I am using a Raspberry Pi and a Adafruit MCP4725 to control a mass flow controller, as well as powering the DAC, and I am meeting the bare minimum of current to control it with the Adafruit MCP4725. The voltage range is fine. Is there a way to up the current available, even just a little?
A good way is the voltage follower circuit. Select an opamp with a low voltage offset, and rail to rail. Make sure the current of the opamp is higher than what the mass flow controller input needs. Vcc is set to near the DAC output (you could go higher if the mass flow controller output will allow.
Make sure bypass capacitors are used on the Vcc terminals.