Q12. A 6-bit R-2R ladder DAC has either 0 or 5V at each of its input pins (for binary "0" and "1", respectively). e) If you want the output voltage to span 0 to 10V, what do you need to add at the output of the DAC? f) What is the output impedance of the DAC? If a load resistor, 10R is connected at the output of the DAC, what is the voltage across it when the input is B111111? If you want the DAC's output not to be affected by the load resistor, what can you do