Adafruit MCP4725 DAC

Hi guys,
I want to use the MCP4725 DAC in order to create the voltages from 0 to 0.9V. The DAC will be powered by 3.3V from a dedicated low noise power supply. What will be the proper way of scaling down the output voltages? Will the simple voltage divider be sufficient or more complicated solutions needed?

A voltage divider will let you use the full range of the DAC. You could also just not send any code that would exceed the limit.

What is the impedance of the device that wants the 0.9 V?

The impedance of the device is 100k. 10-20k resistors will be OK?

Should be.