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Adding new components to LTSPICE

add models and subcircuits from other sources

  1. May 13, 2014 #1
    Harald Kapp

    Harald Kapp Moderator Moderator

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    Harald Kapp submitted a new resource:

    Adding new components to LTSPICE - add models and subcircuits from other sources

    Read more about this resource...
     
  2. Sep 23, 2014 #2
    Supercap2F

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    Hello Harald!

    I was having some trouble figuring out how to add components to LTspice. Do you mind if I ask here, or would you like me to start a new tread?

    Thanks for your time!!! :)
    Dan
     
  3. Sep 23, 2014 #3
    Harald Kapp

    Harald Kapp Moderator Moderator

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    Hello Dan,
    it's o.k. here, you may not be the only one having trouble and what we find out may help others, too.
     
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  4. Sep 23, 2014 #4
    Supercap2F

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    OK, thanks Harald! :)

    Now I'm trying to add a LM2901 and a LM2902 to it (op-amps). I found a Pspice model for the LM2901 here and the LM2902 here. Will Pspice models work with LTspice? Or do I need something else?

    Thanks again!! :)
    Dan
     
  5. Sep 23, 2014 #5
    Harald Kapp

    Harald Kapp Moderator Moderator

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    At a first glance these models look like standard SPICE models. I'm not aware of any PSPICE specialties. These are subcircuits, so you need to use the "Adding a new component (subcircuit) to the LTSPICE library (example: SIOV varistor)" part of my ressource. Give it a try. Any feedback is welcome.
     
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  6. Sep 24, 2014 #6
    Harald Kapp

    Harald Kapp Moderator Moderator

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    I had some spare moments and could use the supplied SPICE models in LTSPICE without problem.
    Note that these comparators have an open drain output. You will need a pull-up resistor to the positive supply for operation.
     
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  7. Sep 24, 2014 #7
    Supercap2F

    Supercap2F

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    Hey Harald!

    OK, cool! I just hope I can do it too. :)

    OK, no probs.

    Just so you know I am 100% new to this LTspice stuff... So if you don't mind, I'm going to need you to walk me through each step. But I will try to do as much as I can myself, to safe you some time.:)

    OK, I have got that with the Pspice file right?

    What do you mean by library? Do I need something more then just the Pspice file?

    Thanks for helping me figure this out! I'm really thankful.:)
    Dan
     
  8. Sep 25, 2014 #8
    Harald Kapp

    Harald Kapp Moderator Moderator

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    The files you linked are plain SPICE files, not PSPICE specific. They work fine for me.

    A library is nothing more than a collection of SPICE models (or subcircuits) in one single file. SInce the links point to files with just one model within, this file is a "library" with just one element.
     
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  9. Sep 25, 2014 #9
    Supercap2F

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    Hey Harald!

    OK, I will just start calling them SPICE files then. :)

    Ohhhh OK, I think I get it now.

    One last thing before I move on: when I downloaded the SPICE model from ST semi it saved itself as a .txt file on my computer. Can I use a .txt file for the model in LTspice, or do I need to convert it to something else?

    Thanks again!! :)
    Dan
     
  10. Sep 26, 2014 #10
    Harald Kapp

    Harald Kapp Moderator Moderator

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    .txt is fine - as it is plain text.
    If you like and find it useful, you can rename it to .lib (for example).

    By the way: Did you know that by opening a SPICE source file (.txt or .lib, it doesn't matter) in LTSPICE, you get the bonus of a little bit of syntax highlioghting?
     
    FuZZ1L0G1C and Supercap2F like this.
  11. Oct 4, 2014 #11
    Supercap2F

    Supercap2F

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    Well after reading your resource a couple more times and doing some googling, I was able to get the models working very good in LTspice. :)

    Thanks Harald! You really helped me out a lot. :)
    Dan
     
  12. Oct 4, 2014 #12
    Harald Kapp

    Harald Kapp Moderator Moderator

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    Good to hear :)
     
  13. Oct 28, 2015 #13
    Gryd3

    Gryd3

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    Keep this up and your going to get yourself banned on any forum you visit.
    You not offering anything to the original poster. Your simply spamming a video
     
  14. Dec 10, 2017 #14
    FuZZ1L0G1C

    FuZZ1L0G1C

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    Thanks for sharing this invaluable resource, Harald.
    As a new user of LT-Spice XVII and Diptrace, I was about to start flooding the forum with questions. Now I can first browse the resource to raise my "CAD IQ" a bit.
    I see exciting potential for future simulation / design once more literate.... :)
    Clive.
     
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