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Need help on TDA1541A dac

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I built a Thorsten 1X sampling DAC recently. I used TDA1541A instead of TDA1541. I found the IC outputs had 0.1VDC. Was it normal? How can I make it zero volt? What is the difference between these two ICs.
Thanks in advance.

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Re: Need help on TDA1541A dac - Ryan 06:30:15 09/28/01 (1)
Yes the 0.1V DC voltage on the output is normal. You can block that with a good quality DC cap if you really want to. Your pre-amp probably has an inout capacitor to block DC anyway.
I'm not so sure what the diff is between the two chips is, but any differences are probably very minor.
About the zero-output, give more details on teh set-up, i.e. are all power supply voltages presnet (+-5 and -15).
Provided you got the connections to the CS chip right, this should be pretty straight forward. I have not personally used the CS chip, but have enough experience with the TDA1541 to say that it is a fairly friendly beast. Just feed it properly!
- Ryan, thank you! - zen 05:15:25 09/29/01 (0)
  Thank you for your information. If 0.1VDC at output pins is normal, I need not to worry about it.
  I found my dac's malfunction was caused by imporper working mode setting of CS8412 and was fixed.
Re: Need help on TDA1541A dac - Thorsten 02:48:04 09/28/01 (3)
Hi,
It is possible that the little Chip Cap that get's the continous calibration thing going is missing, on some version it is on-chip on others it must be added external.
Otherwise you may have all sorts of other Mixups, well, it's a pretty advanced project and definitly not suitable for people with limited experience.
Later T
- Thanks, Mr. Thorsten! I switched to BB PCM56 dac chip. - zen 06:33:45 09/28/01 (2)
  I'd added the chip cap to pins 16 and 17 of TDA1541A, it still didn't work. I switched to PCM56 and it worked.
  My first DAC project ended up in failure :)
  - Re: Thanks, Mr. Thorsten! I switched to BB PCM56 dac chip. - Elso Kwak 08:22:21 09/28/01 (1)
    Hi Zen,
    You just provided youself the information why your dacproject does not work with the TDA1541:
    For the TDA 1541 the CS8412 should be in mode#2 that is M2=0, M1=1, M0=0.
    For the PCM56 you need mode #5 that is M2=1, M1=0 and M0=1. See the datasheet how to implement these modes. Apparently your CS8412 is in mode 5.
    Even without the cap between pin 16 and 17 you get sound output with the TDA1541. Only low level signal is inflicted.
    Hope this helps.
    ELSO
    - Mr. Kwak, thank you very much, problem fixed. - zen 05:02:21 09/29/01 (0)
      With your hint, I fixed the problem. Thank you very much.
      There was an erra in Mr. Thorsten's schematic. I was surprised that no one had ever told him to fix it. I will tell him.
ps: no audio output too - zen 23:53:04 09/27/01 (0)
I used resistor, transformer and OP amp as I/V converter, there was no audio output. I tried with 3 brand new TDA1541A, same result.
I tied it to a CS8412, the inputs at LE, BCK and DATA were found in order by inspecting it with an oscilloscope. What's wrong?

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