Control a +-10V motor controller from Pixhawk AUX


I am looking for a way to control a Maxon ESCON 36/3 EC motor controller from a pixhawk, but it seems like the analog input on the Maxon controller is +/-10V. is it possible to do this from a pixhawk AUX output with some simple converters?

My initial idea was to send the PWM signal from the pixhawk AUX output to an arduino, convert it to a 0-3.3V signal out of the arduino and then through a dc/dc converter for +/-10V.

Is there a simpler way to do this?