Hi, application team,
A customer has a question regarding the absolute maximum rating of the OPA4188 input terminal.
From the maximum rating in the data sheet, when +/- power supply is used, the maximum power supply voltage rating is ± 20V, and the input terminal rating is "+ power supply voltage + 0.5V" on the upper side and "-power supply voltage -0.5V" on the lower side.
Questions:
- Does this mean that if the power supply voltage is not supplied (= + /-0V) and the voltage is applied to the input terminal, the input terminal must always keep within 0V ± 0.5V?
- Or, Note (2) in absolute maximum rating table states that “Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5-V beyond the supply rails should be current-limited to 10 mA or less.”
If this protection diode current is kept within 10mA, is it okay to understand that the voltage rating (+/- 0.5V) of the input terminal is no longer a problem?
Best regards,
H.Someno