AnsweredAssumed Answered

AD9910 alternative output transformer

Question asked by mantow on Feb 13, 2012
Latest reply on Feb 14, 2012 by KennyG

Hi Engineerzone,


After successful experimentation with the AD9910 Evaluation Board I am now preparing my PCB design around the AD9910 DDS chip.

I have a question regarding the ADT1-1WT 1:1 transformer that is used at the DDS output on the evaluation board. Unfortunately this particular transformer is rated only to -20 C while my application demands operation down to -40 C.


My question is, therefore, how important is it to use a 1:1 transformer having a primary center tap that is grounded for my PCB design ? The reason I ask is that I have only been able to find an alternative Mini Circuits 50 Ohms 1:1 transformer, which *is* rated to -40 C, but it does *not* provide access to a primary center tap.


Many thanks in advance for your advice.