• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 31 subscribers
  • Views 2118 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TLV320AIC3104: Noise coming from the DAC

michael musset
Expert 1135 points

Part Number: TLV320AIC3104

Hi, we observe noise coming from the DAC, Can someone check if my schematic is correct ? 

  • 0
    TI__Guru* 84915 points
    Hi, Michael,

    The schematic seems to be all in order. I only recommend to leave the LEFT_LOP/M and RIGHT_LOP/M floated if they are not being used.

    I recommend to follow the indications of this wiki article. It contains useful tips to reduce noise in the board:

    e2e.ti.com/.../3377.common-noise-issues-in-codecs

    Additionally, do you know if the noise that you are observing is out-of-band noise? I mean, is it inaudible noise?

    For out-of-band noise, we recommend to add a low-pass filter as mentioned in the document below:

    www.ti.com/.../slaa313.pdf

    I would recommend to try with a 1Kohm resistor and a 4.7nF capacitor.

    Finally, if the problem persists, could you provide your registers configuration in order to have a better approach to this issue?

    Thank you.

    Best regards,
    Luis Fernando Rodríguez S.