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14th November 2003, 05:38 PM
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#1 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I must be crazy to build my DAC this way
I finally decided to build TDA1541S2 based DAC. As usually I'm looking for best ways to implement the mechanical aspects of the design, so this is what I think could be a proper method to dress up S2 chip
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www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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14th November 2003, 05:41 PM
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#2 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Initially I was considering PCB, but somehow didn't like the restrictions dictated by 2 dimentional plane. So last evening I took a piece of brass and played with it a bit. I mounted the chip on top of 1/2 square rod and attached to it on top a piece of PCB forming ground plane. The rest is pretty self explanatory. I wonder myself if this is a good move or not?
Any comments on 560p Wima? I didn't know if this a good choice, but that's what seemed to fit there.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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14th November 2003, 05:43 PM
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#3 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Worth noting is the way I attached SMD cap bypasses (X5U 0.1u and X7R 0.01u). This is technically the shortest path possible. Look under 2 BG caps on the right.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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14th November 2003, 06:08 PM
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#4 |
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diyAudio Member
Join Date: Jun 2002
Location: Serbia
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Hi Peter,
Yes, it is OK I'd say (excellent actually), but try to divide digital and analog grounds before you joint them. Decoupling caps (pins 26 and 28) belong to the digital, those 14 caps to the analog part. Pedja |
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14th November 2003, 06:11 PM
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#6 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I was thinking about splitting grounds, but checked the PCB board on my Marantz CD 94 and both grounds were connected at the chip (same ground plane). Doing it this way definitely simplifies things, but I'm not sure how this affects sound. If they are separated at the chip, were should they meet then?
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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14th November 2003, 06:14 PM
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#7 | |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Quote:
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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14th November 2003, 06:19 PM
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#8 | ||
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diyAudio Member
Join Date: Jun 2002
Location: Serbia
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Quote:
Quote:
Pedja |
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14th November 2003, 06:23 PM
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#9 | |
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diyAudio Member
Join Date: Jun 2002
Location: Serbia
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Quote:
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14th November 2003, 07:54 PM
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#10 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Pedja,
I just checked your site and the info is good as usually (on TDA1541 Dac)
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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