[sdiy] SSM2164 last time buys

[Oscar Salas]

Hi David, 

Yes the current source solution suggested by Steve works.

I used the LM334 (10mA) because it is what I had at hand but it would be better something like 15mA or 20mA.
Yes I connected the (+) to the positive rail, and (-) to the pin 16 of the 2164. And a 7Ω resistor from (-) to the centre leg(r)
Yes I burnt several chips hehe. 

> It seems that a simple resistor would be perfectly adequate
> in this
> application, since the 2164 has internal current sources
> being driven from
> the positive rail, according to the schematic in Figure 23
> of the datasheet.

It would be great. 

--- On Wed, 3/2/11, David G. Dixon <dixon at interchange.ubc.ca> wrote:

> From: David G. Dixon <dixon at interchange.ubc.ca>
> Subject: RE: [sdiy] SSM2164 last time buys
> To: "'Oscar Salas'" <osaiber at yahoo.es>, synth-diy at dropmix.xs4all.nl, steve at bendentech.co.uk
> Date: Wednesday, March 2, 2011, 3:34 AM
> > This works!, I just breadboard
> it with a lmm334 that I had. The device
> > provides 10mA. Will be more adequate something as 20mA
> but for the tests
> > but was OK.
> ...<snip>
> 
> This is excellent, Oscar!  (How many expensive SSM2164
> chips have you
> sacrificed for these experiments?  We should take up a
> collection!)
> 
> So, am I correct in assuming that you put the LM334 current
> source inbetween
> the 2164 and the positive supply, but connected the
> negative supply and
> ground pins normally?
> 
> It seems that a simple resistor would be perfectly adequate
> in this
> application, since the 2164 has internal current sources
> being driven from
> the positive rail, according to the schematic in Figure 23
> of the datasheet.
> 
>