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AD9957 DAC output balun selection

Question asked by williamchen on Jul 13, 2011
Latest reply on Jul 19, 2011 by DSB

Dear all,

 

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The reference design use a 75ohm balun (ADT1-1WT) on DAC output.

Question 1: Why use a 75 ohm balun, not a 50 ohm balun?

 

Question 2: 50 ohm resistor is connected to the input of the balun,

                  The purpose of these 50ohm resistror is for matching to 50 ohm?

 

Question 3: Can we use 50 ohm 1:1 balun (TC1-1-13M) and remove the 50 ohm resistors?

 

Thank you in advance.

 

Best Wishes,

William

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