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How to convert IBIS Models into PSpice Model ?

DesignTech

I/O Buffer Information Specification known as IBIS is used to behaviorally represent the Input, Output, and I/O buffers of digital ICs. These models characterize a buffer using a collection of DC data (current vs. voltage), as well as transient data (voltage vs. time) in form of I-V and V-t tables.

PSpice users perform SPICE simulation on the complete design, which includes digital ICs whose pin buffer models are available in the IBIS format. To achieve this, the IBIS model needs to be converted to the PSpice model. The translated PSpice model is a sub-circuit that converts the V-I and V-t data from IBIS file to PSpice compatible tables.

The resulting PSpice subcircuit does not have any power pins because they are already included in the subcircuit.

To translate an IBIS model using Model Editor:

  1. Open Model Editor.
  2. Choose Model – IBIS Translator. The IBIS translator appears.

In the IBIS/DML File field, specify a .ibs or .dml file to be translated in the IBIS translator dialog box. You can use the Browse button to select the file.
A dialog box appears for IBIS to DML generation settings.

Select:

  • Always regenerate DML to regenerate DML files. IBIS files are first converted to their equivalent dml files, and the dml files are then read. If Always regenerate DML is not selected, IBIS to DML conversion is not done if a dml file with the same name is already available and the dml is more recent that the IBIS file.
  • Make model names unique to create models with unique names by prepending the file name to the model name.

Team DesignTech

Cadence Design Systems

  • Andrew Sean
    0

    I have a similar problem that the software always flashback at the step "make model names unique" when coverted IBIS model to pspice model. And I can't find generated .lib file.

    Can you help me with that? I really appreciate it if answer helps!

  • AyushD
    0 in reply to Andrew Sean

    The .lib file will be generated at the location of the ibis (.ibs) file itself.

    If lib is not generated, please check the .log file generated at the same location for any error messages or info.

  • DaanIE
    0

    I'm new to PSpice for TI. I can't seem to find the 'Model editor' nor the 'IBIS to PSice convertor'. In a video I saw it under the File tab, but on my pc it doesn't show up.

    I am trying to add any LVDS receiver and LVDS driver into my design to do a few simulations. When I search for a LVDS component in the 'PSpice part search', I only get 4 results (4 comparators with lvds output) which are not really what I need. When choosing for PSpice for TI, I was expecting to find almost all Texas Instruments components in this software product. Was this a wrong assumption from me? I did update the libraries but no more results showed up.

    Instead I wanted to try to add the Texas Instruments component DSLVDS1001, an LVDS driver. On this website (www.ti.com/.../DSLVDS1001) I downloaded the .ibs file for this component, but I can't seem to find a way to add the component to PSpice. The only way I found up till now is with the 'Generate part' button under the 'Tools' tab. I can select the .ibs file I downloaded on the Texas Instruments website as my 'Netlist/source file', but I cannot select anything for the 'Destination part Library', so I cannot go further then this.

    Any help or suggestions would be greatly appreciated! I probably missed something obvious somewhere, but for now I can't seem to figure it out.

    Thank you in advance!

  • TechiEE12
    0 in reply to DaanIE

    Model Editor is not a part of PSpiceTI. If you wish to use Model Editor, try installing commercial version of PSpice.

    I tried searching DSLVDS1001 in PSpiceTI library but couldn't find either. So I don't think it is supplied with TI library.

    If you still feel few other models are missing, try reinstalling the PSpiceTI Models and Libraries and make sure to restart once done.

    Tools > Generate Part only allows to use only following files as Netlist/ source file, I don't see ibis file. May be due to this you are facing the issue while locating 'Destination part Library'.

  • AyushD
    0 in reply to DaanIE

    If you need any particular TI part and it is not in the supplied library with PSpice-for-TI, you can check on TI website if it is available to download, you can then configure it in tool. Or if you want it to be added in the tool supplied libraries, you can try putting this request with TI

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