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AD9985
TABLE OF CONTENTS
Revision History...........................................................................2
Rev. 0 | Page 2 of 32
Specifications.....................................................................................3
Explanation of Test Levels...........................................................6
Absolute Maximum Ratings............................................................7
ESD Caution..................................................................................7
Pin Configuration and Function Descriptions.............................8
Design Guide...................................................................................11
General Description...................................................................11
Digital Inputs ..............................................................................11
Input Signal Handling................................................................11
Hsync, Vsync Inputs...................................................................11
Serial Control Port .....................................................................11
Output Signal Handling.............................................................11
Clamping.....................................................................................11
RGB Clamping........................................................................11
YUV Clamping.......................................................................12
Gain and Offset Control............................................................12
Auto Offset..............................................................................12
Sync-on-Green............................................................................13
Clock Generation .......................................................................13
Power Management....................................................................14
Timing..........................................................................................15
Hsync Timing .............................................................................15
Coast Timing...............................................................................15
2-Wire Serial Register Map....................................................... 16
2-Wire Serial Control Register Detail Chip Identification... 19
PLL Divider Control.................................................................. 19
Clock Generator Control .......................................................... 19
Clamp Timing............................................................................. 20
Hsync Pulsewidth....................................................................... 20
Input Gain................................................................................... 20
Input Offset................................................................................. 20
Mode Control 1.......................................................................... 21
2-Wire Serial Control Port........................................................ 26
Data Transfer via Serial Interface............................................. 26
Sync Slicer.................................................................................... 28
Sync Separator............................................................................ 28
PCB Layout Recommendations ............................................... 29
Analog Interface Inputs............................................................. 29
Power Supply Bypassing............................................................ 29
PLL............................................................................................... 30
Outputs (Both Data and Clocks).............................................. 30
Digital Inputs.............................................................................. 30
Voltage Reference....................................................................... 30
Outline Dimensions....................................................................... 31
Ordering GuIde.......................................................................... 31
REVISION HISTORY
5/04—Revision 0: Initial Version