What's the relationship between the current flowing through the Zener Diode? I simulated the following for various values of R, and the voltage drops quite a bit with small currents. The 1N750 has a Vz of 4.7V.
The only information related to it on the datasheet I could find was the following, however I'm not sure what curve I'm meant to be looking at:
So then, I simulated the circuit with a current source instead of R1:
- 10mA of current gave a voltage of 4.66V
- 0.45mA of current gave a voltage of 4.13V
This suggests it is the righter curve. However, then I simulated the circuit at 0.01mA (the bottom of the graphs). This gives a voltage of 2.65V, which suggests the left curve. Which is it (if either)?