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Old 17th February 2003, 12:04 PM   #21
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Hi all,

I don't have a scope so I can't really measure it, refering to page 8 of CD63 service manual, it seems that the digital filter 8x oversamples the sampling frequency input, hence my guess.

If anyone could confirm this, I'll be pleased to know.

DonJuan
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Old 17th February 2003, 03:47 PM   #22
Pedja is offline Pedja  Serbia
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DonJuan, thanks for the info, this is really interesting.

As SM5872 is delta/sigma DAC and incorporates 8fs oversampling filter it is quite logical that no oversampling is done before it. Also, according to cd63ís Service Manual (page 16), wclk signal is 44.1kHz. Sclk (bck) looks alike 48 x wclk, i.e. ~2.1MHz (actually diagram shows 10-20% less freq than it should be, but it was most likely problem with printing).

Pedja

(14 is wclk, 13 is sclk)
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Old 17th February 2003, 11:13 PM   #23
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Hi Pedja,

Thanks for digging out more info.

Guess the possibilities are endless! Could easily fit in a board that has TDA1541 and a tube gain stage and you now have 2 DACs in a player!

Have fun!

DonJuan
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Old 19th February 2003, 09:09 PM   #24
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The format used by the TDA1543A requires 48 SCLK cycles per L/R frame. For 2 examples see the datasheets for the Sony CXD2551 digital filter and the TDA1305 dac.

ray.
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Old 19th February 2003, 10:59 PM   #25
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Hi Ray,

Do you have the datasheet of the Sony CXD2551 digital filter ?
I searched for it on the web but did not find it. And do you know something about it's quality ?

Regards,

Jean-Paul
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Old 19th February 2003, 11:58 PM   #26
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Partminer.com have the datasheet for the CXD2551. As to its quality I cannot comment as I have not knowingly listened to it. If its age is any guide, the fact that it is a contemporary of the TDA1543A would place it somewhere in mid 80's to early 90's bracket.

ray.
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Old 20th February 2003, 06:01 AM   #27
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Thanks for the information but I am cautious with registration on websites. I have a full mailbox every morning
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Old 20th February 2003, 01:47 PM   #28
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Default TDA1543 DAC circuit.

Can anyone post a complete working circuit diagram of a DAC using the 1543 or 1543A ? Preferably with some comments about its sound.
Thanks,
Cheers.
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Old 20th February 2003, 02:32 PM   #29
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Hi,
Just look here. Click on schematic of the DAC.
http://home.student.utwente.nl/f.s.b...dio/nonoz.html
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Old 20th February 2003, 03:12 PM   #30
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Default Thanks.

Thanks Elso. You are a saviour. I was dying to see an actual implementation. I am arranging to get some chips from Tone.
Thanks.
I can compare it against the TDA1541 and the PCM 63 when I get the boards done. Should be very intereszting.
the TDA 1541 is working now but the PCM63 is being set up.
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