LMX2581EVM Datasheet, PDF (38/46 Pages) Texas Instruments – Input and Output Connector Description

Measured Performance Data
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Figure 51 is this same LMK04816 + LMX2581 board output at 2.7 GHz. This uses a 100 MHz phase
detector and a wider loop bandwidth. Comparing to the plot in Section 5.1. Section 5.1, there is a
significant improvement in close-in phase noise due mainly to the wider loop bandwidth
The noise floor is a little worse because it is slightly worse at the highest output power setting that was 45
in this case.
This is more typical of a loop bandwidth that one would use for a clocking application or something with
wider channel spacing.
Figure 51.
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LMX2581EVM User's Guide
SNAU136C – November 2012 – Revised November 2013
Copyright © 2012–2013, Texas Instruments Incorporated
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