Re: Problems with SPICE models from vendors

From: Robert Baer (robertbaer_at_earthlink.net)
Date: 03/25/05 

Date: Fri, 25 Mar 2005 22:40:53 GMT

Jim Thompson wrote:

> On Fri, 25 Mar 2005 09:26:21 GMT, Robert Baer
> <robertbaer@earthlink.net> wrote:
>
>
>> The LM324 model from TI works fine,but the one from National
>>Semiconductor is junk.
>> I tried numerous Analog Devices models for various rail-to-rail
>>opamps, and found that almost all i tried gave me the same kind of
>>cryptic square root error.
>> Those tried: AD8605, AD531, AD541, AD8552, and the AD8571; the only
>>one tried that did work was for the AD8614.
>> Now i would dearly like to have a set of models that were known to
>>work (and more or less correctly), but i need to get a working AD8605 model.
>> The sets i have came from the manufacturer created in the latter of
>>1992, and thus are not quite up-to-date.
>> However, the model for the AD8605 was downloaded via the web just
>>yesterday - implying the problem is not fixed.
>>
>> Can anyone help?
>
>
> Problem noted, and forwarded to the appropriate device-modeling
> manager at Analog Devices.
>
> I, personally, have experienced some problems with ADI models.
> Reported same, and was told, "They work just fine here."
>
> So don't hold your breath.
>
> BTW, Sennewald is wrong when he says, "...generated by stupid programs
> or "roboters" and not by engineers."
>
> They ARE generated by engineers, or should I say it as "engineers"
> ?:-)
>
> ...Jim Thompson
   I appreciate that you passed on the comments.
   Please see my slightly earlier response, showing problems with the
AD8614 (high input currents and high Vos).

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