I am looking to map the output voltage from the onboard DAC of an Arduino Due from its raw range [+0.54V --> +2.75V] into the new range [-10V --> +10V]. I will use an op amp with -12V and +12V power supply rails (Analog Devices OP07).
Orignally I tried to do this with back to back op amps - one to shift the voltage down (by subtracting ~1.65V) so it is first centred around zero, and then a second amplifier to scale up the voltage by a factor of ~9.
However, I wonder is it possible to do this with a single op amp, and without inverting the signal's phase with respect to the input? In addition, I would like any reference for the bias point to be derived from the existing +12V supply rail.
Does anyone have any help on how to achieve this?