AD8021 spice model issues

Hi

I downloaded AD8021 Spice model from Analog website and simulated the OpAmp alone and it worked fine. When I put AD8021 model on my Power Amplifier circuit , it crashes and I am not able to see the simulation. I have changed different parameters in LTSpice and I have not being able to get the AD8021 working, however I used to have AD8033 instead and my Power Amplifier circuit was working fine. Do you know why this is happening? Could it  be an issue with the AD8021 model?

Thank you for your help,

Berny

  • 0
    •  Analog Employees 
    on Dec 3, 2015 5:36 PM over 5 years ago

    Hi Berny,

    Could you share your schematic, please? I will try to replicate it and isolate the problem. Also, what are your application requirements? Would you mind sharing it with us? Thank you.

    Regards,

    Jino

  • Hi Jino,

    I replied back to your email but I have received notifications that my server was delayed sending your message so I am assuming you haven't read my response.

    Here is the schematic and all the symbols and libraries that you need. If there is anything missing let me know.  We are simulating a 50W Power Amplifier (50WLPA_99.asc) and the OpAmp in the front end used to be the AD8033 but we were getting  odd harmonic distortions in the bench and we decided to simulate it replacing the AD8033 with AD8021. The schematic to simulate AD8021 alone is AD8021-test-jig.asc which I can simulate fine and it shows good amplification for the AD8021; when I go to the 50W LPA schematic and put the AD8021 is when my simulation crashes. Please let me know what you can find.

    https://www.dropbox.com/s/v7tf33grbh0gc7z/LTSpice.7z?dl=0

    Thank you for your help!

    Berny

  • Hi Jino,

    I replied back to your email but I have received notifications that my server was delayed sending your message so I am assuming you haven't read my response.

    Here is the schematic and all the symbols and libraries that you need. If there is anything missing let me know.  We are simulating a 50W Power Amplifier (50WLPA_99.asc) and the OpAmp in the front end used to be the AD8033 but we were getting  odd harmonic distortions in the bench and we decided to simulate it replacing the AD8033 with AD8021. The schematic to simulate AD8021 alone is AD8021-test-jig.asc which I can simulate fine and it shows good amplification for the AD8021; when I go to the 50W LPA schematic and put the AD8021 is when my simulation crashes. Please let me know what you can find.

    https://www.dropbox.com/s/v7tf33grbh0gc7z/LTSpice.7z?dl=0

    Thank you for your help!

    Berny

  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:17 PM over 2 years ago
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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    EZ Admin