For **AD9253-105** converter , can I consider the given differential input resistance for matching with a 50 ohm signal source? Given resistance value is * 5.2 K ohm*, if not what are the factors to be considered ?

My sampling rate is 102.4 MHz and input bandwidth of 40 MHz centered at 76.8 MHz for my application.

Hi Balaji,

Thank you for your interest in AD9253. I apologize for the slow response.

To match to a 50Ohm signal source you will need to place external termination resistor(s) on your board close to the ADC inputs. The inputs of the AD9253 are relatively high impedance compared to 50Ohms. 50Ohms in parallel with 5.2kOhms is very close to 50Ohms, so the external resistors will have the greatest influence on the termination value.

Thank you.

Doug