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OPA2673 Spice File

Markus Karlson
Prodigy 20 points

Other Parts Discussed in Thread: OPA2673, TINA-TI

Hi


im working on a Power Line Transceiver based on the OPA2673. I'm using Agilent ADS Suite to design the Device. First i imported the Spice File into my Projekt. After that i wanted to see if the Model can be simulated without errors and warnings. But my simulation showed me the warnings:

port "0" in design "C:\Users\Workstation \Desktop\ADSProjekte \Transceiver_prj\networks\opa2673_model"
 Grounded port in subcircuit will produce  incorrect simulation  results, unless the corresponding pin  is also grounded.

Warning detected by hpeesofsim during netlist flattening.
    Resistor `X1.X1.r_u3_u3_r4' is shorted.
Warning detected by hpeesofsim during netlist flattening.
    Resistor `X1.X1.r_u3_u3_r1' is shorted.
Warning detected by hpeesofsim during netlist flattening.
    Resistor `X1.X1.r_u2_u3_r4' is shorted.
Warning detected by hpeesofsim during netlist flattening.
    Resistor `X1.X1.r_u2_u3_r1' is shorted.
Warning detected by hpeesofsim in topology check during circuit set up.
    Number of nodes with only one device attached (topology corrected): 3
    Number of nodes with no DC path to ground (topology corrected): 2


I have read something about an biasing problem but i don't have much experience in simulation of that big models. Can some one suggest what i have to make better?

  • 0
    TI__Genius 13935 points

    Hello Markus,

    I think there are some changes to the model required by ADS.  Some of our parts have an ADS model available on the web, but they are mostly RF devices.  I have put in a model request to port the SPICE model into ADS 2009 format.  Is this compatible with your ADS version?  I had to enter a value to get the request moving. 


    In the meantime it may be possible to put in an ideal op amp in ADS for the system modeling.  You can use TINA-TI to model the op amp portion of the circuit. 

    Regards,

    Loren

  • 0 in reply to Loren Siebert 1
    TI__Genius 13935 points

    Hello Markus,

    I need some more detailed information before I can move ahead with the modeling request. Can you use the conversation feature and send me your email address?

    Regards,
    Loren

  • 0 in reply to Loren Siebert 1
    TI__Genius 13935 points

    1830.OPA2673_ADS2009SP1_prj.zip

    Hello Markus,


    See if this model works.  Our modeling group has made the required changes for ADS compatibility.

    Regards,

    Loren

  • 0 in reply to Loren Siebert 1
    Prodigy 20 points

    Hello Loren

    thank you for your help and the modified model. I run your new model but the warnings still continue without any chang. Maybe you can me send more information. I have added my mail adress beloe. Do you know how great would be the error when i create a greater Design and the warnings wouldn't be cleaned?

    Best regards

    Markus

    JoyKarli@gmx.de

  • 0 in reply to Markus Karlson
    TI__Genius 13935 points

    Hello Markus,

    I don't have any ADS experience.  I think it depends on the warnings whether they would impact the overall system. 

    You may want to contact Agilent with some of these questions.

    Loren

  • 0 in reply to Loren Siebert 1
    Expert 1630 points
    Dear Loren and Markus,

    I have the same issue using a standard PSpice simulator. It is related to lines 146, 192, 307 and 353 of the file contained in sbom338.zip downloaded today. Obviously both ends of 50 Ohm resistors are connected to the same node, thus have a short circuit. You can remove the spice warning by commenting out these lines. Nevertheless the model makes trouble before entering steady state, because some nodes inside the OPA2673 model do not converge. This could be related to some missing resisitors ...
    Could someone check the model for correctness?
  • 0 in reply to Sven Probst
    Expert 1630 points

    Hi Loren,

    are there any news about the OPA2673 spice model? At least the file date did not change, thus I assum no. I'm going to use it in a future project, thus I'm wondering, if the converge issue still exists?