AD9512 datasheet(2/48 Pages) AD

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AD9512

Rev. A | Page 2 of 48

TABLE OF CONTENTS

Specifications..................................................................................... 4

Clock Inputs .................................................................................. 4

Clock Outputs ............................................................................... 4

Timing Characteristics ................................................................ 5

Clock Output Phase Noise .......................................................... 7

Clock Output Additive Time Jitter........................................... 10

Serial Control Port ..................................................................... 12

FUNCTION Pin ......................................................................... 13

SYNC Status Pin ......................................................................... 13

Power............................................................................................ 14

Timing Diagrams............................................................................ 15

Absolute Maximum Ratings.......................................................... 16

Thermal Characteristics ............................................................ 16

ESD Caution................................................................................ 16

Pin Configuration and Function Descriptions........................... 17

Terminology .................................................................................... 19

Typical Performance Characteristics ........................................... 20

Functional Description .................................................................. 24

Overall.......................................................................................... 24

FUNCTION Pin ......................................................................... 24

RESETB: 58h<6:5> = 00b (Default)..................................... 24

SYNCB: 58h<6:5> = 01b ....................................................... 24

PDB: 58h<6:5> = 11b............................................................. 24

DSYNC and DSYNCB Pins....................................................... 24

Clock Inputs ................................................................................ 24

Dividers........................................................................................ 25

Setting the Divide Ratio ........................................................ 25

Setting the Duty Cycle ........................................................... 25

Divider Phase Offset .............................................................. 29

Delay Block.................................................................................. 30

Calculating the Delay............................................................. 30

Outputs ........................................................................................ 30

Power-Down Modes .................................................................. 31

Chip Power-Down or Sleep Mode—PDB........................... 31

Distribution Power-Down .................................................... 31

Individual Clock Output Power-Down............................... 31

Individual Circuit Block Power-Down................................ 31

Reset Modes ................................................................................ 31

Power-On Reset—Start-Up Conditions when

VS is Applied........................................................................... 31

Asynchronous Reset via the FUNCTION Pin ................... 31

Soft Reset via the Serial Port................................................. 31

Single-Chip Synchronization.................................................... 32

SYNCB—Hardware SYNC ................................................... 32

Soft SYNC—Register 58h<2>............................................... 32

Multichip Synchronization ....................................................... 32

Serial Control Port ......................................................................... 33

Serial Control Port Pin Descriptions....................................... 33

General Operation of Serial Control Port............................... 33

Framing a Communication Cycle with CSB ...................... 33

Communication Cycle—Instruction Plus Data ................. 33

Write ........................................................................................ 33

Read ......................................................................................... 34

The Instruction Word (16 Bits) ................................................ 34

MSB/LSB First Transfers ........................................................... 34

Summary Table ........................................................................... 37

Power Supply................................................................................... 43

Power Management ................................................................... 43

Applications..................................................................................... 44

Using the AD9512 Outputs for ADC Clock Applications.... 44

CMOS Clock Distribution ........................................................ 44

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