Tweaker's Asylum

• Re: Need help with TDA1543A DAC; JAP. format but still bad Elso Kwak 03:33:16 04/15/01 (6)
  In Reply to: Need help with TDA1543A DAC posted by Elso Kwak on April 14, 2001 at 14:36:47:

  Hi,
  During eating my Eastern croissant my eye fell on the plastic bag the TDA 1543A was in. It reads JAP. FORMA. So I changed the CS8412 to format # 5. The TDA 1545 also has Japanise format and from the datasheet it looks like it wants to receive format #5.{BTW the TDA 1545 is used in the AH Tjoeb and has the sane pinout as the TDA1543.} I can recognize the music but it is 100% distorted. Strange things are happening; better build with the TDA 1541. Is this one true I2S format? I got the TDA1541A S1. Also noticed a wiring error on Thorstens website. But Lesha got it right, I believe.
  Thanks again,
  ELSO
  

  • Lesha's website

  
  

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  • Re: Need help with TDA1543A DAC; JAP. format but still bad Lesha 16:16:10 04/15/01 (3)
    In Reply to: Re: Need help with TDA1543A DAC; JAP. format but still bad posted by Elso Kwak on April 15, 2001 at 03:33:16:

    Elso,

    Yes, TDA1541(A) accepts I2S if pin 27 is connected to +5V supply. And yes, better build with the TDA1541. I've tried Kusunoki DAC and I agree with Thorsten's words "very nice, alive and realistic, but a little rough". TDA1541 is as nice, alive and realistic as TDA1543 but not rough at all.
    BTW, there's one more significant difference with Thorsten's DAC: I use parallel TDA1541s. If you ever decide to play with parallel TDA1541s you'll see how big the difference is (definitely worth soldering that extra 17 caps :).

    Bye,
    Lesha
    
    
    

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    • Why parallel TDA1541's Rbroer 16:44:21 04/16/01 (1)
      In Reply to: Re: Need help with TDA1543A DAC; JAP. format but still bad posted by Lesha on April 15, 2001 at 16:16:10:

      What's better with dual TDA1541's Lesha compared to one ?

      I've got two TDA1541A's on my bench for a Thorsten like DAC (I will a seperate LClock 8Mhz at the TDA and feed it back to my el cheapo Philips CD723 transport), so I could try.

      Is it worth getting the more expensive and even harder to find Silver crown versions ?
      
      
      

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      • Re: Why parallel TDA1541's Lesha 17:39:20 04/16/01 (0)
        In Reply to: Why parallel TDA1541's posted by rbroer on April 16, 2001 at 16:44:21:

        Paralleling DAC chips is a well known trick, it reduces noise and average bit weight errors. A difference between one and two chips is significant, I haven't tried more, may be someday I'll try.
        Note that paralleling two DAC chips doubles output current and thus requires adjustment of I/V converter. In case of Thorsten's I/V converter/filter you should check if the transformer can handle 4ma quiescent current and if it can then replace 20 Ohm I/V resistors with 10 Ohm.
        Since silver crown means special selection for lower bit weight errors (that is lower distortions) paralleling DAC chips should level the difference between standard and silver crown versions.

        Bye,
        Lesha
        
        
        

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    • Re: Switching to TDA1541 Elso Kwak 16:07:05 04/16/01 (0)
      In Reply to: Re: Need help with TDA1543A DAC; JAP. format but still bad posted by Lesha on April 15, 2001 at 16:16:10:

      Hi Lesha,
      Thanks, I was focussed on the interface between the CS8412 and the TDA1541. There are more differences between your DAC and Thorsten's. Yes I will use two TDA 1541 chips in my DAC but not paralel as in your DAC but in a Balanced configuration (solid state). Thanks again,
      ELSO
      
      
      

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  • Thorsten's DAC Daniel Espley 04:43:22 04/15/01 (1)
    In Reply to: Re: Need help with TDA1543A DAC; JAP. format but still bad posted by Elso Kwak on April 15, 2001 at 03:33:16:

    Hi Elso,

    Here's what Thorsten told me recently:

    "Please note that two of the Receiver/DAC connections are mixed up and that the Analog Stage now has an around 0.1uF "tuning" capacitor
    across the lower cathode resistor of the SRPP. The 3k9 resistor in
    series with the 1n Cap in the LC filter is also deleted."

    Dan (sharing and enjoying)
    
    
    

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    • Re: Thorsten's DAC, Yes that's it. Elso Kwak 06:05:54 04/15/01 (0)
      In Reply to: Thorsten's DAC posted by Daniel Espley on April 15, 2001 at 04:43:22:

      Hi Daniel.
      Yes the signal lines from the receiver to the dac were mixed up. I posted a correction on the Guest Board of Thorstens site. Or just have a look at Lesha's site. Lesha uses the same DAC; only has a different output stage and some minor supply details.
      Thanks for the prompt reply.
      ELSO.
      

      • Thorsten's DAC

      
      

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• Re: Need help with TDA1543A DAC Rbroer 20:48:37 04/14/01 (0)
  In Reply to: Need help with TDA1543A DAC posted by Elso Kwak on April 14, 2001 at 14:36:47:

  I experienced the same with the Yamaha reciever chip YM3623B.
  I just bought the CS8412 but did not try it yet.
  I'm also using 4 pieces of TDA1543A.
  Could you please update when you sort this out ?

  Regards, Rudolf .
  
  

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• Re: Need help with TDA1543A DAC Vuki 17:09:49 04/14/01 (1)
  In Reply to: Need help with TDA1543A DAC posted by Elso Kwak on April 14, 2001 at 14:36:47:

  I used "N" version and it works fine. However TDA1541 sounds much better and is not much more complicated to build (except that it needs analogue section).
  
  

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  • Re: Need help with TDA1543A DAC; Finally figured it out! Elso Kwak 10:56:18 04/20/01 (0)
    In Reply to: Re: Need help with TDA1543A DAC posted by Vuki on April 14, 2001 at 17:09:49:

    Hi Vuki,
    I finally figured it out. The TDA1543A only accepts data in the OB (offset binary) format; the TDA 1543(N) accepts only in the two's complement format. The CS8412 only produces two's complement so it will never work with my TDA1543A. Nowhere is written in the Crystal or in the Philips datasheet about the two's complement format. Neither did I receive a dataheet (for TDA1543A) or response from Philips. I found it because some Philips digital filters produce the offset binary format; Philips cals it S-format. Do not ask me to explain the exact difference between the two formats. I am a digital Neandertaler.
    But I got my DAC working with the TDA154AS1!!! WOW. See my new post.
    Thanks for the help.
    ELSO
    
    

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