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TINA/Spice/TLC551: Resolve NP and NZ parameters using correct VT definition.

Part Number: TLC551
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models


I'm attempting to use your tlc551 spice model in LTSPICE, and am getting errors stating:  "Can't resolve .PARAM NP = {0.3/(VT*LOG(1 + 5.0M/ISP))}" and "Can't resolve .PARAM NZ = {0.3/(VT*LOG(1 + 5.0M/ISZ))}". The issue appears to be the parameter "VT", which is not defined anywhere in the code, but is used.

I can get the simulation to run, but it requires me to include the statement, ".PARAM Vt={any number}" before any definition of NP or NZ. I don't know what "Vt" is supposed to do so I have no idea what the effect is, but it can't be good.

Is there a way to get the simulation to run without arbitrarily fixing Vt? What does Vt represent?