LMX2531LQ1515E_14 datasheet(7/25 Pages) NSC

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LMX2531LQ1515E Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.

Part #	LMX2531LQ1515E

Description	Evaluation Board Operating Instructions

Download	25 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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7 / 25 page

LMX2531L Q 131 2E

E V A L U A TION

BO A RD

OPER A T ING

IN STRUCTIONS

Free-Running VCO Phase Noise (Internal Divide by 2 Enabled)

The plots to the left show the true phase noise capability of the

VCO. In order to take these plots, the E5052 phase nose

analyzer was used.

The method was to lock the PLL to the

proper frequency, then disable the EN_PLL, EN_PLLLDO1, and

EN_PLLLDO2 bits. The equipment needs to be able to track

the VCO phase noise to measure in this way, and one can not

let the VCO drift too far off in frequency. If this kind of equipment

is not available, the VCO phase noise can also be measured by

making a very narrow loop bandwidth filter.

When divide by 2 is enabled, the phase noise at lower offsets is

about 6 dB better. At high offsets, the overall phase noise

improvement may be lower because the divider is noise floor is

adding to the phase noise.

Manufacturer	Part #	Datasheet	Description
Texas Instruments	LMX2531LQ1515E/NOPB	1Mb / 48P	[Old version datasheet] High-Performance Frequency Synthesizer System

Manufacturer	Part #	Datasheet	Description
National Semiconductor ...	LMX2531LQ1415E	2Mb / 25P	Evaluation Board Operating Instructions
	LMX2531LQ1742	938Kb / 16P	Evaluation Board Operating Instructions
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	LMX2531LQ1146E	3Mb / 25P	Evaluation Board Operating Instructions
Texas Instruments	LMK01801	2Mb / 44P	[Old version datasheet] Dual Clock Divider Buffer Evaluation Board Operating Instructions
National Semiconductor ...	LMK3001	3Mb / 23P	Precision Clock Conditioner with Integrated VCO Evaluation Board Operating Instructions
ebm-papst	K1G200-AD65-04	1Mb / 9P	Operating instructions
ebm-papst	K3G200-BD64-04	428Kb / 9P	Operating instructions
Bosch Sensortec GmbH	TDA26	1Mb / 2P	Operating instructions
Maxim Integrated Produc...	DS1703K	250Kb / 11P	Operating Instructions 051503

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