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AD8332 VGA Spice Model Gain Problem

Question asked by KevinC on Jun 13, 2012
Latest reply on Jun 20, 2012 by PaulvdM

Hello,

 

I am working with the AD8332 VGA spice model from Analog's website.  I know it says that all of the models are "AS-IS", but I am hoping to get someone smart with spice models to help me out.  It appears that the model does not correctly model the behavior of the gain control or more specifically it appears to be stuck a max gain (gain pin = 1VDC) no matter what is applied.  It is also possible I have some sort of import issue with LT Spice.  Could someone confirm or deny my suspicion?  I would love to be wrong and am only a spice novice.  I have attached a copy of my spice model and a screen shot of my schematic.

AD8332_Snapshot.jpg

Thanks,

 

Kevin

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