Datasheet

AD9520-0 Data Sheet
Rev. A | Page 2 of 80
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications ..................................................................................... 4
Power Supply Requirements ....................................................... 4
PLL Characteristics ...................................................................... 4
Clock Inputs .................................................................................. 7
Clock Outputs ............................................................................... 7
Timing Characteristics ................................................................ 8
Clock Output Additive Phase Noise (Distribution Only;
VCO Divider Not Used) ............................................................ 10
Clock Output Absolute Phase Noise (Internal VCO Used) .. 11
Clock Output Absolute Time Jitter (Clock Generation
Using Internal VCO) .................................................................. 11
Clock Output Absolute Time Jitter (Clock Cleanup
Using Internal VCO) .................................................................. 11
Clock Output Absolute Time Jitter (Clock Generation
Using External VCXO) .............................................................. 12
Clock Output Additive Time Jitter
(VCO Divider Not Used)........................................................... 12
Clock Output Additive Time Jitter (VCO Divider Used) ..... 12
Serial Control Port—SPI Mode ................................................ 13
Serial Control Port—I²C Mode ................................................ 14
PD
, EEPROM,
RESET
, and
SYNC
Pins .................................. 15
Serial Port Setup Pins—SP1, SP0 ............................................. 15
LD, STATUS, and REFMON Pins ............................................ 15
Power Dissipation ....................................................................... 16
Absolute Maximum Ratings .......................................................... 17
Thermal Resistance .................................................................... 17
ESD Caution ................................................................................ 17
Pin Configuration and Function Descriptions ........................... 18
Typical Performance Characteristics ........................................... 21
Terminology .................................................................................... 26
Detailed Block Diagram ................................................................ 27
Theory of Operation ...................................................................... 28
Operational Configurations ...................................................... 28
Zero Delay Operation ................................................................ 42
Clock Distribution ..................................................................... 43
Reset Modes ................................................................................ 49
Power-Down Modes .................................................................. 50
Serial Control Port ......................................................................... 51
SPI/I²C Port Selection ................................................................ 51
I²C Serial Port Operation .......................................................... 51
SPI Serial Port Operation .......................................................... 54
SPI Instruction Word (16 Bits) ................................................. 55
SPI MSB/LSB First Transfers .................................................... 55
EEPROM Operations ..................................................................... 58
Writing to the EEPROM ........................................................... 58
Reading from the EEPROM ..................................................... 58
Programming the EEPROM Buffer Segment ......................... 59
Thermal Performance .................................................................... 60
Register Map ................................................................................... 61
Register Map Descriptions ............................................................ 64
Applications Information .............................................................. 77
Frequency Planning Using the AD9520 .................................. 77
Using the AD9520 Outputs for ADC Clock Applications .... 77
LVPECL Clock Distribution ..................................................... 78
CMOS Clock Distribution ........................................................ 78
Outline Dimensions ....................................................................... 80
Ordering Guide .......................................................................... 80