DLPS082 February 2017 DLPA100
PRODUCTION DATA.
In this case, the PWB has a single isolated ground layer around the DLPA100 circuit. This ground layer serves as a “noisy” ground for the switchers, linear regulators, and motor driver. An additional “quiet” solid ground plane should be provided on a separate layer for reference to the sensitive blocks of the DLPA100 and other sensitive external circuitry. Connect the “quiet” and “noisy” ground planes at the DLPA100 thermal pad array of vias.