AD49xx Differential Amplifier Models in LTSPICE

When are all of the ADA49xx differential amplifier models going to be added to the LTSPICE library that comes included with the package?  All I have in my library are LT differential amplifiers, and I don't want to waste time creating new library models myself.  These parts have been around for a long time, and they should already be in the library that comes with a LTSPICE download.


  • No answer in a week?  Why does EZ exist?  To say that it does in order to compete with E2E?  Why offer LTSPICE with most, if not all LT parts in the library, and many ADI parts missing?  I guess LT was more on the ball when it was an independent company, and is now having its sterling reputation soiled by being owned by ADI.  Too bad.

  • 0
    •  Analog Employees 
    on Jul 3, 2020 4:49 AM in reply to 57Custom


    Sorry for the late response. To answer your question, we are still in the process of re-qualifying our spice models to fully optimize LTSpice.

    For the meantime, ADA49xx differential amplifiers are available for download in the product page of the specific part for ex. ADA4940. It would work automatically on LTSpice by adding it as a third party model. To do that, open the downloaded .cir file in LTspice ex. ADA4940.cir. Right click on the line with ".subckt" and create symbol. Add the auto-generated symbol of ADA4940 to your test circuit in LTSpice. Auto-generated symbols are located in the Auto-generated folder in your LTSpice library.

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    •  Analog Employees 
    on Jul 21, 2020 1:51 PM in reply to 57Custom


    Thank you for reaching out. Your question was posted on a Friday during our company shutdown period (9 days) which resulted in a delayed response.  replied to you during his vacation time.

    It is my understanding that your question has been answered offline by one of our engineers. Please confirm this is the case so I may close out this question.