[sdiy] SSM2164 last time buys

[Joe Grisso]

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.