LMK04821
,
LMK04826
,
LMK04828
SNAS605AR –MARCH 2013–REVISED DECEMBER 2015
www.ti.com
Table of Contents
9.3 Feature Description................................................. 36
1 Features.................................................................. 1
9.4 Device Functional Modes........................................ 46
2 Applications ........................................................... 1
9.5 Programming........................................................... 49
3 Description ............................................................. 1
9.6 Register Maps ........................................................ 50
4 Revision History..................................................... 2
9.7 Device Register Descriptions.................................. 54
5 Device Comparison Table..................................... 6
10 Applications and Implementation...................... 95
5.1 Device Configuration Information.............................. 6
10.1 Application Information.......................................... 95
6 Pin Configuration and Functions......................... 7
10.2 Typical Applications .............................................. 95
7 Specifications......................................................... 9
10.3 Do's and Don'ts................................................... 101
7.1 Absolute Maximum Ratings ...................................... 9
11 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
12 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
13 Device and Documentation Support ............... 105
Characteristics ......................................................... 24
13.1 Device Support .................................................. 105
8 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
9 Detailed Description............................................ 28
13.5 Glossary.............................................................. 105
9.1 Overview ................................................................. 28
14 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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Product Folder Links: LMK04821 LMK04826 LMK04828
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