CICI DAC - another PCM2707+PCM1794A reincarnation

[Green77]

All resistors are SMD 1206 metal film 1%. Caps are all X7R 1206 size. Some DIR9001 batches have issues going up to 192KHz, not that you would need it. Material from the same master sounds the same in my setup and with my ears, whether I play it at 44KHz or 192KHz.

USB connector that fits:
1734035-4 TE Connectivity AMP Connectors | Connectors, Interconnects | DigiKey

Thanks for the info.
What about L1 and L2, 1206 and what value?

BR// Daniel

 

[zdr]

Thanks for the info.
What about L1 and L2, 1206 and what value?

BR// Daniel

This one or similar is ok:
BLM31AJ601SH1L Murata Electronics | Filters | DigiKey

 

[zdr]

I found one potential problem with reset pin on DIR9001. I did not have an issue with my DACs, but it might be necessary to delay voltage rise if you encounter problem with DIR9001 startup. Modification includes lifting reset pin off the board, and connecting it with RC circuit to 3V3 line.

 

[zdr]

Please be aware that shipping outside EU is suspended due to COVID19 situation. Shipping within EU continues, but might be subject to delays.

 

[muzeau]

Hi,
Do you know the reasons of signal AUDIO malfunction ? I dont reach 88khz with optical receiver DLR1130 , is DLR1130 limitations or DIR9001 batch that not perform very well ?

 

[zdr]

Hi,
Do you know the reasons of signal AUDIO malfunction ? I dont reach 88khz with optical receiver DLR1130 , is DLR1130 limitations or DIR9001 batch that not perform very well ?

It’s dir9001, you need to find one that works.

 

[jean-paul]

WM8804/WM8805....

 

[muzeau]

It’s dir9001, you need to find one that works.

I own 3 DIR9001 of the same batch, raplaced two on the board and got the same behaviour, AUDIO and ERROR =1. I checked values of the PLL filter and there is no mistake.... I still have to check the reset pin to insert a reset circuit like ds1817.