The spec sheet for the ADL5331 contains little information on the evaluation board. I need to know, is it configured so that the output impedance of the board is 50 Ohm?
The output of the amplifier itself is 20 ohm differential. On the eval board, that 20 ohm differential outputs are connected to the inputs of a 1:1 impedance ratio balun, then one output port of that same balun is connected to the output connector and the other is grounded. Datasheet plots that reflects the typical performance of the device are also generated with the same configuration.
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