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AD7985BCPZ-RL7 bảng dữ liệu(PDF) 3 Page - Analog Devices |
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3 / 29 page AD7985 Data Sheet Rev. C | 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 the AD7985 Performance ...................................... 25 Outline Dimensions ....................................................................... 27 Ordering Guide .......................................................................... 27 REVISION HISTORY 3/16—Rev. B to Rev. C Changes to Table 1............................................................................ 1 Change to Endnote 3, Table 1 ......................................................... 3 Change to Signal-to-Noise-and-Distortion Ratio Parameter, Table 2 ................................................................................................ 3 Deleted Endnote 4, Table 2.............................................................. 3 Changes to Figure 4.......................................................................... 7 Changes to Figure 23...................................................................... 14 Changes to Driver Amplifier Choice Section ............................. 15 Change to Reference Decoupling Section ................................... 16 Changes to Reading During Conversion, Fast Host (Turbo or Normal Mode) Section and Split-Reading, Any Speed Host (Turbo or Normal Mode) Section ................................................ 18 Changes to Figure 31...................................................................... 21 Updated Outline Dimensions ....................................................... 27 Changes to Ordering Guide .......................................................... 27 7/14—Rev. A to Rev. B Added Patent Endnote......................................................................1 Changes to Figure 21...................................................................... 13 Changes to Data Reading Options Section................................. 18 Updated Outline Dimensions....................................................... 27 8/10—Rev. 0 to Rev. A Change to Table 4, Conversion Time: CNV Rising Edge to Data Available................................................................................5 9/09—Revision 0: Initial Version |
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