Hello there new to the forums
I'm designing a precision threshold detector for a high voltage application. To be more precise the voltage I want to detect is 65 Volts.
My thoughts
I will use the LMP7300 with independent hysteresis control. I want negative hysteresis so I can give the voltage it’s time to drop but I as the voltage reaches 65 I want to detect it so no positive hysteresis.
The inv input will go to voltage ref, the high voltage will be fed to the non inv input via a resistor divider. Top resistor 309K and bottom 10K so at 65,331Volt the divider will give 2,048 Voltage.
The divider for the negative hysteresis will be 15K top and 1M bottom so I have 30mV hysteresis. Multiply that with 10/319 which is the ratio of the high voltage divider and I have 0,94 V of hysteresis on the high voltage signal
Are the above correct, what do you think?