Reversing pins on a Balun

[Hawaslsh]

Hello,

I had a question concerning the use of a balun and if it was possible to reverse the pinout suggested by its datasheet. I am planning on using a very nice, wideband mixer (LTC5552) and its IF output is differential. I already have a balun made by Macom (MABA-011082) I was thinking of using on the mixers IF output. The pinout for both devices is above. However, when I was looking at the possible layout for a PCB the suggested pinout from the balun crisscrosses the IF output from the mixer (left picture below). I realize I can rotate he part and route a line underneath the balun itself. But that wouldn't be the best transmission line geometry in my opinion and matching the phase exactly would be a bit harder (right picture below).

Sadly I think the asnswer is no, but I wanted to ask others if it was possible to "reverse" the suggested balun pinout and still maintain the same operation / performance (picture below). Instead of using the dots on the primary and secondary coil as the positive end, I was thinking of using the non-dot end as the positive, and ground the primary dot, Any thoughts?

Thanks in advance,
Sami

 

[AMS012]

Hey Sami,

You can always interchange IF+ and IF-. They are just out of phase with each other. There is nothing like +ve and -ve here.

In that case, your routing becomes the simplest you can think of!

 

[FvM]

You can always interchange IF+ and IF-.

Yes, but not pin 1 and 2 of the unbalanced BALUN port as indicated in your schematic.

 

[Hawaslsh]

Yes, but not pin 1 and 2 of the unbalanced BALUN port as indicated in your schematic.

You can always interchange IF+ and IF-.

Thank all!
I will simply change the IF ports in the schematic and leave the Single ended side as recommended.

 

[BigBoss]

You can interchange the Differential Pins, doesn't care.
But take care the symmetry so connect the differential pins symmetrically on the layout so that tracks may have equal length.