[sdiy] SSM2164 last time buys

[Paul Maddox]

David,

  he has indeed, and I have one that I'm working with for a personal
project, however, they're not SMD, they're more like 0.6" wide body 16
Pin chip sized devices. I couldn't use them for a kit/commercial
product.

Paul


On 25 February 2011 07:58, David <dingebre at 3dphysics.net> wrote:
> George Hearn has done this already. He built a 2040 clone, VCO, ADSR, and a
> VCA already in very small and useable potted packages with surface mount
> chips.
>
> http://sites.google.com/site/hearnmorley/
>
> David
>
> -- -----Original Message-----
> -- From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
> -- bounces at dropmix.xs4all.nl] On Behalf Of Joe Grisso
> -- Sent: Friday, February 25, 2011 12:23 AM
> -- To: Paul Maddox
> -- Cc: SynthDIY
> -- Subject: Re: [sdiy] SSM2164 last time buys
> --
> -- Well, I know it's a sin to mention this in the SDIY forum (heheh), but
> -- I think a SMT discrete VCA could fit into a very tiny space. However,
> -- I don't know whether or not a good quality quad discrete VCA could fit
> -- into the space that a DIP16 would allow. A simple gilbert multiplier
> -- definitely would, but that's quite simple.
> --
> -- Best,
> --
> -- Joe
> --
> -- On Fri, Feb 25, 2011 at 12:18 AM, Paul Maddox
> -- <paul.Maddox.mail-list at synth.net> wrote:
> -- > The problem is, how much PCB space does his VCA take?
> -- > I suspect that using the SSM2164 will give me 4 VCAs in less space
> -- > than one discrete one. Plus the matching between them will be a lot
> -- > tighter.
> -- >
> -- > I full appreciate the reason for discrete parts, but in products that
> -- > you want to make small, or to keep costs down (Complexity/ease of
> -- > setup/PCB size/parts) there's a trade off to be had.
> -- >
> -- > Paul
> -- >
> -- > On 25 February 2011 06:55, David <dingebre at 3dphysics.net> wrote:
> -- >> It's interesting. In my interaction with Nyle in my Synthasystem
> project, I
> -- >> asked Nyle why his circuits were essentially all discrete except for a
> few
> -- >> op amps. His comment was he didn't want to be locked into a specialty
> chip.
> -- >> He wanted to be able to build his circuits 30 years down the road and
> not
> -- >> worry about a chip being obsolete. Here I am 35 years later and
> building his
> -- >> designs with no problem.
> -- >>
> -- >> The one exception is the MC1495 multiplier in his Ring Modulator.
> Although
> -- >> Arcade Game Chips has a stock of 30,000, or so he tells me :)
> -- >>
> -- >> David
> -- >>
> -- >> -- -----Original Message-----
> -- >> -- From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
> -- >> -- bounces at dropmix.xs4all.nl] On Behalf Of megaohm
> -- >> -- Sent: Thursday, February 24, 2011 11:13 PM
> -- >> -- To: Tom Wiltshire
> -- >> -- Cc: synthdiy diy
> -- >> -- Subject: Re: [sdiy] SSM2164 last time buys
> -- >> --
> -- >> -- On Thu, Feb 24, 2011 at 9:04 AM, Tom Wiltshire
> <TOM at electricdruid.net>
> -- >> wrote:
> -- >> -- >
> -- >> -- > Analog Devices have listed SSM2164 as "Still In Production but
> Not
> -- >> Recommended for
> -- >> -- New Designs", and have "last time buy" by the available product
> models
> -- >> (leaded devices
> -- >> -- became obsolete some while ago).
> -- >> -- >
> -- >> --
> -- >> -- That sucks. I was going to start experimenting with that IC more
> -- >> seriously.
> -- >> -- I hadn't before because I assumed it would be obsolete soon. I
> didn't
> -- >> -- think it would be this soon!!!
> -- >> --
> -- >> -- At least there is the 13700 still. With the right circuit I
> actually
> -- >> -- prefer these over any specialty IC for VCA circuits.
> -- >> -- But...it's just a matter of time before these are gone, too.
> -- >> -- Time to go discrete.
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> --
> --
> --
> -- --
> -- Joe Grisso
> -- Detachment 3, Ltd.
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