AD9557(RevA) 데이터 시트보기 (PDF) - Analog Devices

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AD9557
(Rev.:RevA)

Dual Input Multiservice Line Card Adaptive Clock Translator

Analog Devices 

AD9557

Data Sheet

TABLE OF CONTENTS

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

Loop Control State Machine..................................................... 32

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

System Clock (SYSCLK)................................................................ 33

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

System Clock Inputs................................................................... 33

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

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

System Clock Multiplier ............................................................ 33

Output PLL (APLL) ....................................................................... 35

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

Clock Distribution.......................................................................... 36

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

Clock Dividers ............................................................................ 36

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

Output Power-Down ................................................................. 36

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

Output Enable............................................................................. 36

Logic Inputs (RESET, SYNC, PINCONTROL, M3 to M0) .... 5

Logic Outputs (M3 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 ........................................... 19

Input/Output Termination Recommendations .......................... 24

Getting Started ................................................................................ 25

Chip Power Monitor and Startup............................................. 25

Multifunction Pins at Reset/Power-Up ................................... 25

Device Register Programming Using a Register Setup File.. 25

Register Programming Overview............................................. 25

Theory of Operation ...................................................................... 28

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

Reference Clock Inputs.............................................................. 29

Reference Monitors .................................................................... 29

Reference Profiles ....................................................................... 29

Reference Switchover ................................................................. 29

Digital PLL (DPLL) Core .......................................................... 30

Output Mode .............................................................................. 36

Clock Distribution Synchronization........................................ 36

Status and Control.......................................................................... 37

Multifunction Pins (M3 to M0) ............................................... 37

IRQ Pin ........................................................................................ 37

Watchdog Timer......................................................................... 38

EEPROM ..................................................................................... 38

Serial Control Port ......................................................................... 44

SPI/I2C Port Selection................................................................ 44

SPI Serial Port Operation.......................................................... 44

I2C Serial Port Operation .......................................................... 48

Programming the I/O Registers ................................................... 51

Buffered/Active Registers.......................................................... 51

Autoclear Registers..................................................................... 51

Register Access Restrictions...................................................... 51

Thermal Performance.................................................................... 52

Power Supply Partitions................................................................. 53

Recommended Configuration for 3.3 V Switching Supply .. 53

Configuration for 1.8 V Supply ................................................ 53

Pin Program Function Description ............................................. 54

Overview of On-Chip ROM Features ..................................... 54

Hard Pin Programming Mode.................................................. 55

Soft Pin Programming Mode Overview ................................. 55

Register Map ................................................................................... 56

Register Map Bit Descriptions ...................................................... 65

Serial Port Configuration (Register 0x0000 to

Register 0x0005) ......................................................................... 65

Silicon Revision (Register 0x000A) ......................................... 65

Clock Part Serial ID (Register 0x000C to

Register 0x000D) ........................................................................ 65

System Clock (Register 0x0100 to Register 0x0108) ............. 66

Rev. A | Page 2 of 92

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