Part Number: ADC128S102QML-SP
Other Parts Discussed in Thread: ADC128S102,
What will it take from TI to modify its ADC128S102 (all of its variants) by disconnecting input MUX output from the rest of internal circuitry and adding 2 more pins: one for this MUX output, the other to where MUX was connected before (sampling capacitor circuitry). In this case user can either connect them together to mimic an original architecture, or insert an OpAmp, thus reconciling of high impedance MUX sources with sampling capacitor low impedance requirements; user can also change this OpAmp gain if needed. Or TI can at least insert a unity gain buffer without any extra pins between the above mentioned nodes.