Hi Circuiteers.
I want to measure a low impedance voltage source using the ADC when the source is in the ~1V range. However it can also go up to ~50V so I need to protect the PIC. Would a ~100k resistor suffice? This would limit the current to ~0.5mA at 50V but will PIC24FV tolerate this? The datasheet specifies the limit in voltage space ie. Vdd+0.3V, rather than current space.
I'm not worried about a little imprecision due to the leakage current through the large resistor. The RC...
Protecting PIC24FV input pins from excessive voltage
I want to measure a low impedance voltage source using the ADC when the source is in the ~1V range. However it can also go up to ~50V so I need to protect the PIC. Would a ~100k resistor suffice? This would limit the current to ~0.5mA at 50V but will PIC24FV tolerate this? The datasheet specifies the limit in voltage space ie. Vdd+0.3V, rather than current space.
I'm not worried about a little imprecision due to the leakage current through the large resistor. The RC...
Protecting PIC24FV input pins from excessive voltage