decoupling PCM1716

Smiffy · 3rd February 2004, 06:25 PM

Decoupling digital supply
Oscons or Black Gates?
decoupling analogue supply for internal op amps
Black gates?
Any thoughts/preferences
Ta for any inf
Smiffy

hjelm · 4th February 2004, 12:21 PM

Sorry if i intrude in the thread but any recommendations for the LPF filter caps on pins 11 and 18 on the pcm 1716. It is apparently equally important as the decoupling caps.

ljordan · 4th February 2004, 01:58 PM

What exactly are these pins 11 and 18? Labeled common of analog output amp(L and R).

Lewis

Smiffy · 4th February 2004, 04:37 PM

Can't find any reference to pins 11 and 18 in the datasheet.Will ask BB what they do.

http://www.analog.com/Analog_Root/pr...8099%2C00.html

found the above op amp from AD,Looks promising but non conventional pin outs

Smiffy

Smiffy · 4th February 2004, 07:02 PM

PS
No intrusion at all Hjelm.Glad you brought it up.Was going to leave those caps alone.Maybe not now you mentioned it.Have e mailed BB/Ti
Smiffy

hjelm · 5th February 2004, 06:45 PM

Maybe i was wrong in its function but it is apparently important see Kuei's statement a bit down.Use OS-CON in Vcc? .

Smiffy · 6th February 2004, 01:24 PM

Thanks for the link.will give it a good read
This was the reply I got from Ti/BB today

EXRL,EXTR, these two pins are noise de-coupling function of
internal analog 0.5Vcc bias.
This 0.5Vcc bias is common level of internal analog section as
channel individual.
Noise de-coupling capacitor ( 1uF to 10uF ) should be connected
as typical application.

Smiffy

3rd February 2004, 06:25 PM	#1
Smiffy diyAudio Member Join Date: Aug 2002 Location: UK	decoupling PCM1716 Decoupling digital supply Oscons or Black Gates? decoupling analogue supply for internal op amps Black gates? Any thoughts/preferences Ta for any inf Smiffy

4th February 2004, 12:21 PM	#2
hjelm diyAudio Member Join Date: Nov 2003 Location: Västerås	Sorry if i intrude in the thread but any recommendations for the LPF filter caps on pins 11 and 18 on the pcm 1716. It is apparently equally important as the decoupling caps. __________________ Hjelm

5th February 2004, 06:45 PM	#6
hjelm diyAudio Member Join Date: Nov 2003 Location: Västerås	Maybe i was wrong in its function but it is apparently important see Kuei's statement a bit down.Use OS-CON in Vcc? . __________________ Hjelm

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4th February 2004, 01:58 PM	#3
ljordan diyAudio Member Join Date: Mar 2003 Location: L A	What exactly are these pins 11 and 18? Labeled common of analog output amp(L and R). Lewis

4th February 2004, 04:37 PM	#4
Smiffy diyAudio Member Join Date: Aug 2002 Location: UK	Can't find any reference to pins 11 and 18 in the datasheet.Will ask BB what they do. http://www.analog.com/Analog_Root/pr...8099%2C00.html found the above op amp from AD,Looks promising but non conventional pin outs Smiffy

4th February 2004, 07:02 PM	#5
Smiffy diyAudio Member Join Date: Aug 2002 Location: UK	PS No intrusion at all Hjelm.Glad you brought it up.Was going to leave those caps alone.Maybe not now you mentioned it.Have e mailed BB/Ti Smiffy

6th February 2004, 01:24 PM	#7
Smiffy diyAudio Member Join Date: Aug 2002 Location: UK	Thanks for the link.will give it a good read This was the reply I got from Ti/BB today EXRL,EXTR, these two pins are noise de-coupling function of internal analog 0.5Vcc bias. This 0.5Vcc bias is common level of internal analog section as channel individual. Noise de-coupling capacitor ( 1uF to 10uF ) should be connected as typical application. Smiffy

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