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IBIS model simulation

niranjan madha
I am designing a Data acquisition system with a Texas instruments ADC, Inamps and a ST micro electronics micro controller. I am getting spice models for my inamps, differential amplifiers etc. so that I could do SPICE simulation.

I wish to see the output of my ADC if I am providing an input signal with my simulated amplifiers and filters. I am getting an IBIS model of the ADC. Is there any tool software so that, I can import these spice models and connect with this IBIS model similar to what we do in spice softwares and get an an output, so that I could do some FFT, transient analysis etc.?

I am new to these IBIS models. I am not sure what it is used for. When I read some introductory papers, I understood it is also a behavior model. Could we use it in the same way as SPICE transistor based models and get the same kind of results using Virtuso spectre or any other cadence product?
  • Andrew Beckett

    I'm not sure what environment you're working in (Orcad or Virtuoso?) - but spectre can use IBIS models using the ibis_buffer component - which is also available in analogLib. See the documentation for more details (search in cdnshelp for ibis_buffer)

    Regards,

    Andrew.

  • niranjan madha

    Hi andrew,

     

    Thankyou for the quick reply.

     

    Actually I am not using any spice tool from cadence currently. I am looking for a tool which is perfect for simulation of mixed signal systems. I have an Orcad 16.0 which have a license for a very few features. So, I want to update the license with more options. I am not sure about the tool I want to purchase just a orcad spectre license will help or have to go for Virtuso? 

  • Andrew Beckett

    Given that you're using discrete components rather than doing IC design, I'd say you probably want Orcad with PSPICE which I believe also supports IBIS models (I'm sure it does, it's just not my product area so I don't know the details).

    I'll move your question into a more appropriate forum.

    Regards,

    Andrew.

  • niranjan madha
    Thank again for the quick reply. The day I am getting the perfect answer would be directly asking quote for it!!!
  • Alok Tripathi

    Yes. One can use PSpice to simulate IBIS model with SPICE devices. You need to import IBIS model using Model Editor (SPICE modeling module of PSpice). This import process generates equivalent SPICE model. PSpice 16.6 release has enhanced support for IBIS devices. Details about this enhancement can be found at

    http://www.cadence.com/products/orcad/pages/whatsnew.aspx

    http://www.ema-eda.com/Products/CadenceOrCAD/OrCAD166/PageID/1/PgrID/2478.aspx#LiveTabsContent2454382-lt

    http://www.flowcad.de/datasheets/Whats-New-in-PSpice-166.pdf    refer page/slide 17

     

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