DM365 speaker-only Voice Codec power/ground decoupling

Quentin Davis said:

In the DM365 Voice Codec, I plan to only use the speaker output to a small PCB-mounted speaker (No hi-fi for me).  No microphone in.

My question is how much (if any) of the power supply bypassing is needed for VDDA33_VC, VSSA33_VC, VDDA18_VC, and VSSA18_VC?

Electrical field capacitor 10uF + ceramic 0.1uF bypass capacitors are recommended.

In the schematic for the EVM for the DM365, each of these rails gets a ferrite, a 3-term cap, and 5 bypass caps.

 

I couldn't find what power rail the speaker's DAC uses, but I suspect the other rail doesn't need anything.  Because a PCB mounted speaker isn't know for audio fidelity, I'm not even sure the rail that powers the DAC & audio driver needs elaborate bypassing.

I suspect Vcom would still need the 10 uF cap.

Correct

 

PS -- if it matters, I do plan on using ADC_CH0 -- ADC_CH5.

Thanks for any advice,

Quentin