DAC8563: There is a problem with the schematic's 0-20mA current output. Could you please explain in detail how to design it? Thank

This appears to be the same question as the one found here:

 https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1619479/dac8563-schematic-review-for-dac8563-and-xtr300 

The schematics are exactly the same. In the previous post, Paul had found several things for the DAC8563:

• DAC8563 seems to be powered by 6V, which is the absolute maximum voltage of the device.  Generally that is not recommended, as it could be limiting the lifespan of the device.
• REF should have 150nF capacitance on it.
• /CLR should be connected to VDD if not used.  It should not be connected to GND.

If you have fixed these problems, you should post a more recent schematic. Also, you should check that the DAC is working. Is your DAC output going from 0V to 5V when you set the code through the full range? What are you getting for the DAC output?