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AD9981
TABLE OF CONTENTS
Analog Interface Specifications......................................................3
Rev. 0 | Page 2 of 44
Absolute Maximum Ratings............................................................5
Explanation of Test Levels...........................................................5
ESD Caution..................................................................................5
Pin Configuration and Function Descriptions.............................6
Design Guide...................................................................................11
General Description...................................................................11
Digital Inputs ..............................................................................11
Input Signal Handling................................................................11
Hsync and Vsync Inputs............................................................11
Serial Control Port .....................................................................11
Output Signal Handling.............................................................11
Clamping.....................................................................................11
Gain and Offset Control............................................................12
Timing Diagrams........................................................................20
Hsync Timing .............................................................................21
Coast Timing...............................................................................21
Output Formatter.......................................................................21
Two-Wire Serial Register Map......................................................23
Detailed 2-Wire Serial Control Register Descriptions.............. 29
Chip Identification..................................................................... 29
PLL Divider Control.................................................................. 29
Clock Generator Control .......................................................... 29
Phase Adjust................................................................................ 30
Input Gain................................................................................... 30
Input Offset................................................................................. 30
Hsync Controls........................................................................... 31
Vsync Controls........................................................................... 31
Coast and Clamp Controls........................................................ 32
SOG Control............................................................................... 34
Input and Power Control........................................................... 34
Output Control........................................................................... 35
Two-Wire Serial Control Port....................................................... 40
Data Transfer via Serial Interface............................................. 40
PCB Layout Recommendations ............................................... 42
PLL............................................................................................... 42
Outline Dimensions....................................................................... 44
Ordering Guide .......................................................................... 44
REVISION HISTORY
1/05—Initial Version: Revision 0