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DDC112: ADC to Voltage conversion

Part Number: DDC112
Other Parts Discussed in Thread: IVC102

Hello, I'm having some confusion regarding the built-in offset that I'd like to get cleared up. I know it factors into the voltage conversion, but does it make it either of the following?

V = (Counts-Offset)*Scaling

Where

Offset = 2^12

Scaling = 4.096/((2^20-1)

OR

V = (Counts-Offset)*Scaling

Where

Offset = 2^12

Scaling = 4.096/((2^20-1-2^12)

Or are they both incorrect, and the voltage is determined by some other method?