What scheme to take as a basis for the DAC?

Question

Do it yourself

Task: develop a block diagram of the device (DAC) with the initial data given in the table.

• Input signal: 12-bit binary code
  
• Output signal: 4 ... 20mA
  
• Load resistance Rl=0..2.5 kOhm
  
• Operating temperature range: -40..+50C
  
• Basic error: 0.025%; Additional temperature: 0.025%; linearity error: 0.025%
  

Answer 1

kursach :) read manuals.
resistive chain R-2R - 146% originality, no one will have such.