Yes, you will need a buffer amplifier. To reduce device count etc I would suggest the following:
- Separate the the analog mux and the ADC and build your own SeqADC
- Use a PSoC5 internal buffer amp or a follower past the AMUX
- Connect AMP output to ADC
This way you just need one internal OpAMP, no more external parts needed.
Thank you Bob, as usefull as always. Great idea.
I will do so.