Other Parts Discussed in Thread: LMV393
Hi everybody,
I was using a LM393D as window detector in one of my design. When the voltage is between 1 and 2.8V, my output is 3.3V and when the input voltage is outside of these values, I got 0V. The output is wired to my microcontroller.
Sometimes, at startup, the output voltage is at 0V while my input voltage is between the limits. I just wait a few minutes, I reset the alarm, and the output voltage is right. I was looking for explanations about this problem, and I read on the TI website, that for 3V3 power supply, the LMV393 is better. So I change my LM393 with LMV393. But, on some cards, this one is working perfectly, and some other cards, I got a wrong output voltage.
If you have any advices to help me to understand this problem.
Please find below my design.
Best regards,
Fabrice Péden