Author Topic: SCPA designation  (Read 1174 times)

mark123

SCPA designation
« on: August 09, 2016, 07:56:09 AM »
There are a number of chips that carry the SCPA designation at the end such as ICL7660SCPA.  What does it tell me?  I was told that using one as a charge pump in an audio situation that I'd need the SCPA or I'd risk getting a high pitched whine at the output.  I never questioned it and always went with the SCPA version. 

Any idea what it means?

bluebunny

Re: SCPA designation
« Reply #1 on: August 09, 2016, 08:02:10 AM »
In this particular case, it's the "S" that tells you the chip is capable of being wired up so that you avoid the whine (short pins 1 and 8).  The other letters will tell you about packaging and other specs, none of which is whine-related and none of which will kill anyone.  So not important.   ;)
Ohm's Law - much like Coles Law, but with less cabbage...

mark123

Re: SCPA designation
« Reply #2 on: August 10, 2016, 07:30:11 AM »
Thanks for the info. :)

Best regards.

bluebunny

Re: SCPA designation
« Reply #3 on: August 10, 2016, 09:33:38 AM »
You're welcome.  (And welcome, too!)  BTW, you might want to post in the main "Building your own stompbox" forum.  There's very little footfall on this project sub-board.   :)
Ohm's Law - much like Coles Law, but with less cabbage...

mark123

Re: SCPA designation
« Reply #4 on: August 10, 2016, 03:35:29 PM »
Ah, sorry for the noob mistake.  I'll figure out where to post one day. :)

Thanks so much for the assistance.