Mel is Right ( as always !!! )
For a project I am developping these days ... I use a DAC to feed the Vref + of the ADC ( external ...) and GND or a fraction of Vref+ as Vref - ...
Note Vref+ is to change with atmospheric conditions ( NO, I didn't tell it's a barometer, ... nooooo ... )
just to artificially enhance the ADC resolution ...
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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