[Ngspice-users] Warning: temperature adjusted grading coefficient too large

[Francis T. <frt...@gm...>]

Hi,

When running a circuit that includes the HCNR200 model, which can be 
found here 
(https://www.broadcom.com/products/optocouplers/industrial-plastic/specific-function/high-linearity-analog/hcnr200), 
ngspice gives the following warnings:

Warning: d.xu1.dpd2: temperature adjusted grading coefficient too large, 
limited to 0.9

Warning: d.xu1.dpd1: temperature adjusted grading coefficient too large, 
limited to 0.9

Note: I have also copied a "cleaned up" version of the model here: 
https://gist.github.com/auxym/6d68b6d72a54f150fb1d3921eb2d46ee

When using the same model in LTSpice for example, I do not get these 
warnings.

Thank you

Francis