AD9547
TABLE OF CONTENTS
Features .............................................................................................. 1
Digital Phase-Locked Loop (DPLL) Core............................... 32
Direct Digital Synthesizer (DDS)............................................. 34
Tuning Word Processing ........................................................... 35
Loop Control State Machine..................................................... 36
System Clock Inputs................................................................... 37
SYSCLK PLL Multiplier............................................................. 38
Clock Distribution ..................................................................... 39
Status and Control.......................................................................... 44
Multifunction Pins (M0 to M7) ............................................... 44
IRQ Pin........................................................................................ 45
Watchdog Timer......................................................................... 45
EEPROM ..................................................................................... 46
Serial Control Port ......................................................................... 50
SPI/I2C Port Selection................................................................ 50
SPI Serial Port Operation.......................................................... 50
IꢀC Serial Port Operation.......................................................... 54
I/O Programming Registers.......................................................... 57
Buffered/Active Registers.......................................................... 57
Autoclearing Registers............................................................... 57
Register Access Restrictions...................................................... 57
Register Map ................................................................................... 58
Register Bit Descriptions............................................................... 67
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 (M0 to M7, RESET)............................................... 5
Logic Outputs (M0 to M7, IRQ) ................................................ 5
System Clock Inputs (SYSCLKP, SYSCLKN)............................ 5
Distribution Clock Inputs (CLKINP, CLKINN)...................... 6
Reference Inputs (REFA/REFAA, REFB/REFBB).................... 7
Reference Monitors ...................................................................... 7
Reference Switchover Specifications.......................................... 8
Distribution Clock Outputs (OUT0, OUT1) ........................... 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...................................... 12
Jitter Generation ......................................................................... 13
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
Serial Port Configuration and Part Identification
(Register 0x0000 to Register 0x0005) ...................................... 67
System Clock (SYSCLK) (Register 0x0100 to
Register 0x0108)......................................................................... 68
General Configuration (Register 0x0200 to
Register 0x0214)......................................................................... 69
DPLL Configuration (Register 0x0300 to
Register 0x031B)......................................................................... 72
Clock Distribution Output Configuration
(Register 0x0400 to Register 0x0419)...................................... 74
Reference Input Configuration (Register 0x0500 to
Register 0x0507) .......................................................................... 76
Profile Registers (Register 0x0600 to Register 0x07FF)........ 78
Operational Controls (Register 0x0A00 to
Register 0x0A10) ........................................................................ 88
Status Readback (Register 0x0D00 to Register 0x0D19) ...... 92
Nonvolatile Memory (EEPROM) Control
(Register 0x0E00 to Register 0x0E03) ..................................... 94
EEPROM Storage Sequence (Register 0x0E10 to
Register 0x0E3F).......................................................................... 95
Rev. 0 | Page 2 of 104
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