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Importing LMV794 Pspicemodels into OrCAD Pspice 16.3

cool_buddy
Prodigy 115 points
Other Parts Discussed in Thread: LMV794

i want to add LMV794 Pspice model into OrCAD Pspice 16.3.when i download from ti website a mod file is downloaded.i dunno how to proceed.i m new to OrCAD. please explain in detail.I need step by step procedure to add that.Thanks in advance....

  • 0
    TI__Mastermind 41310 points

    Cool_buddy,

    Since you are new to Orcad, you probably have not used a .lib file to create a symbol file (.olb). The file that you downloaded (even though it is named a .mod file) is really a .lib file. Simply rename it to LMV794.lib.

    Once it is named .lib, use the Model Editor (found under the Cadence-->AMS Simulator-->Simulator Accessories) to open the .lib file. Use the option Export to Capture part Library... and a generic symbol for the device will be created in the same directory as the .lib file. This will be the .olb file.

    Next, Open your capture tool and create a new project. Set up your project and select the Place-->Part... Navigate to your directory where the .olb and .lib files are stored by clicking on the file icon:

    Once you have found the .olb file and loaded it, it will appear in the part window. Click on it and the part will be ready to be placed in your schematic.

    Before you run your simulation, be sure to add the .lib path to your sim profile, otherwise the device will not be found for simulation:

    Select Library and add the path to your design.

    That should be all you need to do to simulate the device. Of course, you will need to draw the rest of the circuit around the device as well...

    Britt

     

  • 0 in reply to Britt Brooks - Online Design Tools
    Prodigy 115 points

    Thanks Britt...Really ur explanation was gud. I added that file.now if i open LMV794 it is opened as 5 pin package.actually it is 8 pin op amp.Also What s the difference between add the library file to design and add as global? Well thanks a lot and Thanks in advance...

  • 0 in reply to cool_buddy
    TI__Mastermind 41310 points

    Cool_buddy,

    In most subcircuit models for dual devices, only 1 model is created and the user may place two instances of the device in their schematic. Electrically, there is little difference. During layout and routing, however, you will have to note that there is a difference between the electrical schematic and the layout schematic. The 8 pin device has two amps( A and B) in the same package and share the V+ and V- connections.

    The pin assignments are in the top of the .lib file as comments:

    * PINOUT ORDER +IN -IN +V -V OUT
    * PINOUT ORDER    3    4    5   2     1

    If you add to global, the library will be added to EVERY design you make, not just the ones in the current project. Any new projects would automatically have it added.

    Britt

  • 0 in reply to Britt Brooks - Online Design Tools
    Prodigy 115 points

    Thank u sooo much for your reply sir.Thank u...