1. The following circuit of opa2333 is shown in the figure. Is R7 required? Why?Are other operational amplifiers needed?
2. Can internal clamping diodes be used? In case of over-voltage, the clamping diode current is 0.7ma, less than 1mA in the manual. Is it OK?
3.Does the output of the op amp need a resistor in parallel to ground to ensure that the op amp has some load? If R12 in the figure is needed, how big is the resistor?