I am trying to design a circuit using this LM4040-5 Voltage Precision Reference for my DAC8554, but I can't for the life of me figure out how to properly calculate the resistor value to be applied. Right now the LM4040-5V (5V reference) is giving me voltages ranging between 4.77v to 5.11v. Obviously not very precise!
This is the basic schematic for the LM4040 via its datasheet, as well as the formula they suggest for calculating the Resistor value:
So for my particular design, VS == +12v, VR == +5v, but where/how can I obtain the values for IL (load) and IQ (operating current)?