OPA333: General question about Abso-spec

Hi Team,

I have a general question about Abso-spec of OPAMP.

I took below picture from OPA333 abso-spec.

my question is about Signal input terminals(SIT) voltage, SIT current and (2).

A: SIT voltage is - 0.3V to (V+) + 0.3V

B: SIT current is -1mA to 1mA

C: (2) input terminals are diode-clamped to the power-supply rails. input signals that can swing more than 0.3V beyond the supply rails should be current limited to 10mA or less.

My understanding for these are

B is applied when SIT voltage is within -0.3V to (V+) + 0.3V.

if SIT voltage is beyond -0.3V/ (V+) + 0.3V,  spec of B(-1mA to 1mA) no longer valid. Instead of B, C will be applied and then limit input terminals current within 10mA or less.

However, I'm still confusing that if clamp diode is activated, i think common diodes don't have such current limit function so no way to limit by diode itself.

How does OPAMP achieve that current limit?

using additional current limit block or someting like CRD(current regulative diode)?

thanks,

regards,

kai