AD9984A
TABLE OF CONTENTS
Features .............................................................................................. 1
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
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
REVISION HISTORY
7/07—Revision 0: Initial Version
Rev. 0 | Page 2 of 44
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