Hi,
This is not very difficult:
you need to use two outputs : one for positive output and one with an OPA as an inverter ( gain = -1 ) for negative output.
Of course a negative supply is needed ... think to max 232, ICL 7660 or similar as the negative voltage generator ... if no output power is needed.
BTW ... which is the final use ??? already done designs surely exist ... ( electrical stimulators, i.e.)
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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