[sdiy] AD7523 difference to AD7524

[Roy J. Tellason]

On Wednesday 02 January 2008 14:34, Eric Brombaugh wrote:
> Roy J. Tellason wrote:
> > On Wednesday 02 January 2008 10:27, Eric Brombaugh wrote:
> >> Why not just go directly to the Analog Devices website for datasheets of
> >> their parts?
> >>
> >> http://www.analog.com/UploadedFiles/Obsolete_Data_Sheets/586807146AD7523
> >>.pd f
> >
> > Works sometimes,  but for older ("obsolete" or "unsupported") parts
> > sometimes that's not an option.
>
> True enough. Depends on the Mfg, and ADI (among others) is pretty good
> about keeping old stuff online. Don't you hate it when a company doesn't
> just discontinue a part, but almost disavows it ever existed? If there's
> a reason for that beyond plain cheap/lazy I can't think of it.
>
> > http://www.classiccmp.org/rtellason/parts-index.html
> >
> > ...as hassle-free as I can make it,  and being added to continually,  as
> > I find the time.
>
> Nice. Looks like a _lot_ of work.

Several years worth now.  :-)

I started it as a way of just organizing the stuff I had on hand here.  And 
also use a whole "local HTML tree" to do that with a whole lot of other stuff 
as well -- saved web pages,  app notes,  PDFs,  whatever.  I'm also still 
working my way through a heck of a backlog of stuff that I've saved and not 
gotten to plugging in there yet,  cleaning things up a bit,  eliminating some 
dupes,  etc.  Just yesterday I realized I had downloaded "4012.pdf"  (Yeah,  
_that_ 4012,  the VCF module from ARP :-) more than once,  for example.

> I guess the ideal case would be "The Ultracomplete Maxi-Megalon Library
> of Every Datasheet Ever Conceived" (to borrow from Douglas Adams, RIP).
> This would have the following characteristics:
>
> * Free

Check.

> * Wide Bandwidth

The parts pages are hosted by a guy who owns an ISP.  I guess I can't get much 
better than that?

> * Contains _everything_

Working on it.  :-)

> * Google (and all other web indexes) would list it first in their results.

They seem to do me pretty well.  If you look at the bottom of any of those 
pages there's a hit count / sitemeter icon,  clicking on that will take you 
to _their_ site where you can view various stats about my pages (which I 
chose to allow),  including referrer -- google is by far the most common.

> * All PDF (or high-res scans of old printed sheets)

So far, though I've got a few things that for some odd reason were only saved 
in jpeg.

> * Sort by function, Mfg, part number, package, dates of production, etc

That's a database,  and I'm not quite ready to go there yet,  though a bit of 
work has been done playing around with the idea.

> * Includes cross-references
> * (reaching) Includes private/custom/house number cross refs.

I think those two things could be combined.  Heck,  I wish I *had* more info 
on some of those private/custom/house numbers,  I do have a bit of it,  but 
keying all that in is gonna be a chore.

And then,  some time soon I'm going to have to focus all of my attention on 
making a living,  so some other things can either maintain or move forward.  
Which tends to eat up a lot of time.  :-)

> I suppose that a few sites out there come close to this, but I've found
> that they all have holes in 'em and I have to be prepared to try a few
> different ones to ensure success. That's why the actual Mfg is always my
> first stop.

Well,  a guy did a bunch of that for me and sent me 3 DVDs full of stuff (with 
a lot of dupes as he doesn't appear to have realized that there are multiple 
numbers in some sheets so I have multiple copies of them in there),  and I 
started working my way through the first one until the drive died on me,  and 
I can't afford to replace it.  Was a bit of an oddball,  too,  external,  USB 
interfaced,  though ATA inside the box,  and CD-RW as well as DVD-R,  but 
_shorter_ (front-to-back) than a standard drive is for some odd reason,  I've 
never seen that before.  Could use a replacement,  if somebody has an extra 
one...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin