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PCM1690：No output

Feng Cheng Chang
Prodigy 20 points
Part Number: PCM1690


Tool/software:

Hello Experts,

I am using PCM1690 DAC but no output.

Is there a problem with PCM1690 settings?

Circuit : 
https://photos.app.goo.gl/eivEM1BkrGcS33X66


Voltage & Reset : 
https://photos.app.goo.gl/2dhmUAf3s6R1Gf5n9

control states : 

https://photos.app.goo.gl/U8LXnqDUvTn3Bd47A

Signal Input & Output : 

https://photos.app.goo.gl/S818QWffAMdDR1MX9

Thanks in advance, Tom

  • 0
    Prodigy 20 points

    sorry,I use hardware mode.

  • 0 in reply to Feng Cheng Chang
    TI__Mastermind 31041 points

    Hello Feng,

    According to your schematic, you are putting the device in to I2C mode by pulling down the MODE pin. But you say it is in HW mode. If so, device is expecting I2C and is not receiving it.

    Few other suggestions:

    use 1u + 10uF for ALL supplies.

    Please make sure that you are not resetting or muting the part, both are active low. from the plots seems MUTEI is LOW, I can not tell as other plots are covering them.

    The FMT sets the expectation of the IC, I2S or TDM. Either case,  make sure your format matches with your clk/Din set up according to:

    BCK= number of channels  x bit depth x FSYNC   

    For example, for 48K and 24 and 8 channels, you BCK has to be 9.22MHz

    Let me know if you still have any issue.

    Regards,

    arash