Need help with my PCM2704 DAC


2011-09-22 4:12 pm
I made a simple PCM2704 dac, it worked but there is a serious problem, i can hear a buzz sound that that's very annoying. Then i plug it in my QA400 and here is the result:

The DAC connect to QA400 with 10kohm load, no signal playing, that buzz is clearly visible at around 9khz and 18khz

Dac playing -2.5dbfs
I have attached the schematic and board file in eagle format, hope some one can help me to find out the problem.


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