I have an HCPL-7840 isolation amplifier. It's input side is connected to some high voltage (~300V) power circuitry.
It produces a differential output signal that is nicely isolated from the power side. Each of the two pins that form the signal are between 1.29 V and 3.80 V with respect to the ground of the output side.
I want to take that signal and feed it to the analog components in my MCU, which is an ATXMEGA128A3U. It shares a ground with the output side of the isolation amplifier. And it accepts differential inputs. But it requires that both voltages be between 0 V and 3.3 V, and further that the differential voltage be within +/- 1 V.
How do I glue these things together? I have some understanding of how it is done for single-ended signals, answers to that problem are crowding out the answer to this problem in my search attempts.
I have two uncommitted DACs in the MCU that can output a reference voltage for what I want the new common mode level to be, if it helps.