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ADC32RF55: ADC32RF55 Schematic Review

Seongtaek Cho
Prodigy 195 points

Part Number: ADC32RF55
Other Parts Discussed in Thread: LMK04828, ADS54J40, TRF37D73, , LMK04832

ADC32RF55_LMK04828.pdf 

 

I previously used ADS54J40 and LMK04828.

The hardware structure is as follows:
LNA(TRF37D73) -> VGA(THS7530PWP) -> ADC(ADS54J40 + LMK04828) 
The LNA input frequency band is approximately 100MHz and 1G sampling was performed on the ADC.
 
In the new project, the LNA input frequency is around 200MHz to 300MHz and I want to do ADC and 3G sampling.
So I want to change only the ADC in the existing hardware structure to ADC32RF55.
 
The EV board of ADC32RF55 uses LMK04832, but is there any problem with using the existing LMK04828?
And I previously connected VCXO, 100MHz (CVPD-922-100.000) to LMK's oscin, but can I connect 122.88MHz for 3G sampling?
And can I use an oscillator like TI's LMK61A2 series instead of a VCXO?
 
I've attached the circuit diagram for the VGA-ADC-LMK. Could you please check if there are any problems with the circuit?
 
Best Regards
Cho