PROPER GROUNDING OF ADCs , DACs , AND OTHER MIXED - SIGNAL ICs
نویسندگان
چکیده
Each PCB in the system should have at least one complete layer dedicated to the ground plane. Ideally, a double-sided board should have one side dedicated to ground and the other side for interconnections. In practice, this is not possible, since some of the ground plane will certainly have to be removed to allow for signal and power crossovers and vias. Nevertheless, as much area as possible should be preserved, and at least 75% should remain. After completing an initial layout, the ground layer should be checked carefully to make sure there are no isolated ground "islands." IC ground pins located in a ground "island" have no current return path to the ground plane.
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