I want to use a unipolar 12-bit DAC (MCP4725) as a function generator with bipolar output (from -2.5 to +2.5V). Problem is, I only have two supplies of +5V and +12V referenced to the same ground, so most opamp based solutions go out the window since I am unable to give a negative power supply to the opamp. I need to get a bipolar output from this circuit, where the 'ground' (reference) of the circuit using this bipolar output is the same as the ground of the power supplies.
I have given this some thought and arrived at a conclusion that logically it would not be possible to get bipolar output from unipolar output. However, the wise people here have proven me wrong earlier and I wanted to try my luck.
TL;DR: Get bipolar output from unipolar DAC, only positive power supplies, same ground everywhere.