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Old 29th June 2010, 11:22 PM   #21
toufu is offline toufu  United States
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Where is everyone getting their TDA1541A's from?
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Old 30th June 2010, 03:30 AM   #22
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Quote:
Originally Posted by toufu View Post
Where is everyone getting their TDA1541A's from?
I got my from ebay, item 220557060865
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Old 30th June 2010, 06:57 AM   #23
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Wow, the German Post works well


Quote:
Originally Posted by rtd View Post
Got mine too, thx.
Few question, where does the DGND meet the top groundplane ? and is there any specific reason you consider 1541 ground as analogue one ?

Thx
Hi rtd,

the DGND meets the GP direct at PIN 14.
The only reason for the DC Analog / DC Digital printing is to separate all voltage and GND lines between the TDA1541A
and additional ICs or circuits (S/PDIF- or USB to I2S converter), witch you could connect to this +5V line.


Best regards,
Oliver
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Old 30th June 2010, 08:20 PM   #24
toufu is offline toufu  United States
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Hi Oliver, I got the boards too.. Thanks.

Just a question, we don't use the +25V on the Salas board? Also, we use 2 power supply boards to create +/-15V and +15V?
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Old 30th June 2010, 10:57 PM   #25
rtd is offline rtd  France
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Quote:
Originally Posted by dvb-projekt View Post
Wow, the German Post works well
Hi rtd,

the DGND meets the GP direct at PIN 14.
The only reason for the DC Analog / DC Digital printing is to separate all voltage and GND lines between the TDA1541A
and additional ICs or circuits (S/PDIF- or USB to I2S converter), witch you could connect to this +5V line.


Best regards,
Oliver
Thx... I guess I was not clear enough.
I was talking about DGND for additional IC (you name it DC digital) for which you made separate bottom DGND line. But this separate ground meets the top groundplane. The question is where ?

For the 1541A, i had best results with two separate groundplane tied together under the 1541A , one is considered as analog an the other digital. There are many configuration (see thread in this place), but -15v is refered to the analogue one and -5,+5 to the digital. 100 nF Decoupling is to the analogue ground. Separate PSU is used.

That's why i asked why you apparently consider one solid groundplane (tied at pin 5 and 14) and considered as analogue.
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Old 1st July 2010, 06:42 AM   #26
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Quote:
Originally Posted by toufu View Post
Hi Oliver, I got the boards too.. Thanks.

Just a question, we don't use the +25V on the Salas board? Also, we use 2 power supply boards to create +/-15V and +15V?
Hi toufu,

please look at my post #12. There you could see the power schematic overview and the voltages that are needed.
If your input voltages in the shunt regulatores are a little higher, thats no problem.

Quote:
Originally Posted by rtd View Post
Thx... I guess I was not clear enough.
I was talking about DGND for additional IC (you name it DC digital) for which you made separate bottom DGND line. But this separate ground meets the top groundplane. The question is where ?
Hi rtd,

the DGND for the add. ICs meets the GP direct at the Wago connector GND pin.


Best regards,
Oliver
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Old 2nd July 2010, 06:39 AM   #27
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Got my boards yesterday.


thanks!

Francesco.
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Old 2nd July 2010, 07:16 AM   #28
UV101 is offline UV101  England
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Boards arrived!!!!

Awesome quality - Thanks
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Old 2nd July 2010, 10:35 AM   #29
Thomo is offline Thomo  United Kingdom
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Board arrived the other day for me too.

Many thanks,

Lee.
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Old 5th July 2010, 07:09 PM   #30
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