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AD9984A
TABLE OF CONTENTS
Features..............................................................................................1
Applications.......................................................................................1
Functional Block Diagram..............................................................1
General Description.........................................................................1
Revision History...............................................................................2
Specifications.....................................................................................3
Analog Interface Characteristics................................................3
Absolute Maximum Ratings............................................................5
Explanation of Test Levels...........................................................5
Thermal Resistance......................................................................5
ESD Caution..................................................................................5
Pin Configurations and Function Descriptions...........................6
Theory of Operation......................................................................11
Digital Inputs ..............................................................................11
Analog Input Signal Handling..................................................11
Hsync and Vsync Inputs............................................................11
Serial Control Port .....................................................................11
Output Signal Handling.............................................................11
Clamping.....................................................................................11
Gain and Offset Control............................................................12
Sync-on-Green............................................................................13
Reference Bypassing...................................................................13
Clock Generation .......................................................................14
Sync Processing...........................................................................16
Power Management....................................................................19
Timing Diagrams........................................................................19
Hsync Timing .............................................................................20
Coast Timing...............................................................................21
Rev. 0 | Page 2 of 44
Output Formatter....................................................................... 21
2-Wire Serial Control Port............................................................ 22
Data Transfer via Serial Interface............................................. 22
2-Wire Serial Register Map........................................................... 24
2-Wire Serial Control Registers.................................................... 30
Chip Identification..................................................................... 30
PLL Divider Control.................................................................. 30
Clock Generator Control .......................................................... 30
Phase Adjust................................................................................ 30
Input Gain................................................................................... 30
Input Offset................................................................................. 31
Hsync Control............................................................................. 31
Vsync Control............................................................................. 32
Coast and Clamp Controls........................................................ 33
SOG Control............................................................................... 34
Input and Power Control........................................................... 35
Output Control........................................................................... 35
Sync Processing .......................................................................... 36
Detection Status.......................................................................... 37
Polarity Status............................................................................. 37
Hsync Count............................................................................... 38
Test Registers............................................................................... 38
PCB Layout Recommendations.................................................... 40
Analog Interface Inputs............................................................. 40
Outputs (Both Data and Clocks).............................................. 40
Digital Inputs.............................................................................. 41
Outline Dimensions....................................................................... 42
Ordering Guide .......................................................................... 42
REVISION HISTORY
7
/07—Revision 0: Initial Version