Analog ground/Digital ground question
Splits or cuts in ground planes generally create more problems than they solve. Placing components strategically so the digital signals avoid the analog section is the best approach. Digital signals should be routed so that their ground return path does not go through the analog section. Also proper design of both the digital and analog power delivery network to reduce power supply noise from propagating through the board is helpful. In addition to ferrite beads, Linear regulators on the analog power supplies can help to reduce noise. Another thing you can do is to control the rise time of the 2 MHz clock by using an RC network. Since 2 MHz is a relatively low frequency, you don't need a fast rise time.