What ground wiring pattern do you recommend? "Figure 105. Layout of Board", p.73 of ads5263's datasheet shows common ground plane both for analog (AGND), digital (LGND) ground pads of ads5263. We are considering to split them into 2 ground planes, connected at one point in order to reduce interference between digital signals and analog part of ADC. Would you recommend such practice and where should we connect those ground nets to each other?