TMUX136: very small AC signal application

Part Number:TMUX136

Hello Wittney,

I need to MUX analog sensor interface with capacitive sensor output  (<100 pF sensor capacitance)

with <10 mVpp peak signal <1mVpp typical signal and zero ground bias and current <100 uA.

In some applications the signal is typically limited by antiparallel grass clipping diodes to GND. 

Absolute rating allows signal up to -0.3 V signal. Recommended range is 0 to 3.3V. per datasheet and forum: 

e2e.ti.com/.../637888

TINA model of TMUX136 allows signal up to 500 mVpp without distortion with GND pin connected to GND and VCC to 5V.

Because schematics suggest JFET with pump voltage for the gate small negative signal should pass the switch without distortion 

and negative signal is limited by some protection diodes (ESD etc), which stays open for very small negative voltages?

Please let me know if I am right?

Best Regards, Vassili