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TLV320DAC3100/TLV320AIC3111 Power-up Sequencing and PCB Layout Recommendations not in datasheet

James Evans
Mastermind 49692 points
Other Parts Discussed in Thread: TLV320DAC3203

Hi!

I am planning to use these devices, but I couldn't find the details listed above in the datasheets or EVM guides.

Are there any app notes or generalized datasheets that contain this information that I'm missing here?

Thanks,

James

  • 0
    TI__Guru 64266 points

    All rails should power up within a few ms. All rails must be stable before releasing reset.

    The EVM user's guide has a layout example.

     

  • 0 in reply to Dominik Hartl11
    TI__Mastermind 49692 points
    So no sequencing is required here? Can someone provide a reference this info?

    I was only able to find device initialization information for the TLV320DAC3203 device (www.ti.com/.../slau434.pdf), not the DAC3100. Is this information directly applicable for the DAC3100?

    Regarding layout, I was only able to find the layout example in the TLV320DAC3203 EVM guide (www.ti.com/.../slau441.pdf). I noticed there was some thermal vias for the DAC3100 and some plane splitting in various layers. Are there any additional layout examples for the DAC3100 with explicit recommendations?

    Unfortunately, it seems like some of this information is not shared across the audio family datasheets, and I want to make sure I use these parts correctly.

    Thanks,

    James
  • 0 in reply to James Evans
    TI__Guru 64266 points

    About the sequencing: It's important that the supplies are on at the same time, especially after the part is configured. Do not leave one off and another one on because this can lead to back-powering blocks inside the chip through paths that aren't designed for this. After a reset, the codec is in a low power state (everything inside is powered off except for the control interface logic) so it's not that critical but once you actually use the device, all supplies must be on.
    As for the reference: The d/s states that all supplies must be stable before releasing reset. This is the important information that you have to follow.

    You can use the gerbers as a layout example.

     

    Gerber.zip