3/5

AN820 APPLICATION NOTE

Figure 4. Input / Output protection by diode array circuit of the DA series

PROTECTION AND FILTERING

The circuit of Figure 5 assumes both overvoltage protection and filtering functions. The protection is car-

ried out by the clamping device while the filtering is made by coupling resistor R and the parasitic capac-

itance of the clamping device.

Figure 5. Input / Output protection and filtering

PROTECTION SUMMARY

The input/output protection and even the filtering can be carried out by the ESDA, ITA and DA protector

ages, these devices offer both space saving and layout optimization.

INPUT

or

OUTPUT

µC

+V

+V

SENSOR

µC INPUT

R

R