AD9558 datasheet(2/104 Pages) AD

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AD9558

Data Sheet

Rev. A | Page 2 of 104

TABLE OF CONTENTS

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

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

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 3

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

Supply Voltage............................................................................... 4

Supply Current.............................................................................. 4

Power Dissipation......................................................................... 5

Logic Inputs (SYNC, RESET, PINCONTROL, M7 to M0) .... 5

Logic Outputs (M7 to M0, IRQ) ................................................ 6

System Clock Inputs (XOA, XOB) ............................................. 6

Reference Inputs ........................................................................... 7

Reference Monitors ...................................................................... 8

Reference Switchover Specifications.......................................... 8

Distribution Clock Outputs ........................................................ 9

Time Duration of Digital Functions ........................................ 10

Digital PLL .................................................................................. 11

Digital PLL Lock Detection ...................................................... 11

Holdover Specifications............................................................. 11

Serial Port Specifications—SPI Mode...................................... 12

Serial Port Specifications—I2C Mode ...................................... 13

Jitter Generation ......................................................................... 13

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

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

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

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

Input/Output Termination Recommendations .......................... 25

Getting Started ................................................................................ 26

Chip Power Monitor and Startup............................................. 26

Multifunction Pins at Reset/Power-Up ................................... 26

Device Register Programming When Using a Register

Setup File ..................................................................................... 26

Theory of Operation ...................................................................... 29

Overview...................................................................................... 29

Reference Clock Inputs.............................................................. 30

Reference Monitors .................................................................... 30

Reference Profiles ....................................................................... 30

Reference Switchover ................................................................. 30

Digital PLL (DPLL) Core .......................................................... 31

Loop Control State Machine..................................................... 34

System Clock (SYSCLK)................................................................ 35

System Clock Inputs................................................................... 35

System Clock Multiplier ............................................................ 35

Output PLL (APLL) ....................................................................... 37

Clock Distribution.......................................................................... 38

Clock Dividers ............................................................................ 38

Output Power-Down ................................................................. 38

Output Enable............................................................................. 38

Output Mode .............................................................................. 38

Clock Distribution Synchronization........................................ 38

Frame Synchronization.................................................................. 40

Reference Configuration in Frame Synchronization Mode . 40

Clock Outputs in Frame Synchronization Mode ................... 40

Control Registers for Frame Synchronization Mode............. 40

Level Sensitive Mode and One-Shot Mode............................. 40

Channel Divider 3/OUT5 Programming in Frame

Synchronization Mode .............................................................. 41

Status and Control.......................................................................... 42

Multifunction Pins (M7 to M0) ............................................... 42

Watchdog Timer......................................................................... 43

EEPROM ..................................................................................... 43

Serial Control Port ......................................................................... 49

SPI/I2C Port Selection................................................................ 49

SPI Serial Port Operation .......................................................... 49

I2C Serial Port Operation .......................................................... 53

Programming the I/O Registers ................................................... 56

Buffered/Active Registers.......................................................... 56

Autoclear Registers..................................................................... 56

Thermal Performance.................................................................... 57

Power Supply Partitions................................................................. 58

Recommended Configuration for 3.3 V Switching Supply .. 58

Configuration for 1.8 V Supply ................................................ 58

Pin Program Function Description ............................................. 59

Overview of On-Chip ROM Features ..................................... 59

Hard Pin Programming Mode.................................................. 60

Soft Pin Programming Overview............................................. 61

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