[Note: This code is still WIP.]
The MCP4706 is a single channel 8-bit buffered voltage output Digital-to-Analog Converter (DAC) with nonvolatile memory and an I2C serial interface.
This code allows you to read and write all capabilities listed from pg. 51 to 53 of the datasheet.
The part number used for testing this code is MCP4706A0T-E/CH with device address 0x60. Other part numbers may have different device addresses as listed on page 83 of the datasheet.
Observed deviation from desired output value is 1.3%.