Part Number: LMK04828
Other Parts Discussed in Thread: DAC38RF84
Hi Experts,
Seeking your assistance on this query:
We have programmed the LMK04828 SDCLKOUT3 output as a LVPECL output and connected it to the DAC38RF84 SYSREF input using the resistor network below (R1208 & R1209 not fitted). Is this a valid configuration with compatible logic levels and if so, is it referenced in an application note.
Thank you.
Regards,
Archie A.
Hello Archie,
I would recommend you use another termination for the LVPECL outputs you have set up. In the data sheet on p. 105, you can find the information regarding how to set-up and LVPECL output. I have also included that section in a screenshot below.
As shown in the image above, one resistor that is between 120 Ω and 240 Ω from the LMK04828 SDCLKoutY to GND should be enough (no need for a voltage division set-up). Also, AC-coupling capacitors are recommended to the load to avoid bias mismatching. Hope this helps!
Good Luck,
Andrea
