impedance matching of mux and microcontroller

[M.Imran Ali]

Hi
i am interfacing CD4067BE multiplexer IC with pic micro controller but there is a signal drop of 1.45 volt across the mux . I dont want that and want full signal on input of adc of microcontroller. i think it is due no miss matching of impedences/ is it how can i solve this problem ? Please reply fast as soon as possible if any one can?

 

[sivamani]

Looks like this is abnormal behavior..Generally there will not be huge drop with impedance mismatch .Looks like problem is something else.please check the circuit once again.