Spice problem

The LT1028 datasheet is a travesty. You'd never guess from the noise plot that there's a big noise peak at 300 kHz and another one (I'm told) out around 2 MHz. One of the more egregious bits of specsmanship I've seen--right up there with chopamp datasheets. I ripped them over it once, after discovering that nasty peak experimentally, and was told something along the lines of

"Our marketing department decided that this was really an audio part, so the datasheet has all the data relevant to audio uses. Nobody cares about 300 kHz noise in audio."

The audio noise level rose fairly dramatically at about that point. ;)

'The Hitchhiker's Guide to the Galaxy defines the Marketing Division of the Sirius Cybernetics Corporation as "A bunch of mindless jerks who will be the first against the wall when the revolution comes."'

(Second against the wall will be the HR department, of course.)

Cheers

Phil Hobbs

I did a full delete/reinstall of LT Spice yesterday, and it has three LT1028 versions in the "opamps" library. And one 1128.

I've used LT1028s in NMR gradient drivers, but bandwidth there is usually in the

Funny how IC people leave bugs around forever; they rarely fix things, and often deny the problems. I'm sure there are cases where hundreds of users found the same bug, over many years, at great expense.

I did an "update" two days ago, I'll try again. Thanks for the tip. ...Jim Thompson

Found it. Screwed up the date setting in my search engine :-(

It's virtually 100% behavioral, plus a whole pile of "noiseless" resistors. ...Jim Thompson