I want to use the same clock architecture in TIDA-01023 to achcieve JESD204B-synchronized clocks, but the output clock frequency is 10GHz.
Which RF synthesizer do you recommend?
LMX2594 already support >10 GHz RF output.
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In reply to Noel Fung:
Thanks for your reply.
Is there some test result about the clock skew when the output clock frequency is 10GHz?
In reply to xiao peng ma:
What clock skew you are talking about? Between the reference clock and 10GHz output of the synthesizer?
The clock skew between the 10GHz output of the two LMX2594.
That depends on the configuration, in idea case (e.g. Reference clock = 100MHz, RF output = 10GHz), the skew between two LMX2594 could be less than 1ns.
Can LMX2594 SYNC pin be used to achieve better clock skew?
The clock skew of TIDA-01023 is only 8ps.
Here is another question.
If Reference clock = 100MHz, RF output = 10GHz, looking at LMX2594 datasheet Figure 27, SYNC category should be Category 1 - SYNC Mode Not required at all , No limitations on fOSC.
What does "SYNC Mode Not required at all" mean?
That means you don't need to enable the VCO_PHASE_SYNC bit.
Sorry, maybe there are some misunderstandings about the 7.3.10 Phase Synchronization.
From 184.108.40.206 General Concept, I can assume that two LMX2594 can be synchronized by SYNC pin.
But below Figure 25, does "When the SYNC feature is enabled" mean "VCO_PHASE_SYNC = 1" ?
From 220.127.116.11 Categories of Applications for SYNC, I can assume that the usage of SYNC feature in TIDA-01023 is timing critical and SYNC pin must be used.
From Figure 27, what is the difference between "SYNC Required" and "SYNC Mode Required" ?
From 18.104.22.168 Procedure for Using SYNC, does "This procedure must be used to put the device in SYNC mode" mean that if I want to use SYNC feature, LMX2594 must be in SYNC mode(VCO_PHASE_SYNC = 1)?
From 22.214.171.124 SYNC Input Pin, I can assume that SYNC pin and VCO_PHASE_SYNC = 1 should be used together.
Sorry for so many questions.
In the bottom Cat.1 scenario, VCO_PHASE_SYNC is not necessary equal to 1. After normal programming, all the devices are in sync.
In the higher level Cat.1 scenario requires VCO_PHASE_SYNC = 1.
In Cat. 2, VCO_PHASE_SYNC is not necessary equal to 1. After programming all devices, send a SYNC pulse to the SYNC pin to get every device synced.
In Cat. 3, program the devices with VCO_PHASE_SYNC = 1, send a time-controlled SYNC pulse to synchronize all the devices.
Thank you very much.
So you mean that in the bottom Cat.1 scenario, VCO_PHASE_SYNC = 1 and SYNC pin can also still be used to achieve phase synchronization like TIDA-01023?
Are there some test results about the clock skew between the RF output of the two LMX2594 based on TIDA-01023 when the output frequency is 10GHz?
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