • 0 in reply to Kang Hsia
    Prodigy 20 points
    thanks Kang,

    by the way do you have any info (previous experience) about compatibility of these DAC series with the 7-series boards? Besides the physical dimensions (e.g. pinout compatibility - AC701 seems ok to me in this case).

    regards,
    J.
  • 0 in reply to Jiri Slovak
    TI__Guru 69364 points
    Hi Jiri,

    The only document I have regarding the V7 platform is the following:
    www.xilinx.com/.../xapp594-parallel-lvds-hs-dac-interface.pdf
    -Kang