Very true........there are indeed several ways to design each circuit......and zillions of incorrect ways to design them.

The 0->10 volt approach has the advantages of S/N ratio improvement as Kai has pointed out. But I think the divider resistor idea is a reasonable choice, particularly of the application is one with only an 8-bit A/D converter. Today's surface mount resistors make this an extremely compact solution, even for eight channels. The resistors can also be particularly nice to have on the circuit board on applications where analog signals are being brought in from off board to provide surge protection limiting for the mux chip. In selecting the divider resistors one must take into account the source driver impedance of the analog signal and also the ON switch impedance of the analog mux. And as I pointed out in my very first post to this thread, if the analog input signal is not a DC signal (or if its varying at a rate over about half the sampling rate) then it may very well be necessary to add a low pass anti-aliasing filter on the output side of the mux. The divider resistors can be leveraged as part of this low pass filter.

Michael Karas