electrohawk
Newbie level 4
Hello, I would like to design a 4-20mA sensor interface for my MCU. I know all i need is a 250 ohm resistor, an opamp and an A2D. However, I need to add protection such as reverse protection for the sensor and protections on the point where I am reading from the sensor. What do you think is the best way to to this? TVS on the 250 ohm and a normal diode on the DC input of the sensor? Please help as I am confused and can't find a suitable solution. Thank you!