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AD9520-4 датащи(PDF) 2 Page - Analog Devices

номер детали AD9520-4
подробное описание детали  12 LVPECL/24 CMOS Output Clock Generator with Integrated 1.6 GHz VCO
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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AD9520-4 датащи(HTML) 2 Page - Analog Devices

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AD9520-4
Rev. 0 | Page 2 of 84
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
 
Timing Diagrams ..................................................................... 9
 
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) ..... 13
 
Serial Control Port—SPI Mode ................................................ 13
 
Serial Control Port—I2C Mode ................................................ 14
 
PD, SYNC, and RESET Pins ..................................................... 15 
Serial Port Setup Pins: SP1, SP0 ............................................... 15
 
LD, STATUS, 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
 
Mode 0: Internal VCO and Clock Distribution ................. 28
 
Mode 1: Clock Distribution or External
VCO <1600 MHz ................................................................... 30
 
Mode 2: High Frequency Clock Distribution—CLK or
External VCO > 1600 MHz .................................................. 32
 
Phase-Locked Loop (PLL) .................................................... 34
 
Configuration of the PLL ...................................................... 34
 
Phase Frequency Detector (PFD) ........................................ 34
 
Charge Pump (CP)................................................................. 35
 
On-Chip VCO ........................................................................ 35
 
PLL External Loop Filter....................................................... 35
 
PLL Reference Inputs............................................................. 35
 
Reference Switchover............................................................. 36
 
Reference Divider R............................................................... 36
 
VCXO/VCO Feedback Divider N: P, A, B, R ..................... 36
 
Digital Lock Detect (DLD) ................................................... 38
 
Analog Lock Detect (ALD)................................................... 38
 
Current Source Digital Lock Detect (CSDLD) .................. 38
 
External VCXO/VCO Clock Input (CLK/CLK) ................ 39
 
Holdover.................................................................................. 39
 
Manual Holdover Mode ........................................................ 39
 
Automatic/Internal Holdover Mode.................................... 39
 
Frequency Status Monitors ................................................... 41
 
VCO Calibration .................................................................... 42
 
Zero Delay Operation................................................................ 43
 
Internal Zero Delay Mode..................................................... 43
 
External Zero Delay Mode.................................................... 43
 
Clock Distribution ..................................................................... 44
 
Operation Modes ................................................................... 44
 
CLK or VCO Direct-to-LVPECL Outputs.......................... 44
 
Clock Frequency Division..................................................... 45
 
VCO Divider........................................................................... 45
 
Channel Dividers ................................................................... 45
 
Synchronizing the Outputs—SYNC Function ................... 47
 
LVPECL Output Drivers ....................................................... 48
 
CMOS Output Drivers .......................................................... 49
 
Reset Modes ................................................................................ 49
 
Power-On Reset...................................................................... 49
 
Hardware Reset via the RESET Pin ..................................... 49
 
Soft Reset via the Serial Port................................................. 49
 
Soft Reset to Settings in EEPROM when EEPROM Pin = 0 via
the Serial Port ......................................................................... 49
 


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