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aye, true, the capacitor would render the voltage divider useless the way I drew it. Rather like this then (sorry, I'm taking small steps here):
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I tried reading up more about suggested...

Thank you for those suggestions! I believe that a lower voltage first stage might be the easier solution but in case this proves difficult, these are great fallbacks!
About the inverting charge pump...

AH!! Damn, you're right, I used a python script that I originally wrote for the differential output *facepalm*
Changed datatype to unsigned integer and get this beautiful sine-wave
ADC0:
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Hello Everybody,

I'm trying to assemble a two-stage instrumentation amplifier for differential analog signals to be recorded single-endedly on the teensy 3.5
My colleague Avner Wallach has...