LMK04828 datasheet(2/113 Pages) TI1

2 / 113 page

LMK04821, LMK04826, LMK04828

SNAS605AR – MARCH 2013 – REVISED DECEMBER 2015

www.ti.com

Table of Contents

9.3

Feature Description................................................. 36

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

9.4

Device Functional Modes........................................ 46

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

9.5

Programming........................................................... 49

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

9.6

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

9.7

Device Register Descriptions .................................. 54

Device Comparison Table..................................... 6

Applications and Implementation...................... 95

5.1

Device Configuration Information.............................. 6

10.1

Application Information.......................................... 95

Pin Configuration and Functions ......................... 7

10.2

Typical Applications .............................................. 95

Specifications......................................................... 9

10.3

Do's and Don'ts ................................................... 101

7.1

Absolute Maximum Ratings ...................................... 9

Power Supply Recommendations ................... 102

7.2

ESD Ratings.............................................................. 9

11.1

Current Consumption / Power Dissipation

7.3

Recommended Operating Conditions ....................... 9

Calculations............................................................ 102

7.4

Thermal Information .................................................. 9

Layout................................................................. 103

7.5

Electrical Characteristics......................................... 10

12.1

Layout Guidelines ............................................... 103

7.6

SPI Interface Timing ............................................... 23

12.2

Layout Example .................................................. 104

7.7

Typical Characteristics – Clock Output AC

Device and Documentation Support ............... 105

Characteristics ......................................................... 24

13.1

Device Support .................................................. 105

Parameter Measurement Information ................ 26

13.2

Related Links ...................................................... 105

8.1

Charge Pump Current Specification Definitions...... 26

13.3

Trademarks ......................................................... 105

8.2

Differential Voltage Measurement Terminology ..... 27

13.4

Electrostatic Discharge Caution .......................... 105

Detailed Description ............................................ 28

13.5

Glossary .............................................................. 105

9.1

Overview ................................................................. 28

Mechanical, Packaging, and Orderable

9.2

Functional Block Diagram ....................................... 32

Information ......................................................... 105

4 Revision History

Changes from Revision AQ (August 2014) to Revision AR

Page

•

Added Support for 105°C thermal pad temperature .............................................................................................................. 1

•

Changed from I/O to I for pin 6 in Pin Functions table .......................................................................................................... 7

•

Deleted programmable status pin in Description column for pin 6 in Pin Functions table. .................................................... 7

•

Changed from No connection to Do not connect for pins 7, 8, 9 in Pin Functions table ...................................................... 7

•

Changed to Reference Clck Input Port 1 for PLL 1 for Pins 34, 35 in Pin Functions ........................................................... 8

•

Added Reference Clock Input Port 2 for PLL1 for pins 40, 41 in Pin Functions ................................................................... 8

•

Added ESD Ratings................................................................................................................................................................ 9

•

Added PCB temperature in Recommended Operating Conditions ........................................................................................ 9

•

Added Digital Input Timing in Electrical Characteristics ...................................................................................................... 22

•

Changed Detailed block diagrams for LMK04821 and LMK04826/8 .................................................................................. 32

•

Added 6 to DCLKout0 sequence and 7 to SDCLKout1 sequence in Figure 12................................................................... 34

•

Added 6 to DCLKout0 sequence and 7 to SDCLKout1 sequence in Figure 13................................................................... 35

•

Added For each SDCLKoutY being used in SYNC/SYSREF............................................................................................... 36

•

Deleted "SDCLKoutY_PD as required per output. " in Table 1............................................................................................ 36

•

Added footnote starting SDCLKoutY_PD = 0 as... in Table 1 ............................................................................................. 36

•

Added SDCLKout1_PD = 0, SDCLKout3_PD = 0 in Setup of SYSREF Example............................................................... 37

•

Changed DLD_HOLD_CNT to HOLDOVER_DLD_CNT in Holdover Mode - Automatic Exit of Holdover ......................... 45

•

Changed Recommended Programming Sequence ............................................................................................................. 49

•

Added 0x171/0x172 to Register Map .................................................................................................................................. 53

•

Added LMK04821 register setting ....................................................................................................................................... 55

•

Revised Register 0x143 table............................................................................................................................................... 67

•

Added fixed register setting for 0x171.................................................................................................................................. 68

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