Differential Op-Amp Circuit to translate +/-10V DAC signals from test equipment to 0-3.3V for Teensy 3.6 Board
Finally got around to testing the op-amp section of the circuit. It works as advertised. The linearity is pretty good. :)
Following advice, I used the 3.3V as my bias voltage. Can't quite seem to get it down to 0V but this would work too with minimal additional components.
@K.C. Lee suggested using a resistor divider network with a bias voltage to scale and shift the +/- 10V to 0-3.3V. Duh! Why didn't I think of that? Added a LTSpice schematic and output plots of a circuit that gets the job done. I've already ordered the uber expensive LT op-amp, switched capacitance bipolar power supply, and linear regulator for the gen 1 design. Diligently pursuing sunk cost fallacy, I will build up and use the op-amp version for now. For the cost of a semi-precision 10V linear regulator and a few resistors I could've been down the road. Live and learn I guess. Thanks again @K.C. Lee!