LTC1257 consulting

From the datasheet:

VOUT (Pin 7): The buffered DAC output is capable of sourcing 2mA over temperature while pulling within 2.7V of VCC. The output will pull to ground through an internal 250Ω equivalent resistance

The DAC can source 2mA over temprature. 

Using the built-in reference source, can the DAC provide a 5V output. What is the output current at the same time?

2mA