Hello team,
As suggested we should use differential input configuration for ADC optimum performance. So we have to use single ended to differential ended conversion before ADC like RF transformer or ADC Driver.
In my application, Input frequency to ADC is 70MHz and Sampling rate 60 MSPS
As, I wanted to use AD9215 ADC above second nyquist zone, As suggested in datasheet page no-15, we should use RF Transformer for this application in order to achieve true performance of AD9215.
But before ADC I want to use VGA which will have differential output and i got application note for High dynamic range VGA AD8331 with ADC AD9215 interfacing ( AN-1529).
In application note AN-1529, RF transformer is not being used in the circuit (attached image). So i want to know can we use same for my application ( Input frequency to ADC is 70MHz and Sampling rate 60 MSPS ) ?
Also i want to know if i use same circuit interfacing (attached image) , does it will affect ADC performance ?
Thanks and Regards,
Deepak
