AD9910: REFCLK termination 2

Document created by analog-archivist Employee on Feb 23, 2016Last modified by analog-archivist Employee on Feb 23, 2016
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igure 2 is three circuit options for LVDS termination. In the first circuit,
the 100 ohm resistor is after the capacitor. But in our AD9910 datasheet, the
100 ohm resistor is before the capacitor. Is this correct?


                               Figure 1


                              Figure 2

 

For the LVDS output driver, it’s OK to have the 100 ohms termination on the
right or left side of coupling capacitors. Note. when on the right side make
sure the capacitors that form a high pass filter don’t filter the fundamental
frequency. Typically, 0.1 uf to 0.01uf are fine.

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