7.3.1 Input Stage

The input stage features two Schmitt-triggers at the pins IN+ and IN– to reduce sensitivity to noise on the inputs. IN+ signal and the inverted IN– signal are both sent to an AND gate. IN+ is connected with a pull-down resistor while IN– is connected with a pull-up resistor to prevent unintended turnon. The output signal will follow the difference between IN+ and IN–. Both IN+ and IN– are single ended inputs, and these two pins cannot be used as a differential input pair.