High speed OP-amp PCB layout constraint

[arunmaran10]

Hi all,
I am using High speed op-amp for DAC board, is there any routing contraint(Say cutout ground plane beneath IC Input Pin). please suggest some some layout constraint for this.



Regards,
Arunmaran

 

[senilicus]

Look at the datasheet of the device.

There might be a layout section with do and do not specifications

 

[marce]

Some high impedance inputs can be affected by the capacitance between the Pad and the ground plane (couples HF noise), but it is the minority, I second the recommendation to read the data sheets.