HI
As per given ADC input equivalent circuit in the given below link for 1GHz, we simulated the circuit along with impedance matching circuit which is refereed from ADC16DV160 evaluation board schematic.
https://e2e.ti.com/support/data_converters/high_speed_data_converters/f/68/p/363442/1277594#1277594
ADC Part : ADC16DV160
Input frequency range is 1000 to 1100 Mhz.
Return loss is varied from -8.570 to -7.700dB (refer simulation result)
Impedance range is varied from 76 to 105 ohm.(refer simulation result)
Questions:
1. Pls confirm the given ADC input equivalent circuit is recommended for our operating frequency.
2. Kindly recommend the impedance matching circuit for 50 ohm matching and to meet the return loss below -15dB.
Note: find the attached schematic and simulation result for your reference.
ADC16DV160 Impedance match simulation- Results.pdfADC16DV160 Impedance match simulation- schematic.pdf