With the RF detector connected to the ADC, the output ADC codes versus detector input power can be examined. This power sweep was taken at 1GHz. Because of the signal scaling that was done between the RF detector and the ADC, almost all of the ADC’s input range is being used. Also the horizontal error curves suggest that the AD7466 ADC is not adding any temperature drift or non-linearity to the overall performance. As a matter of fact, there is probably a little bit of ratiometric cancellation going on here because both the RF detector’s output voltage and its voltage reference exhibit a very slight negative temperature drift. These two drift characteristics, while admittedly very slight, do track one another resulting in excellent overall temperature stability in the system.