schematic with 4 or more TDA1541 parallel

[Bernhard]

progress

4 pre-regulators for 5V -5V -15V for TDA1541 and 12,6V for tube heaters.

12 TL431 regulators for TDA1541.

 

[Salar]

Resurrecting this thread: Linearity of LSB
ist the same between TDA1541A and TDA1541.
No given numbers of THD in the 1541non-A
datasheet, but crosstalk between channels
is worse, 80dB only.

This leads to the question how the i2s
datastream can be demultiplexed to
run one tda1541 for each channel individually
but having both dacs inside the 1541 running
parallel? As far as I understand the 1541 accepts
independent channel data (so both internal dacs can
get the same channel data) but the decoder SAA7020
and Digital Filter SAA7220 only provide serial i2s.
From the parallel designs I know (commercial or non
-commercial) TDA1541 are only parralleled the "classical"
way. Did I miss something? Is there a way to demultiplex the
I2s? Looking at SAA7220 datashheet, i2s data gets demultiplexed
inside this digital filter and then remultiplexed again after oversmpling.
Unluckily the filter was not designed to send parallel data
to the DAC...

 

[rfbrw]

You can rearrange the I2S data from LR to LL and RR or to L and R in parallel and then convert it to offset binary. The TDA1541 can be setup to work wth either.

 

[Salar]

How? Any schematics available? There was an I2S to EIAJ converter that did the same job? As far as I remember with EIAJ the channel data is split, but I might be completely wrong here...

 

[lcsaszar]

Search for Pedja Rogic I2S splitter

 

[Salar]

Thanks a lot! I think the answer lies in this post # 5010 from ecdesigns:

http://www.diyaudio.com/forums/digi...e-nos-dac-using-tda1541a-501.html#post3917324