In the schematic below there is a sensitive ADC and sensor with 4 MHz SPI lines from the ADC to a 3.3V MCU, along with a 1 MHz boost converter powering an LCD. Could switching noise generated from the boost converter travel backwards through its power supply to affect the analog and digital LDOs? And if so would placement of ferrite beads as shown be a good approach to isolate the LDOs from the noise? And could the analog LDO be affected in the same way from noise in the digital LDO if the ferrites were not in place?
The PCB is 2 layer and has an analog and digital side with a ground plane, I haven't tested it or made it yet, I'm just looking for help on design. Thanks.
ADC LDOs to be used: http://ww1.microchip.com/downloads/en/DeviceDoc/mic5305.pdf
Boost converter: https://www.torexsemi.com/file/xc9141/XC9141-XC9142.pdf