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Old 2nd June 2007, 08:49 AM   #21
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The DAC is working properly now. I changed the topology from delaying data to delaying Fsync and the problem is solved.
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Old 2nd June 2007, 09:08 AM   #22
banana is offline banana  Hong Kong
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how do u split Left and right data? By inverting Fsync??
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Old 2nd June 2007, 09:29 AM   #23
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Yes. There is a small delay between two channel.


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how do u split Left and right data? By inverting Fsync??
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Old 2nd June 2007, 01:41 PM   #24
Hartono is offline Hartono  Indonesia
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Looks nice
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Old 3rd June 2007, 03:10 AM   #25
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Thank you, Hartono.

I design the PCB in 3 separate module so it has great flexibility. Receiver, main and analog modules, each has a separate power supply on board. As such the DAC and analog modules can be changed/upgraded easily.

The receiver module includes relocking. It is powered by the very low noise regulator REG104-5 from Burr Brown. The shift registers can be configure easily to be compatible with various data formats.

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Looks nice
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Old 4th June 2007, 06:15 AM   #26
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Dear quantran

Can I buy the PCB and PCM63 chip of this project ?

Thanks a lot !

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Old 4th June 2007, 09:02 AM   #27
deandob is offline deandob  Australia
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Quantran,

I believe previously you had a TDA1541 NOS DAC (same one I use, twin TDA design) - I'd be interested in your assessment of your new DAC in NOS vs the TDA1541?

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Dean
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Old 4th June 2007, 02:02 PM   #28
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Hi Dean

The PCM63 DAC is not yet ready to compete with my tda1541a. Certain parts used in the PCM63 are not as goods as I would like, most importantly the XO. I have not been able to find a decent XO for the PCM63. Some resitors in the analog stage are cheap Chinese parts. It's not fully break-in.

The strong point that can easily be heard in the PCM63 is more precise, excellent frequency extension and well controlled bass. It's surprisingly smooth sounding for its mosfet analog stage.

At the moment, my TDA1541a still has the advantage in term of musicality. I have never stopped upgrading it.


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Originally posted by deandob
Quantran,

I believe previously you had a TDA1541 NOS DAC (same one I use, twin TDA design) - I'd be interested in your assessment of your new DAC in NOS vs the TDA1541?

Regards,
Dean
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Old 31st August 2008, 03:58 PM   #29
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For those who wants to use PCM63 in NOS mode, this is the schematic for the receiver module. It works perfectly. Sounds great!!!

J2 is out signal to feed PCM63s

Pin 1: Serial Clock
Pin 3: LE Right
Pin 4: LE Left
Pin 5: Data

J1 is used for configuring the receiver module for 16 bit, 18 bit or 20 bit DAC. Adding one more 74HC164 will give the compatibility with 24 bit DAC e.g. pcm1704.
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Old 27th November 2011, 07:02 PM   #30
Jos1961 is offline Jos1961  Netherlands
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Dear Quantran ,

I'm very interested in your PCM-63 project in NOS.
Can I buy the printed circuit-boards from you ?
Hope to hear from you , thank you very much , kind regards , Jos Humpig
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