Part Number: ADS8166 There are several points in the datasheet's diagrams where there is shown an option between using a buffer or to provide a direct connection between MUXOUT-P and ADC-AINP, and again between MUXOUT-M and ADC-AINM. Are they to be done in the same fashion when selecting between these options? What are the performance limitations for going with a direct connection? How does the Thevenin equivalent resistance looking out the mux inputs affect the performance (say 5kΩ, or 1kΩ)? Some sort of kickback from the ADC's sampling caps? Are the ADC's caps arranged also in a T-switch structure or otherwise modified between samplings?
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