The ADC32RF8x analog inputs include an internal, differential clamp for overvoltage protection. As shown in Figure 8-6 and Figure 8-7, the clamp triggers for any input signals at approximately 600 mV above the input common-mode voltage, effectively limiting the maximum input signal to approximately 2.4 V_PP.

When the clamp circuit conducts, the maximum differential current flowing through the circuit (via input pins) must be limited to 20 mA.

Figure 8-6 Clamp Circuit in the ADC32RF8x

Figure 8-7 Clamp Response Timing Diagram