AD9985A

Rev. 0 | Page 2 of 32

TABLE OF CONTENTS

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

12-Bit Divisor Register .......................................................... 14

2-Bit VCO Range Register .................................................... 14

3-Bit Charge Pump Current Register .................................. 14

5-Bit Phase Adjust Register................................................... 14

Power Management.................................................................... 14

Timing.......................................................................................... 15

Hsync Timing ............................................................................. 15

Coast Timing .............................................................................. 16

2-Wire Serial Register Map ........................................................... 17

2-Wire Serial Control Register Detail Chip Identification ... 19

PLL Divider Control .................................................................. 19

Clock Generator Control .......................................................... 20

Clamp Timing............................................................................. 20

Hsync Pulse Width..................................................................... 20

Input Gain ................................................................................... 20

Input Offset ................................................................................. 21

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 ............................................................................................... 29

Outputs (Both Data and Clocks).............................................. 30

Digital Inputs .............................................................................. 30

Voltage Reference ....................................................................... 30

Outline Dimensions ....................................................................... 31

Ordering GuIde .......................................................................... 31

REVISION HISTORY

7/05—Revision 0: Initial Version