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AD7944 Datasheet(PDF) 2 Page - Analog Devices |
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AD7944 Datasheet(HTML) 2 Page - Analog Devices |
2 / 28 page AD7944 Rev. 0 | Page 2 of 28 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Application Diagram........................................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 9 Terminology .................................................................................... 12 Theory of Operation ...................................................................... 13 Circuit Information.................................................................... 13 Converter Operation.................................................................. 13 Conversion Modes of Operation.............................................. 13 Typical Connection Diagram ................................................... 14 Analog Inputs ............................................................................. 15 Driver Amplifier Choice ........................................................... 15 Voltage Reference Input ............................................................ 16 Power Supply............................................................................... 16 Digital Interface .............................................................................. 17 Data Reading Options ............................................................... 18 CS Mode, 3-Wire Without Busy Indicator ............................. 19 CS Mode, 3-Wire with Busy Indicator .................................... 20 CS Mode, 4-Wire Without Busy Indicator ............................. 21 CS Mode, 4-Wire with Busy Indicator .................................... 22 Chain Mode Without Busy Indicator ...................................... 23 Chain Mode with Busy Indicator ............................................. 24 Applications Information .............................................................. 25 Layout .......................................................................................... 25 Evaluating AD7944 Performance............................................. 25 Outline Dimensions ....................................................................... 27 Ordering Guide .......................................................................... 27 REVISION HISTORY 10/09—Revision 0: Initial Version |
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