[PCB Artwork] I2S Routing

[Kyle_Kim]

[PCB Artwork] I2S Routing (Audio)

Hello.
I have the audio noise problem. I think the cause is I2S's trace length.
This audio system is below.
Analog Audio OUT -> Audio ADC -> I2S -> I2S-HDMI Converter -> HDMI Audio OUT

(I checked Analog Audio out. No noise.)

* Which is better routing in case of very long trace length?
1. anlog audio signal's length is short, and Digital audio signals' lengths is long.
2. anlog audio signal's length is long, and Digital audio signals' lengths is short.
I thought 1 is better because analog signal is more sensitive than digital signal.


* When very long trace length, Have I to add termination resistors, capacitors on each lines?


Let me know your advice....

 

[sivamani]

This is better.

analog audio signal's length is short, and Digital audio signals' lengths is long or shorter.

But if digital signals length is more then please use terminators with proper impedance value..

 

[Kyle_Kim]

Thank you^^ Have a nice day!