I need to choose the correct Balun(Balanced to unbalanced) component for converting differential to single ended signal. I can able to find only 50 to 100 ohms impedance balun. But I need 100 to 50 ohms.
ie, Differential to single ended(100/50)
You mentioned that you can find 50 to 100 ohms balun (single ended to differential) but you cannot find 100 to 50 ohms (differential to single ended).
Just to let you know that any 50 to 100 ohms balun (single ended to differential) can be used in reverse, as 100 to 50 ohms (differential to single ended).