Might take a look at:
http://www.diyaudio.com/forums/show...8700#post868700
Russ and Twisted Pear have already done some great designs and this is looking good.
http://www.diyaudio.com/forums/show...8700#post868700
Russ and Twisted Pear have already done some great designs and this is looking good.
http://www.diyaudio.com/forums/showthread.php?postid=868700#post868700
Cut and paste never seems to work right.
Cut and paste never seems to work right.
Instead of waiting for someone else to design a differential 1704 DAC for you, why don’t you do it yourself? Isn’t that what diyAudio is all about?
Here is a layout idea for four 1704 DACs arranged as differential pairs using through-hole components. It is compact and symmetrical. I did it in about an hour using the free software from ExpressPCB. Four boards with silkscreen and solder mask would cost $179. Three boards without the frills would be $51. Because ExpressPCB doesn’t do bottom side silkscreen, the component outlines are all on the top surface and overlap each other. It’s a bit of a puzzle to figure out which parts go on the top, which go on the bottom, and in what assembly order to make everything go together.
Here is a layout idea for four 1704 DACs arranged as differential pairs using through-hole components. It is compact and symmetrical. I did it in about an hour using the free software from ExpressPCB. Four boards with silkscreen and solder mask would cost $179. Three boards without the frills would be $51. Because ExpressPCB doesn’t do bottom side silkscreen, the component outlines are all on the top surface and overlap each other. It’s a bit of a puzzle to figure out which parts go on the top, which go on the bottom, and in what assembly order to make everything go together.
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I don't get it. What's the benefit of two PCM1704 per channel? Why not just take one output and convert to balanced? I would think this is better that two converters that are not matched.
You don't get any more bits of resolution. Maybe 3dB of SNR. What am I missing?
jh
I am looking for a DAC like this - go to www.hagtech.com/pdf/hagdac.pdf
but additional with a NOS operation mode - go to www.pavouk.org/hw/modulardac/en_pcm1704.html
so as a second solution for I/U converting as to find by Nelson Pass' "D1" DAC.
Who know such a kit?
Which switching solution is the best for selecting between the various modes?
Thank you for your informations.
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