I've downloaded and installed the model AD8205.cir and I'm not quite sure how accurate the model is. I noticed two deviations from the actual device:
Operating conditions:Vcc = 5VVfer1 = Vref2 = 0VRshunt = 0.5mR (for the sake of completeness)Simulator: LTSpice
1.The zezo current output voltage should be 50mV (max?) according to the datasheet and I measure 25mV on the actual IC. But The spice model outputs 97mV under that conditions. That's twice as much as mentioned in the datasheet.
2.If I start to increase the current through the shunt on the actual IC, the output start to rise only at 0.4A and above (that corresponds to 0.2mV between IN+ & IN-). In the spice model the output starts to rise immediatly when I start to increase the current.
Do I overlook something?
I'm getting the 97mV, even when directly putting a 0V voltage source in between +IN and -IN. I think this is spice model issue of the part and not related to any actual performance of the part.…
We released a new model for AD8205 for LTspice.
Update your LTspice model version by selecting Tools->Sync Release in the toolbar.
Where did you see 50 mV max??
The gain is 50V/V and the max offset is 2 mV, so 97 mV < 100mV/