Currently i am making the PCB (for analog front end) for the digitization of some sensors(electro-chemical and photo-ionizations).
To simply the things this sensors are giving output in Milli volt(photo-ionizations sensors) and uA current(electro-chemical sensors).
I have BOTH(independent) the circuit ready which are taking input and giving digital output. (one circuit is based on the trans-impedance amplifier while another is based on the operational amplifier) Now the thing is i want to make a single channel PCB which works for both the sensor(one at a time) at same input terminal. All the sensors have the 3 leads. Probably i required the programmable switch (decoder demultiplexer) so that MCU can switch the routing path of that 3 leads when user gives input to the MCU. (when sensor(uA output) is connected then he will press the switch-A and vice versa for the sensor(mv output) with switch-B).
Please let me know suggestion that it will work or not for that lower inputs (i mean very low current and voltage).Any suggestion of the IC will be great help.
Added below details lead terminal of sensor Info :- - 1:- GND - 2:- Current Output/Voltage Output - 3:- Not Used in most of cases.
Range of mills volt :- 1mv to 500mv Current output sensor are just floating photo sensors.
Speed for switching is not concern i can adjust with lower speed also. And isolation is also not required for ground of both sensor.(however isolation will not be in picture as at a time only any one sensor get connected)