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help with opa320 on multisim

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robse

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Hello,

I'm exploring inverting and non inverting op amp circuits

Following a book of mine, I had success with the following circuit using an lmc6001.
However, using an opa320 for example, I can't get any amplified signal out of it

As a function generator I'm using 1Khz with 100mVp

Can someone explain what's going wrong ? How to obtain 10 times the voltage of the input ?

I can't even get it working without capacitors, and setting them to initial 2.5v didn't change anything.
In this example, function generator is set at 10kHz 100mVp amplitude 0 offset.
Here is what I get on the oscilloscope. Channel A is input RED, Channel B is output GREEN

original.pngoriginal2.png
 

crutschow

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Don't offhand see any reason for it not to work.
What is the polarity of those .ic commands?
Try simulating for at least 500ms to see if anything changes.
 

robse

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I ended up with the conclusion that the opa320 spice model is wrong.

In the latest release I see "* Version 3.0 : Correct for single-supply operation", but it doesn't work anyway
 

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