Charge Injection

Q 

The amplitude of the charge injection corresponds with the specified values in
the datasheet. Only the sign is different than specified in the datasheet.

Figure 33 in the datasheet describes a "negative" injection with a falling edge
of Vin. We see a positive injection with a falling edge of Vin. Could it be
that the Figure 33 description is wrong?

 

A 

Charge injection is normally a positive glitch, so what you are measuring is
expected.
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