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LMX2572: Sub-Fractional Spurs

Intellectual 2470 points

Replies: 3

Views: 88

Part Number: LMX2572

Hi Team,

My customer is evaluating LMX2572 on their ES board, and they have a question about sub-fractional spurs.
When they evaluated the 2nd  ES board, sub-fractional spurs of LMX2572 became around 5dB higher than that of the 1st ES board.
They do not change application of LMX2572 and settings, they also use MASH_SEED with the same setting.
It is a general question,
Q1: Does the sub-fractional spurs vary by variation of LMX2572 characteristic, part to part, or lot to lot?

Thank you.

Best Regards,

Koshi Ninomiya