[quote author="Rochey"]Delta-Sigma Theory...
Put simply, most ADC's sample at 128 or 256 times the desired sample rate in one or more bits (TI has 1 and 6 bit devices)... that signal is then put through a filter which essentially converts a high speed (128 x 44.1KHz) single bit signal into a multibit, lower frequency signal.
The advantage of this is that depending on your digital filter design, you can generate an output at almost any sampling frequency at any bit depth.
but that's a whole other topic
This looks like another good source of info - if we assume that the ADC basically is an analog to DSD coverter with an additional filter to make it PCM.
http://www.korg.com/mr/Future_Proof_Recording_Explained.pdf[/quote]
I have been told that actual AD converters use all the 1 bit recording mode. They work at a fixed frequency at around 13 MHZ, and the output sample rate is the result of converting DSD to PCM.
I´m still interesting on the CBD5381 eval board from Cirrus Logic.
Just have doubts about the power supply would need. I would like a 12V mobile supply, but not sure if would give good result.
Any other one interested on building this converter based on this Eval board?
