AnsweredAssumed Answered

AD9910 impedance matching

Question asked by FreddyS on Dec 29, 2014
Latest reply on Jan 6, 2015 by KennyG

Dear supporter

I am using the AD9910 DDS.

My concern is the matching needed for 100Ω differential impedance of my circuit after the AD9910 DAC output.

  1. Can you please advise the most efficient (small as possible) way to match the DDS to 100Ω differential, over the 10-500MHz freq. range ?
  2. Currently, I am not using any kind of transformer at the output (see attached picture below). I use two resistors for matching.
    Can you please advice whether this concept is good? Is there any additional resistor/other values of the existing resistors that I should place/change for better performance ?

Thanks

Freddy  



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