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AD9980
TABLE OF CONTENTS
Analog Interface specifications.......................................................3
Rev. 0 | Page 2 of 44
Electrical Characteristics.............................................................3
Absolute Maximum Ratings............................................................5
Explanation of Test Levels...........................................................5
ESD Caution..................................................................................5
Pin Configuration and Function Descriptions.............................6
Design Guide...................................................................................10
General Description...................................................................10
Digital Inputs ..............................................................................10
Input Signal Handling................................................................10
Hsync and Vsync Inputs............................................................10
Serial Control Port .....................................................................10
Output Signal Handling.............................................................10
Clamping.....................................................................................10
Gain and Offset Control............................................................11
Timing Diagrams........................................................................19
Hsync Timing .............................................................................20
Coast Timing...............................................................................20
Output Formatter.......................................................................20
Two-Wire Serial Register Map......................................................22
Detailed 2-Wire Serial Control Register Descriptions..............28
Chip Identification.....................................................................28
PLL Divider Control.................................................................. 28
Clock Generator Control .......................................................... 28
Phase Adjust................................................................................ 29
Input Gain................................................................................... 29
Input Offset................................................................................. 29
Hsync Controls........................................................................... 29
Vsync Controls........................................................................... 30
Coast and Clamp Controls........................................................ 31
SOG Control............................................................................... 33
Input and Power Control........................................................... 33
Output Control........................................................................... 34
Sync Processing .......................................................................... 35
Detection Status.......................................................................... 36
Polarity Status............................................................................. 36
Hsync Count............................................................................... 37
Two-Wire Serial Control Port....................................................... 38
Data Transfer via Serial Interface............................................. 38
PCB Layout Recommendations ............................................... 40
PLL............................................................................................... 40
Outline Dimensions....................................................................... 42
Ordering Guide .......................................................................... 42
REVISION HISTORY
1/05—Initial Version: Revision 0