I have a circuit problem that I'm trying to find a solution for.
I have an 8 output IO expander which outputs 0V-5V. It is running analog switches which have a Vdd and Vss of +-2.3V.
Using the 5V right now is causing a dc offset and noise on the output of the analog switch.
I know I could just use an op amp to translate the voltage level, but that would require a lot of hardware for all 8 outputs.
I can't seem to find a level shifting IC that will accept a 5V signal and output a differential analog signal.
I've also thought about running it off of an 8 channel DAC. But that would be a costly solution.
Update for clarity: I am looking for a single IC that can accomplish the level shifting for all 8 signals instead of having to use a group of discrete components for each signal. OR, I am looking for an 8 ouput IO expander that has seperate supplies for communication with the microcontroller and IO outputs.