I've been using different AD DDS Chips for a long time now. However, during the last days some questions about the 100 Ohm diff to 50 ohm SE matching popped up.
The EVAL Boards are equipped with TC1-1-13M+ Baluns. From what I heard, these Baluns are 1:1 Transformers.
The question now ist:
Why is the 100 Ohm diff Impedance from the AD9914 matched to 50 OHM SE by a 1:1 Balun? Up to now I would have chosen 2:1 Balun, since a 1:1 balun transforms 100 ohm (diff) to 100 ohm (se).
Where am I going wrong? Please help me understand.