[sdiy] THAT2162 vs SSM2164 (was Re: (re-)introduction)

[Tom Wiltshire]

That's a very good page. There are a few important details for me:

1) Form factor. The availability of SSM2164 in a DIP made prototyping on breadboard/stripboard easy. The THAT2162 is pretty small. I soldered one to a homemade adaptor for the breadboard so I could play with it:

http://www.electricdruid.net/images/smd/larger/smdadaptors.jpg

2) THAT2162 is non-inverting. There are a number of occasions where the inverting nature of the 2164 is very helpful. Olivier Gillet's "Four Pole Mission" Xpander-style filter is a good example:

http://mutable-instruments.net/shruthi1/build/4pm

This design wouldn't be half so neat without the inverting SSM2164 stages. In fact, it'd be nearly as messy as the original Xpander filter, which was covered in inverters for exactly this reason.

3) Two control ports. This could be a benefit for the THAT2162. It'd certainly save an inverter on occasion.

The rest of the differences are mostly fairly minor in my view - variations in spec (as you say, THAT is more hifi) and value tweaks. If I ever actually make the jump to SMD, I can see this THAT chip going right up my list.

T.


On 27 Nov 2013, at 14:41, Paul Anderson <wackyvorlon at me.com> wrote:

> While googling, I ran across this outfit:
> 
> http://www.thatcorp.com/THAT_Alternatives_to_SSM2164.shtml
> 
> Looks like the specs are mostly superior to the original, draws a little more current though.
> 
> 
> On Nov 25, 2013, at 5:22 PM, Andre Majorel <aym-htnys at teaser.fr> wrote:
> 
>> On 2013-11-25 22:03 +0100, Roman Sowa wrote:
>> 
>>> too bad the chip got obsoleted so soon.
>>> I still have a few so they will go into some new modules.
>> 
>> FYI, the SSM2164 is second-sourced by Cool audio under the name
>> V2164. Available from http://smallbearelec.com/
>> 
>>> But now I'm heading more into discrete stuff. The transistors,
>>> and dual ones, are now so tiny that it is reasonable to make
>>> small sub modules out of discretes. All potted in a drop of
>>> thermally conductive epoxy or something.
>> 
>> When we said we missed the seventies, we meant the synths, not
>> flared trousers and potted modules. ;-)
>> 
>> -- 
>> André Majorel http://www.teaser.fr/~amajorel/
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