Use an LM35
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reading the datasheet. Give me some time.Use an LM35
Isn't this like a thermometer. I mean it would read the ambient temperature but I want to use the thermistor embedded inside the IGBT. I think LM35 defeats my purpose.Use an LM35
I know the graph is logarithmic. I just want to monitor if the temperature goes beyond a certain point. So, the moment it goes beyond a certain frequency I need an alarm.Inside as in a Hybrid array like Mitsubishi's IGBT 1 Gigawatt switches.
Diodes are linear, Thermistors are not unless properly designed in a CC array,
Consider a signal diode then. just like CPU's do.
I didn't follow what you meant by v to f and f to v.Sorry I lost track of your design for these measurements.
I cant see the scope of the project and why you chose v to f then f to v to detect an alarm condition. Certain EMI issues of ingress must be corrected.
The concern with analog (voltage) is that if any IGBTs blow. Previously, I was using a voltage bridge. How do I isolate and make sure they don't blow other IGBTs aor PLC.I cant see your system design, but low impedance analog might be easier and faster to commutate than a thermistor controlled frequency (V to F or rather R to F)