C
Chris
Guest
On 06/26/19 15:10, John Larkin wrote:
I tend to be suspicious of limited info in data sheets. Does that mean
they haven't tested the part properly, or are they trying to hide
something within the parameters ?. Good companies like the old nat
semi, texas and analog device had pages of data, everything you could
need and more. Suspect a greater spread of parameters now, with so
much made in the far east and pricing pressure...
Chris
On Wed, 26 Jun 2019 09:35:14 +0200, Gerhard Hoffmann<dk4xp@arcor.de
wrote:
Am 25.06.19 um 21:26 schrieb John Miles, KE5FX:
I'd be nervous about using this part without trying it out in person.
I'm sure it's fine, but if one of the ADI/LTC clock parts did something
similar, I'd choose it because of the data sheet alone.
Have you seen the case I opened on ADI E2E wrt the LTC6757 (???) sine to
square converter? An open output with some cm of stripline features
funny oscillations. OK, they die out and an open output is not badly
needed, but that does not build confidence. Looks like sth. is going
metastable.
Silently ignored.
cheers, Gerhard
No, I missed that somehow.
That's not a super fast comparator... 2.9 ns. Even the rise/fall are
over 1 ns. But it wouldn't take much in the way of bouncies to make a
comparator oscillate.
Source termination is good, to cut the rise/fall current spikes in
half, or more.
I suspect that it's hard to keep good support engineers. Being a FAE
is like having five job interviews a day. It's a great start for a
recent grad, to see what's out there. Good FAEs seldom last; they get
hired away.
The semi people also do everything possible to keep the rabble from
disturbing the chip designers. I guess that I'd get real support if I
bought 7 million chips a month.
But really, it would be a net benefit to everyone to publish good data
sheets.
Sonebody could make a nice career being a free-lance data sheet
editor.
I tend to be suspicious of limited info in data sheets. Does that mean
they haven't tested the part properly, or are they trying to hide
something within the parameters ?. Good companies like the old nat
semi, texas and analog device had pages of data, everything you could
need and more. Suspect a greater spread of parameters now, with so
much made in the far east and pricing pressure...
Chris