Recently I've taken over a project which requires low noise but the design given to myself does not meet the requirements. I noticed on the PCB design It has a single Power Plane with 2 separate voltages (+5v & -5V).
Should I seperate these power sections into 2 separate planes to reduce potential for noise between the 2 voltage section in the single plane?
From my research it seems bad for noise to have a ground plane to have 2 separate sections (Analogue & Digital GND) as there can be voltage difference between the sections. People recommend connecting these sections together to reduce these noise issues. Obviously in this circumstance you can't connect these 2 sections, so that's why I thought separate planes might help.
Any and all help will be greatly appreciated. Thank you in advance!