LMH1218: PCB layout question about Out0 P/N coupling caps

Mitchell Kary

Part Number: LMH1218

Hi,

Is it recommended to void the reference plane underneath the coupling caps connected to OUT0 P/N for more optimal SI? It is a 12 layer board.

Thank You.

Mitch

over 6 years ago

0 Nasser Mohammadi over 6 years ago

TI__Guru* 93670 points

Hi Mitch,
It is a good idea to clear ground and VCC in the layers in close vicinity to the pads of the AC coupling caps. We normally clear ground and VCC down to the 6th layers.
Regards,,nasser

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LMH1218: PCB layout question about Out0 P/N coupling caps