Questions about ADA4938-1 and ADL5562 for using ADC driver circuit of AD9648

Question

Hello, 
 
 My customer will use AD9648( ADC )and ADL5562 (ADC driver) in their product. 
 And they want to add additional amp. (ADA4938-1) for compensating Gain value at the frond-end of ADL5562. 
 Q1) Would you advice your opinions about using 2 op amps at the front-end of AD9648 (Please refer below concept picture.)? 
 
 Q2) At the front-end of AD9648 (ADC), is the above concept usable circuit? 
 
 Q3) Can you recommend other components or circuits for this case? 
 ( Amp with 5dB Gain + ADL5562 + AD9648) 
 1) Need additional 5dB Gain 
 2) Change single-ended signal to differential signals 
 3) Output signals should be met the input spec. of ADL5562. 
 
 Regards, 
 Se-woong

Gauzz · Accepted Answer

Hi Se-woong, Doing multi-stage input at front-end is pretty common especially when your driver doesn't have enough bandwidth when configured with gain. Gain splitting/using different driver with enough bandwidth is the right call here. May I know what frequency you are operating at? Regards, 
 Goz)

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Questions about ADA4938-1 and ADL5562 for using ADC driver circuit of AD9648