Datasheet

AD9512
Rev. A | Page 2 of 48
TABLE OF CONTENTS
Specifications..................................................................................... 4
Clock Inputs.................................................................................. 4
Clock Outputs............................................................................... 4
Timing Characteristics ................................................................ 5
Clock Output Phase Noise .......................................................... 7
Clock Output Additive Time Jitter........................................... 10
Serial Control Port ..................................................................... 12
FUNCTION Pin ......................................................................... 13
SYNC Status Pin ......................................................................... 13
Power............................................................................................ 14
Timing Diagrams............................................................................ 15
Absolute Maximum Ratings.......................................................... 16
Thermal Characteristics ............................................................ 16
ESD Caution................................................................................ 16
Pin Configuration and Function Descriptions........................... 17
Ter mi nol og y .................................................................................... 19
Typical Performance Characteristics ........................................... 20
Functional Description .................................................................. 24
Overall.......................................................................................... 24
FUNCTION Pin ......................................................................... 24
RESETB: 58h<6:5> = 00b (Default)..................................... 24
SYNCB: 58h<6:5> = 01b ....................................................... 24
PDB: 58h<6:5> = 11b............................................................. 24
DSYNC and DSYNCB Pins....................................................... 24
Clock Inputs................................................................................ 24
Dividers........................................................................................ 25
Setting the Divide Ratio ........................................................ 25
Setting the Duty Cycle........................................................... 25
Divider Phase Offset .............................................................. 29
Delay Block.................................................................................. 30
Calculating the Delay............................................................. 30
Outputs ........................................................................................ 30
Power-Down Modes .................................................................. 31
Chip Power-Down or Sleep Mode—PDB........................... 31
Distribution Power-Down .................................................... 31
Individual Clock Output Power-Down............................... 31
Individual Circuit Block Power-Down................................ 31
Reset Modes ................................................................................ 31
Power-On Reset—Start-Up Conditions when
VS is Applied........................................................................... 31
Asynchronous Reset via the FUNCTION Pin ................... 31
Soft Reset via the Serial Port................................................. 31
Single-Chip Synchronization.................................................... 32
SYNCB—Hardware SYNC ................................................... 32
Soft SYNC—Register 58h<2>............................................... 32
Multichip Synchronization ....................................................... 32
Serial Control Port ......................................................................... 33
Serial Control Port Pin Descriptions....................................... 33
General Operation of Serial Control Port............................... 33
Framing a Communication Cycle with CSB ...................... 33
Communication Cycle—Instruction Plus Data................. 33
Write ........................................................................................ 33
Read ......................................................................................... 34
The Instruction Word (16 Bits)................................................ 34
MSB/LSB First Transfers ........................................................... 34
Register Map and Description...................................................... 37
Summary Table........................................................................... 37
Register Map Description ......................................................... 39
Power Supply................................................................................... 43
Power Management ................................................................... 43
Applications..................................................................................... 44
Using the AD9512 Outputs for ADC Clock Applications.... 44
CMOS Clock Distribution ........................................................ 44