TDA_1541A input formats - diyAudio
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Old 8th January 2004, 09:55 AM   #1
Zoran is offline Zoran  Serbia
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Default TDA_1541A input formats

Can anybody try the tda1541A in
simultaneous mode input data ?
Does some other DAC chips using that format ?
Maybe some example ?
Thanks...
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Old 9th January 2004, 11:46 AM   #2
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What do you want to connect to the TDA1541A ?
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Old 9th January 2004, 11:52 AM   #3
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Default Amp?

Hello,

unless I am mistaken, you are taking the TDA1514A to be a DAC. As far as I am aware, this is a linear, bipolar, IC amplifier and discontinued by Philips, or am I being stupid?

Edited: Yes, as was demsontrated below. Thanks

Andrew
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Old 9th January 2004, 12:01 PM   #4
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TDA1541A dac chip TDA 1514 amp chip
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Old 9th January 2004, 12:04 PM   #5
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Default Geeeeez.....!

Quote :
.........................you are taking the TDA1514A to be a DAC. As far as I am aware, this is a linear, bipolar, IC amplifier and discontinued by Philips, or am I being stupid?.......................

You tripped badly on this one !!!!!!!!!!!



I love this forum .
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Old 9th January 2004, 01:57 PM   #6
Zoran is offline Zoran  Serbia
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Yes the Philips TDA 1541 A
D/A converter chip...
there is a 3 type of
accepting the digital data...
among the I2S standard
there is Simultaneous L/R data mode...
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Old 9th January 2004, 03:26 PM   #7
guido is offline guido  Netherlands
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Default Re: TDA_1541A input formats

Quote:
Originally posted by Zoran
Can anybody try the tda1541A in
simultaneous mode input data ?
Does some other DAC chips using that format ?
Maybe some example ?
Thanks...
I think you could connect it in this mode to the decoder chips in the first philips players containing the first chipset (14 bit DAC's)

One could try to connect it there before the digital filter.

I think the data goes from 16 bit no oversampling to 14 bit 4* oversampling by the filter. So get an old working philips and try.
I did not myself, but there is a post here from a while ago discussing this. Find it and ask if the guy tried.

So to your second question: TDA1540 is similar, but that one is mono and 14 bit.

Greetings,

GuidoB
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Old 9th January 2004, 05:57 PM   #8
weissi is offline weissi  Europe
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As far as I remember my Sony CDP-M75 uses the TDA1541A (or was it the TDA1514A ;-) in this mode with an 4xoversampling filter named CXD10??? ..... What is your intention to use this mode,

weissi
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Old 9th January 2004, 08:26 PM   #9
Zoran is offline Zoran  Serbia
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My intension is : somehow to split the L/R digital data and then feed the DAC chip...
To use advantage of split chanel power supplys...
I saw a design by mr Guido B. and that is the great solution of course...)
But I think maybe it is possibile to do the same without the lets say complex
programming of the GAL chip...
I have some AD papers about transfering the I2S to drive the AD1851/AD1856
Also I have some Philips Datasheets about the I2S standard and recomenadations for the recever and transmiter.That is very useful. If someone is interested i can post to forum...
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Old 9th January 2004, 10:08 PM   #10
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Quote:
Originally posted by Zoran
My intension is : somehow to split the L/R digital data and then feed the DAC chip...
To use advantage of split chanel power supplys...
I saw a design by mr Guido B. and that is the great solution of course...)
But I think maybe it is possibile to do the same without the lets say complex
programming of the GAL chip...
I have some AD papers about transfering the I2S to drive the AD1851/AD1856
Also I have some Philips Datasheets about the I2S standard and recomenadations for the recever and transmiter.That is very useful. If someone is interested i can post to forum...
In terms of the physical resources required, there is no significant difference between the two methods of creating a balanced dac with the TDA1541A. One can create a balanced I2S signal with three IC's or a single cpld. It would take a similar amount of logic to convert the binary two's complement signal to the complementary offset binary format required by the TDA1541A when in simultaneous data input mode.
There is one advantage to using the simultaneous mode in that the dac will support 8x oversampling.
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