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EVAL-AD7765EBZ Datasheet(PDF) 2 Page - Analog Devices |
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EVAL-AD7765EBZ Datasheet(HTML) 2 Page - Analog Devices |
2 / 32 page AD7765 Rev. 0 | Page 2 of 32 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 6 Timing Diagrams.......................................................................... 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration and Functional Descriptions.......................... 9 Typical Performance Characteristics ........................................... 11 Terminology .................................................................................... 14 Theory of Operation ...................................................................... 15 Σ-Δ Modulation and Digital Filtering...................................... 15 AD7765 Input Structure ................................................................ 16 On-Chip Differential Amplifier ............................................... 17 Modulator Input Structure........................................................ 18 AD7765 Interface............................................................................ 19 Reading Data............................................................................... 19 Reading Status and Other Registers......................................... 19 Writing to the AD7765 .............................................................. 19 AD7765 Functionality.................................................................... 20 Synchronization.......................................................................... 20 Overrange Alerts ........................................................................ 20 Power Modes............................................................................... 20 Decimation Rate Pin.................................................................. 21 Daisy Chaining ............................................................................... 22 Reading Data in Daisy-Chain Mode ....................................... 22 Writing Data in Daisy-Chain Mode ........................................ 23 Clocking the AD7765 .................................................................... 24 MCLK Jitter Requirements ....................................................... 24 Decoupling and Layout Information ........................................... 25 Supply Decoupling ..................................................................... 25 Reference Voltage Filtering ....................................................... 25 Differential Amplifier Components ........................................ 25 Layout Considerations............................................................... 25 Using the AD7765 ...................................................................... 26 Bias Resistor Selection ............................................................... 26 AD7765 Registers ........................................................................... 27 Control Register ......................................................................... 27 Status Register............................................................................. 27 Gain Register—Address 0x0004............................................... 28 Overrange Register—Address 0x0005..................................... 28 Outline Dimensions ....................................................................... 29 Ordering Guide .......................................................................... 29 REVISION HISTORY 6/07—Revision 0: Initial Version |
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