Alf
100+ Head-Fier
- Joined
- Dec 28, 2004
- Posts
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Quote:
I added an output ground capacitor CG. It resolves the conflict of different grounds. Also the DAC’s performance when USB powered is very good and it should be even better in the new release. An external PS is not really necessary. While the buffer was required in the previous revisions, I seriously doubt it is needed now.
Quote:
Sorry, it was TPS973xx. I updated my original post.
TPS973xx is cheaper but its availability is poor. Changing the package allows both TPS973xx and REG102 to be used.
Quote:
The power input is supposed to be wired via S1. There is a ground pad next to it.
3V3, 5V, and G3 pads are meant for testing only.
Originally Posted by guzzler 1) I personally liked the buffered ground, it was one of the most frequently asked questions about the old DAC for portable use. |
I added an output ground capacitor CG. It resolves the conflict of different grounds. Also the DAC’s performance when USB powered is very good and it should be even better in the new release. An external PS is not really necessary. While the buffer was required in the previous revisions, I seriously doubt it is needed now.
Quote:
Originally Posted by guzzler 3) How's the availability and cost of the TPS30xx cf the REGs? At the end of the day, it's going to make a pretty marginal difference for this board. |
Sorry, it was TPS973xx. I updated my original post.
TPS973xx is cheaper but its availability is poor. Changing the package allows both TPS973xx and REG102 to be used.
Quote:
Originally Posted by guzzler 4) Could the ground pads be moved directly next to the power inputs, makes life simpler for wiring, and shouldn't obstruct any current routing |
The power input is supposed to be wired via S1. There is a ground pad next to it.
3V3, 5V, and G3 pads are meant for testing only.