LMX2581

SNAS601G – AUGUST 2012 – REVISED SEPTEMBER 2014

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Table of Contents

8.5

Programming........................................................... 27

1

Features .................................................................. 1

8.6

Register Maps ......................................................... 29

2

Applications ........................................................... 1

9

Application and Implementation ........................ 43

3

Description ............................................................. 1

9.1

Application Information............................................ 43

4

Simplified Schematic............................................. 1

9.2

Typical Applications ................................................ 43

5

Revision History..................................................... 2

9.3

Do's and Don'ts ....................................................... 47

6

Pin Configuration and Functions ......................... 4

10

Power Supply Recommendations ..................... 47

7

Specifications......................................................... 6

10.1

Supply Recommendations .................................... 47

7.1

Absolute Maximum Ratings ..................................... 6

10.2

Regulator Output Pins........................................... 48

7.2

Handling Ratings....................................................... 6

11

Layout................................................................... 49

7.3

Recommended Operating Conditions ....................... 6

11.1

Layout Guidelines ................................................. 49

7.4

Thermal Information .................................................. 6

11.2

Layout Example .................................................... 49

7.5

Electrical Characteristics........................................... 7

12

Device and Documentation Support ................. 50

7.6

Timing Requirements, MICROWIRE Timing............. 9

12.1

Device Support .................................................... 50

7.7

Typical Characteristics ............................................ 10

12.2

Documentation Support ....................................... 50

8

Detailed Description ............................................ 12

12.3

Trademarks ........................................................... 50

8.1

Overview ................................................................. 12

12.4

Electrostatic Discharge Caution ............................ 50

8.2

Functional Block Diagram ....................................... 12

12.5

Glossary ................................................................ 50

8.3

Feature Description................................................. 13

13

Mechanical, Packaging, and Orderable

8.4

Device Functional Modes........................................ 26

Information ........................................................... 50

5 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision F (March 2014) to Revision G

Page

•

Added "over operating free-air temperature range (unless otherwise noted)" in Absolute Maximum Ratings and

Recommended Operating Conditions. ................................................................................................................................... 6

•

Added footnotes to HBM, CDM, and MM in Handling Ratings table...................................................................................... 6

•

Moved explanations of Typical Characteristics plots from plot footnotes to Feature Description section............................ 13

•

Moved Impact of Temperature on VCO Phase Noise into Feature Description section. ..................................................... 14

•

Added some description of modulator noise floor and Table 4. .......................................................................................... 16

•

Changed -89 to -83 in Table 11............................................................................................................................................ 24

•

Moved "Triggering Registers" to "Register Maps" section. .................................................................................................. 29

•

Changed order of subsections in Application and Implementation section.......................................................................... 43

•

Changed -- inverted color scheme of Figure 23, Figure 24, and Figure 25 to enhance readability..................................... 45

•

Added links for Device and Documentation Support . Added links to Application Note AN-1879 (SNAA062)

throughout the document...................................................................................................................................................... 50

Changes from Revision E (Novmeber 2013) to Revision F

Page

•

Added data sheet structure and organization. Added, updated, or renamed the following sections: Device

Information Table, Application and Implementation; Power Supply Recommendations; Layout; Device and

Documentation Support; Mechanical, Packaging, and Ordering Information......................................................................... 1

•

Changed Clarified that typical PLL noise metrics are measured at max charge pump gain. ............................................... 7

•

Added Typical Characteristics curves. ................................................................................................................................ 10

•

Changed Recommendation for OSC_FREQ bit for input frequencies > 64 MHz ............................................................... 34

•

Added Application and Implementation section with schematic........................................................................................... 43

•

Added Power Supply Recommendations ............................................................................................................................. 47

•

Added Layout ...................................................................................................................................................................... 49

2

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