In the manuala is stated that the maximum voltage on any pin is Vcc+0,5. This is clear.
But i am wondering if ther is protection diode inside the controller.
I mean that if ther is protection diode inside, that will limit the voltage level to vcc+0,5.
If this is the case, what is the maximum current that diode can manage.
The background to the question is as follow;
I am measuring some signals with the ADC and the signal is amplified with external operational amplifier (opa). The opa is powered with +10V power supply.
Can i just simply put some series resistance to output of opa and use that resistanse as current
limitter. Or if i have to supply opa with Vcc, to limit the output voltage to Vcc.
If i will power the opa with Vcc i have to use rail-to-rail opa.
- juha -