ADC32J45: ADC32J45 Input Questions.(Single-End)

Part Number:ADC32J45

Dears.

We are in the circuit design of ADC32J45.

We need a guide to design the input of the ADC32J45 as single-ended.

We are need to Balun and Impedance guide information.

Why are there two Baluns in EVM?

Can not you just use one Balun?

Thank you.