TL081/TL084 Model that accurately models Power Supply Current ??

Yep :-( I may have to try and roll my own.

...Jim Thompson

I guess I need to finish refining my model ;-)

I've added a lot of bells and whistles, but not yet the power-supply/load coupling.

...Jim Thompson

Yes, and IIRC wildly optimistic. Not to discourage you, but I looked a couple of years back and didn't find one that was any better than TI's.

Jim,

That vender opamp models don't steer current from the supplies deals with their Boyle model ancestry.

I would recommend using LTspice's Universal Opamp model. It properly steers current from the supplies. You specify Avol, GBW, slew rate, current limit, phase margin, switch saturation voltage(how close the output gets to the rails), offset voltage, equiv. input voltage and current noise densities and corner frequencies for the particular opamp.

LTspice's Universal Opamp model does tend to be better than many of dedicated PSpice-style opamp models that get supplied by vendors based on the Boyle model.

--Mike

Jim Thompson is, and always will be:

If you make new models, can you please post them here?

-- Chaos Master®, posting from somewhere near Porto Alegre, Brazil. "... one either has a s*it, or not. Do you have yours?" ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

To reply remove "DEADTOTHESPAMMER" from address.

Jim,

The documentation on LTspice's Universal Opamp model can be found in the schematic installed as

../examples/Educational/UniversalOpamp.asc

These models were recently updated in response to extensive field testing.

They use a transconductance with a hyperbolic tangent transfer function into the dominate pole to model GBW and slew and also give some onset of slew rate limited distortion as you approach the slew limit. The same symbol can model four different models each with increasing complexity. If you forego the phi margin specification, then level 2 is enough. It does Avol, GBW, slew rate, current limit, switch saturation voltage, offset voltage, equiv. input voltage and current noise densities and corner frequencies with a single internal node -- a technology otherwise unmatched in circuit simulation.

--Mike