AMC1306M25: In case of input range between ±250mV and ±320mV

Hi all

Would you mind if we ask AMC1306M25?

<Question1>
In case of input range between ±250mV and ±320mV, how much will the output data code?
On the datasheet, there is the description;
"A differential input of 250 mV (for the AMC1306x25) or 50 mV (for the AMC1306x05) produces a stream of ones and zeros that are high 89.06% of the time.
 With 16 bits of resolution, that percentage ideally corresponds to the code 58368."
"A differential input of –250 mV (–50 mV for the AMC1306x05) produces a stream of ones and zeros that are high 10.94% of the time and ideally results in code 7168 with 16-bit resolution."
->We assume the followings;
Input range　                 Data code　　　　　
+250mV ～ +320mV      58368～65535
-250mV  ～ -320mV       7168～0
Is our recognition correct?

<Question2>
In relation to <Question1>, we have Figure51.

It seems that Dout saturated(65535 or 0) at +FS(+250mV) and -FS(-250mV).
So, this figure only shows the linearity, right?

Kind regards,

Hirotaka Matsumoto