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TLV320aic3120

Russell Wetherley1
Expert 4255 points
Other Parts Discussed in Thread: TLV320AIC3120

Hello E2E!

I have a few quick questions on the TLV320aic3120.

  • Can SPKRVDD be tied to same voltage as AVDD?  Does this affect sound?  Are there any power consumption repercussions?
  • Is there a difference in amplitude between 4W speaker vs 8W speaker?  For this application, the louder the better.
  • Will we need to develop software to optimize sound/AGC for our application?  Are there any code examples found outside of the product folder online?  I'm assuming this will need to be done through PurePath?

Thank you very much!

Regards,

Russell

  • 0
    TI__Guru* 84915 points

    Hi, Russell,

    1. These codecs are designed to be tolerant to the power supplies connections. However, there have been several cases were the power supplies sequences have affected the audio performance. So, in order to avoid these unexpected cases, it is suggested to turn on the SPKVDD power supply at first, then the digital power supplies (such DVDD, IOVDD) and AVDD at the end. So, I would suggest to separate SPKVDD and AVDD in order to expect the best performance.
    2. The difference between 4W and 8W speakers is the power consumption that they can support. There wouldn't be differences in loudness if both are used with a TLV320AIC3120 because this codec has a maximum output power of 2.5W (for 4-ohm speaker). In cases where more power is required, the 8W speaker could reach that needs. However, in this case there wouldn't be difference in loudness.
    3. If you require an AGC for your application, you may use the internal AGC of the codec. This AGC can be configured in order to limit the signal to a certain level. For more information, please take a look of the following document: www.ti.com/.../slaa446.pdf.

    I hope this helps you. Please let me know if you have more questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Expert 4255 points
    Thank you Luis! This is incredibly helpful and I greatly appreciate the quick turn around here! Also, just an FYI, the AGC link doesn't work. I ended up looking up SLAA446 on TI.com.

    Russell