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DS92LV1212A -- AGND and DGND

Madhu Vatte
Intellectual 835 points

Hello,

There are separate pins for Digital and Analog ground. Are these to be separated/filtered? Other video applications will actually separate the Power and Ground pins with a filter so that the digital noise doesn’t affect the analog performance.

Do you have any clear direction on how to implement this in the design?

Thanks,

Madhu

  • 0
    Guru 25210 points

    Generally, you filter the DVcc into a separate AVcc (or supply from separate regulator such as an LDO).

    AVcc should be decoupled to AGND only. AGND should be a small separate island with only one connection to your larger ground plane. This way only analog IC current and analog Vcc decoupling currents are on the AGND mini-plane.