TSX339

Application information

DocID028644 Rev 1

13/22

6

Application information

6.1

Input voltages

The output state is guaranteed as long as one input remains within the common mode

input voltage range (defined in the operating conditions table), and the other input remains

between -0.3 V and 16 V (meaning that one input can be driven above VCC+).

If one input voltage is beyond the range 0 V to 16 V, this input of the comparator should be

protected according to Figure 17.

If the input is lower than Vcc-, a significant current may go through the ESD diode. To

protect the circuit, this current must be limited to 10 mA by using the Rg+ or Rg- resistors.

If the input is bigger than 16 V, it has to be voltage limited. This is achieved using the D- or

D+ additional, external diodes. To protect these diodes, the current is limited using the Rg

resistor. D- and D+ diodes can be connected to another power supply with a maximum

value of 16 V. The device is designed to prevent phase reversal.

Figure 17: Additional, external, protection schematic