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Amplifiers Simulation - LT Spice

Category: Hardware

Hello, I am interested to simulate my design having operational amplifiers mostly from Analog Devices. I found a software LT Spice. There are some questions in my mind before I start using LT Spice for my simulation. 

1- Is it possible to add 3rd party components from another manufacturer in the schematic and simulate all together ? 

2- How rich is the default library of LT Spice, do I also need to import Analog Devices components, or the library by default has plenty of components ? 

3- What about the license of LT Spice ? or there also exist a free version ? 

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  • Hello ,

    To answer your questions, please refer to the following: 

    1- Is it possible to add 3rd party components from another manufacturer in the schematic and simulate all together?

    YES, it is possible.  You can also check a tutorial on how to add third party models on LTspice Information Center | Analog Devices:
      

    2- How rich is the default library of LTSpice, do I also need to import Analog Devices components, or the library by default has plenty of components? 

    Analog Devices' parts/components are mostly on LTSpice library already. In the case that a particular part/component is not available on the library yet, you can try updating the component's library by clicking Update Components as shown below:

    After updating, you can check if the part/component that you want is available already on the library. If it is still not on the library, you can try navigating to the Component's Product page on analog.com and from there, you can download the Spice Model:

    (On this example, the part used is AD8597. You can download its spice model for it to become available on LTSpice)

    Now, if the model that you want is not available on LTSpice library or on the Component's Product Page at analog.com, it is possible that the part's model is still on development or currently it is being remodeled.

    3- What about the license of LT Spice ? or there also exist a free version?

    LTSpice is free for everyone to download and install. You can download LTSpice from here: LTspice Information Center | Analog Devices

    Hope this helps.

    Regards,
    Paul

  • Thank you for reply. I manage to install LT Spice and added a 3rd party component by autogenerated symbol from SPICE model file *.lib file. 

    How to work with the symbol edit ? I manage to remove the default symbol and tried to draw an OpAmp but aligning the draw line to the grid is a real problem. How to align the draw line to the grid ? It is also possible to change the grid size ? Can you please refer to user guide in PDF please ? 

  • Hello ,

    Can you share a screenshot of what you have done? I don't think that the grid size or spacing on LTSpice can be changed upon checking, but you can zoom in and out to change views and to align the draw lines better.

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