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Importing a capacitor interactive model from manufacturer

KhalidEissa

Hello,

I am trying to import (in spectre) an spice model of a ceramic capacitor manufactured by Samsung EM. The link that includes the model is here :-

http://weblib.samsungsem.com/mlcc/mlcc-ec.do?partNumber=CL05A156MR6NWR

They proved static spice model and interactive spice model.

I had no problem while including the static model.

However, the interactive model which models voltage and temperature coefficients seems to not be an ordinary spice model. They provide HSPICE, LTSPICE, and PSPICE model files and I failed to include any of them.

Any suggestions ?

  • Andrew Beckett

    The models are encrypted, so that means you will not be able to use the HSPICE or LTSPICE models (encrypted models can only be read by simulators from that vendor as otherwise it would be not terribly secure encryption). The good news is that PSPICE is a Cadence product and Spectre has no problem at all reading the PSPICE model. You do however need to include it as a PSPICE model and not as an arbitrary SPICE model.

    So, in ADE, if you use Setup->Simulation Files there's a line at the bottom to reference PSPICE models:

    I then created a simple schematic using a 1K resistor (res) from analogLib and also the cap from analogLib (I set the model name to CL05A156MR6NWR_Precise_Interactive and removed the capacitor value on the instance). I had a simple pulse source (width 40m, period 80m, rise/fall 1u, high voltage set to a variable HIGH).

    I then ran a simple sim where I ran with HIGH=1 and HIGH=4 and you can see it works fine:

    You can even see the nonlinearity of the capacitor from the graph above (the shape is different for the two curves).

    Andrew.

  • KhalidEissa
    in reply to Andrew Beckett

    Sir I appreciate your effort a lot Grinning

    Thank you so much. This worked for me

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