TAD5242: Is this correct chip?

Hi Jan,

Yes the information you received is correct.

• All the following devices belonging to pin-to-pin TAC5212 family will have a top side marking of 'X5212' as these are pre-production devices:

TAD5212, TAD5242, TAD5142, TAD5112, TAA5242, TAA5212, TAC5212, TAC5242, TAC5211, TAC5112, TAC5142, TAC5111.

• Once in production, these will have a different top-side marking for each one. Currently you should see the exact part number on the cover of the package as 'XTAD5242IRGER' , etc.
• Please share the device connections details used for TAD5242 to confirm the device is active?

Regards,

Sakshi

There is our schematic (decoupling capacitors are outside this picture):

PCB is correct. 24-bit input signal is on I2S. Our old DAC CS4344 works with this signal.

Best regards.

HI Jan,

I will take a look at it today and let you know.

Regards,

Arash

Thank you.  I wait.

Hello Jan,

What are the exact values of I2S clks you are sending in? I don't see these values mentioned  above.

Can you send me a screen shot of I2S signals on the scope  , all in one screen , so I can see the edges of all respect to each other? 

I would   not short the unused output pins to GND, rather leave them floating. 

Regards,

Arash

I send BCLK/FSYNC and BCLK/DIN(single mode) scope signals. BCLK frequency is 2,85MHz.

Unused output pins - OUT1- and OUT2- ?

.

Best regards

Hi Jan,

Yes, OUT1- and OUT2- should be left floating rather than connected to GND. Thank you for the scope shots. Arash is out of office today and will continue investigating tomorrow.

Best regards,
Jeff McPherson

I disconnected OUT1-, OUT20 from ground nd a signal appeared at the output.

Thank you for help.

Best regards