[sdiy] SSM2164 last time buys

[Olivier Gillet]

In the "potted module" category, has anyone seen this?
http://www.schippmann-music.com/downloads/VCF2_Datasheet_ENG.pdf

On Fri, Feb 25, 2011 at 1:23 PM, Paul Maddox
<paul.Maddox.mail-list at synth.net> wrote:
> 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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>> -- >> _______________________________________________
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>> -- >>
>> -- > _______________________________________________
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>> --
>> --
>> --
>> -- --
>> -- Joe Grisso
>> -- Detachment 3, Ltd.
>> -- _______________________________________________
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>>
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