LMX2594: VCO calibration speed:The actual test was 68uS.The manual says it can reach 35uS

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Part Number: LMX2594

Hi,

When we tested the frequency hopping time of LMX2594 and LMX2572 phase-locked loop chips, the VCO calibration used Partial assist mode, with the output frequency hopping between 1.0g and 1.1g. The frequency hopping time of LMX2594 was 68uS, which could reach 35uS according to the manual.LMX2572 test we found that the actual FM time difference is quite large compared to the manual.

What do we need to improve? Thanks!

9 Replies