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LTC2494 Datasheet Error

I am looking at the datasheet of LTC2494 (Rev E).

On figure 12 (page 28), it says that the formula for the common mode voltages is half of the difference between the input voltages.

Shouldn't it be half of the sum? (in+ + in-) / 2

Also, the formula for the average input current looks wrong too, shouldn't it be Vin(cm) / Req, since the equivalent resistor is 1/(fswitching*Csample) and fswitching is fsw/4 since there are 4 inputs.

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