AD9548BCPZ datasheet(2/111 Pages) AD

2 / 111 page

AD9548

Data Sheet

Rev. G | Page 2 of 111

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......................................................................... 4

Logic Inputs (M7 to M0, RESET, TDI, TCLK, TMS) .............. 5

Logic Outputs (M7 to M0, IRQ, TDO) ..................................... 5

System Clock Inputs (SYSCLKP/SYSCLKN) ........................... 5

Distribution Clock Inputs (CLKINP/CLKINN) ...................... 6

Reference Inputs (REFA/REFAA to REFD/REFDD) .............. 7

Reference Monitors ...................................................................... 7

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

Distribution Clock Outputs (OUT0 to OUT3) ........................ 8

DAC Output Characteristics (DACOUTP/DACOUTN) ....... 9

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

Digital PLL .................................................................................. 10

Digital PLL Lock Detection ...................................................... 10

Holdover Specifications............................................................. 10

Serial Port Specifications—SPI Mode...................................... 11

Serial Port Specifications—I2C Mode ...................................... 11

Jitter Generation ......................................................................... 12

Absolute Maximum Ratings.......................................................... 14

ESD Caution................................................................................ 14

Pin Configuration and Function Descriptions........................... 15

Typical Performance Characteristics ........................................... 18

Input/Output Termination Recommendations .......................... 23

Getting Started ................................................................................ 24

Power-On Reset .......................................................................... 24

Initial M0 to M7 Pin Programming......................................... 24

Device Register Programming.................................................. 24

Theory of Operation ...................................................................... 26

Overview...................................................................................... 26

Reference Clock Inputs.............................................................. 27

Reference Monitors .................................................................... 27

Reference Profiles ....................................................................... 28

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

Digital PLL (DPLL) Core .......................................................... 32

Direct Digital Synthesizer ......................................................... 34

Tuning Word Processing ........................................................... 35

Loop Control State Machine..................................................... 36

System Clock Inputs................................................................... 37

SYSCLK PLL Multiplier............................................................. 38

Clock Distribution ..................................................................... 40

Status and Control.......................................................................... 44

Multifunction Pins (M0 to M7) ............................................... 44

IRQ Pin ........................................................................................ 45

Watchdog Timer......................................................................... 46

EEPROM ..................................................................................... 46

Serial Control Port ......................................................................... 51

SPI/I2C Port Selection................................................................ 51

SPI Serial Port Operation.......................................................... 51

I2C Serial Port Operation .......................................................... 56

Input/Output Programming Registers ........................................ 59

Buffered/Active Registers.......................................................... 59

Autoclear Registers ...................................................................... 59

Serial Port Configuration (Register 0x0000 to

System Clock (Register 0x0100 to Register 0x0108) ............. 71

General Configuration (Register 0x0200 to Register 0x0214) .. 72

DPLL Configuration (Register 0x0300 to Register 0x031B) 75

Clock Distribution Output Configuration (Register 0x0400 to

Reference Input Configuration (Register 0x0500 to

Profile Registers (Register 0x0600 to Register 0x07FF) ........ 83

Operational Controls (Register 0x0A00 to Register 0x0A10)... 92

Clock Part Serial ID (Register 0x0C00 to Register 0x0C07) 97

Status Readback (Register 0x0D00 to Register 0x0D19) ...... 97

Nonvolatile Memory (EEPROM) Control (Register 0x0E00 to

EEPROM Storage Sequence (Register 0x0E10 to

Power Supply Partitions............................................................... 106

3.3 V Supplies............................................................................ 106

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