I'm designing a signal acquisition system with an ADC. I have these questions:
1- Any cons or pros related to connecting the analogue and digital planes using ferrites or inductors. Or should I just connect them directly with a trace/wire at one point near the main supply ground?
2- There is a document on Analog website that states:
"Be sure to properly decouple each supply pin at the device with a 0.1-µF ceramic capacitor. Remember to decouple to the analog ground plane, not the digital ground plane"
I find it odd that the digital supply decoupling cap is connected to analogue ground? Wouldn't digital ground be a better choice?
3- What ground do I connect the sensor shield wire to? I'm guessing digital because I wouldn't want the noise it brings in on my analogue signal. Is this correct? Edit: Or a third option, chassis ground?