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Noise sound and itching
Posted: Fri May 27, 2016 3:50 am
by kevo1tinh
I use standard SCHEMATIC from datasheet. Sound is noise and itching. I change R,C at IN, OUT but no result. Using internal and external program. I send mail this sound (
support@spinsemi.com). how to solve it.
Posted: Fri May 27, 2016 10:01 am
by frank
Support has not received any email with a sound file, it may have been too big, please post it at a site we can access it like dropbox.
Pictures of your PCB and details on how it is connected would help.
Posted: Fri May 27, 2016 9:34 pm
by kevo1tinh
Posted: Sat May 28, 2016 11:29 am
by frank
Again we did not receive the sound file, please post it at some place like dropbox and send us a link.
Looking at the pictures you do not have a good ground plane, a number of separated ground areas, lots of wires from the board, etc. We recommend at least a 2 layer board with a nice solid ground plane on bottom and all the routing on top, short wires for off board components and clean power supply.
Posted: Mon May 30, 2016 1:17 am
by kevo1tinh
Posted: Mon May 30, 2016 9:27 am
by frank
Which program is that? Does it happen with a lower signal level? Does the clip LED come on?
Posted: Mon May 30, 2016 10:15 pm
by dientulke
it's fake chip. try buy new ic from UK. perfect.