The answer is simple ...
Use a Voltage Ref !!! a TL431 i.e is cheap, TO92 shaped, and easy to trim ...
OR use a Temp to Digital ( DS18B20 i.e.) or temp to PWM ( SMT 160-30 i.e ) sensor ...
No miracle to wait for !!!
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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