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ADC32RF45: Full scale power for ADC32RF45

Part Number: ADC32RF45

Hi

The Vpp for the ADC32RF45 is mentioned as 1.35Vpp. With a 50 ohm system this comes to 6.586dBm.  I am also seeing a value of 65 ohms mentioned in page 6 as differential resistance at DC. If I use 65 ohm, the full scale power comes to 5.44dBm. Should I use 65 ohm or 50 ohm to calculate the full scale power in to the ADC?