PCM2707, I2S out

[josiphal]

To erozsolt:

PCM2707 format is I2S, but AD1865 work with 18-bit MSB first (not I2S).
For conversion from 20-bit I2S to 18-bit MSB first, look here.
Any conversion from 16-bit to >16-bit is not easy.

To 000940:

Try TDA1543 first.

Josip

 

[00940]

Josip : have you tried both ?

 

[josiphal]

Hi 00940,

I have TDA1543A connected to CD-ROM LRCK/BCK/DATA lines.
TDA1543 is simple and cheap solution.

Maybe PCM1794 is better? I didn't try it.
My future project is PC2707 & TDA1543...

Josip

 

[err_smart]

Can anybody tell me about PCM2707 I2S out jitter value?

 

[dddac]

I have implemented the 2707 as USB to I2S converter and although I have read some comments, that there will be no improvement, taking a XO clock (tried it or just thinking ?), there is for sure an improvement ! No day and night, but for the money you spend on a XO clock (29 Euro) a very good tweak, worth it....

You can use the 2707 as dac it self, but it is not "high end". ranges like an average CD player, which is better than most sound cards of course. All is relative ... But with the I2S at hand, you could feed any DAC with I2S input (like I like the TDA1543) If you need a master clock signal, indeed, than you have a draw back... The only thing comes to mind, is using another free running clock again and do aysnchrone reclocking....

any way, below is the circuit, so you can have a look how I implemented the 2707.... (page 8 of pdf doc)


Link to Circuits PDF

doede

 

[00940]

There studies of the pcm2707 jitter here : http://www.diyhifi.org/forums/viewtopic.php?p=8368&highlight=#8368

 

[mravlcax]

Hello

I know this is old theme but I need some help. I made pcb after this scheme, which is posted. I connected i2s outputs to the TDA1543 but its not working. Can someone verify if my scheme is correct. The PCM2707 is supplied from USB.

Regard Aleš

 

[mravlcax]

Haven't see that I didn't post the file.

Regards Aleš