Hello,
I'm developing a analog input (using module ADC of my uController) and i've getting problem with thermal stability when the temperature rise. Nawadays I'm using a schottky diode to +VCC (that its 2,5V - voltage reference of my ADC) to clamp between 2,7V ... 2,8V when the user put a higher voltage (that the circuit doesnt support).
In my mind, there are two possibilities: using schottky (to 2,5V) or zener diode (to GND), however both might not looks stable when temperature rise because reverse/leakage current increase. Anyone could help me with this problem?
Thank you.
B.R.
I'm developing a analog input (using module ADC of my uController) and i've getting problem with thermal stability when the temperature rise. Nawadays I'm using a schottky diode to +VCC (that its 2,5V - voltage reference of my ADC) to clamp between 2,7V ... 2,8V when the user put a higher voltage (that the circuit doesnt support).
In my mind, there are two possibilities: using schottky (to 2,5V) or zener diode (to GND), however both might not looks stable when temperature rise because reverse/leakage current increase. Anyone could help me with this problem?
Thank you.
B.R.