[sdiy] Appearance of many SSM2300 chips

[Dylan Distasio]

Hi all-

I'm new to the list and new to diy synth design, and am trying to soak
up as much as possible.  I realize this is a very beginner question
for most of you on the list, but if someone has a few minutes, could
you please explain the typical applications of Digital to Analog
Converters / sample and hold multiplexers in the synth world.  I saw
in the datasheet of the original that these can be used as compressors
or expanders (I assume of dynamic range), but was hoping to get some
real world examples of how these are used in a design.

Hope it's ok to ask questions this basic on the list.  Thanks!



On Sat, May 28, 2011 at 7:13 PM, Tom Wiltshire <tom at electricdruid.net> wrote:
> Hi all,
>
> Has anyone else noticed the sudden appearance on eBay of loads of SSM2300 (sample and hold multiplexer) chips?
>
> Periodically I check eBay to see if anyone has anything interesting, and I'm sure that last time I looked there weren't the same loads of SSM2300s that I see this time. Has someone found a secret stash of thousands and suddenly started dumping them or something?
>
> Secondly, is such a chip actually useful any more? It seems to me that it probably isn't. Using a single DAC with multiplexers is a bit redundant in this age of many multichannel DACs, and this particular multiplexer doesn't seem to have sufficient accuracy to make you have second thoughts ("High accuracy: 8-bits absolute, 12 bit linearity" they say in the datasheet).
>
> T.
>
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