AD9943/AD9944
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Equivalent Input Circuits .............................................................. 10
Typical Performance Characteristics ........................................... 11
Internal Register Map .................................................................... 12
Serial Interface ................................................................................ 13
Circuit Description and Operation.............................................. 14
DC Restore .................................................................................. 14
Correlated Double Sampler ...................................................... 14
Optical Black Clamp.................................................................. 14
A/D Converter............................................................................ 15
Variable Gain Amplifier ............................................................ 15
CCD Mode Timing ........................................................................ 16
Applications Information.............................................................. 17
Internal Power-On Reset Circuitry.......................................... 18
Grounding and Decoupling Recommendations.................... 18
Outline Dimensions....................................................................... 19
Ordering Guide............................................................................... 19
Applications....................................................................................... 1
General Description......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
General Specifications ................................................................. 3
Digital Specifications ................................................................... 3
AD9943 System Specifications ................................................... 3
AD9944 System Specifications ................................................... 4
Timing Specifications .................................................................. 5
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Terminology ...................................................................................... 9
REVISION HISTORY
3/14—Rev. B to Rev. C
Added Exposed Pad Notation, Figure 2 and Table 6 ................... 7
Added Exposed Pad Notation, Figure 3 and Table 7 ................... 8
Changes to Figure 17...................................................................... 17
Changes to Figure 18...................................................................... 18
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 19
5/04—Data Sheet Changed from Rev. A to Rev. B
Updated Format..................................................................Universal
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 20
5/03—Data Sheet changed from Rev. 0 to Rev. A
Added AD9944 ...................................................................Universal
Changes to Features Section............................................................ 1
Updated Ordering Guide................................................................. 5
Replaced TPC 3................................................................................. 9
Added Figure 12.............................................................................. 15
Updated Outline Dimensions ....................................................... 16
Rev. C | Page 2 of 20
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