ADL 5802 Mixer Broadband Matching

[guytoub]

Hi ,

I want to use this ADL 5802 Mixer but in the datasheet it says that we can use the IF output from Lf to 600MHz but it can be match externally to 3 Ghz .
i wanted to use it from 500 Mhz to 3GHz , how i can realise the broadband matching ?

if it not possible , how i can match this output for 2 ghz?

thanks

 

[FvM]

The datasheet mentions the necessity of additional matching components above 600 MHz but doesn't show circuit details or measured S parameters. Try to get the info from ADI or measure yourself.

 

[BigBoss]

The Output Impedance of the IC is approx. 240 Ohm. So, you may change this impedance to 50 Ohm by using

https://www.minicircuits.com/WebStore/dashboard.html?model=TC4-25%2B

The Impedance ratiuo is 4 then 240/4=60 Ohm. Some tweaks may pull the impedance better point.
Or, you can find wider bandwidth transformer.
For instance :

http://www.minirf.com/pdf/transformers/XFM-2501-4WHDS.pdf