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AD9680-LF1000EBZ Datasheet(PDF) 2 Page - Analog Devices |
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AD9680-LF1000EBZ Datasheet(HTML) 2 Page - Analog Devices |
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2 / 97 page  Product Overview Online Documentation Design Resources Discussion Sample & Buy AD9680 Data Sheet Rev. C | Page 2 of 97 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 3 General Description ......................................................................... 4 Specifications..................................................................................... 5 DC Specifications ......................................................................... 5 AC Specifications.......................................................................... 6 Digital Specifications ................................................................... 8 Switching Specifications .............................................................. 9 Timing Specifications ................................................................ 10 Absolute Maximum Ratings.......................................................... 12 Thermal Characteristics ............................................................ 12 ESD Caution................................................................................ 12 Pin Configuration and Function Descriptions........................... 13 Typical Performance Characteristics ........................................... 15 AD9680-1250.............................................................................. 15 AD9680-1000.............................................................................. 19 AD9680-820 ................................................................................ 24 AD9680-500 ................................................................................ 29 Equivalent Circuits......................................................................... 33 Theory of Operation ...................................................................... 35 ADC Architecture ...................................................................... 35 Analog Input Considerations.................................................... 35 Voltage Reference ....................................................................... 41 Clock Input Considerations...................................................... 42 ADC Overrange and Fast Detect.................................................. 44 ADC Overrange.......................................................................... 44 Fast Threshold Detection (FD_A and FD_B) ........................ 44 Signal Monitor ................................................................................ 45 SPORT Over JESD204B............................................................. 46 Digital Downconverter (DDC)..................................................... 48 DDC I/Q Input Selection .......................................................... 48 DDC I/Q Output Selection ....................................................... 48 DDC General Description ........................................................ 48 Frequency Translation ................................................................... 54 Frequency Translation General Description.............................. 54 DDC NCO Plus Mixer Loss and SFDR................................... 55 Numerically Controlled Oscillator .......................................... 55 FIR Filters ........................................................................................ 57 FIR Filters General Description ............................................... 57 Half-Band Filters ........................................................................ 58 DDC Gain Stage ......................................................................... 60 DDC Complex to Real Conversion ......................................... 60 DDC Example Configurations ................................................. 61 Digital Outputs ............................................................................... 64 Introduction to the JESD204B Interface ................................. 64 JESD204B Overview .................................................................. 64 Functional Overview ................................................................. 65 JESD204B Link Establishment ................................................. 65 Physical Layer (Driver) Outputs .............................................. 67 JESD204B Tx Converter Mapping........................................... 69 Configuring the JESD204B Link.............................................. 71 Multichip Synchronization............................................................ 74 SYSREF± Setup/Hold Window Monitor................................. 76 Test Modes....................................................................................... 78 ADC Test Modes ........................................................................ 78 JESD204B Block Test Modes .................................................... 79 Serial Port Interface........................................................................ 81 Configuration Using the SPI..................................................... 81 Hardware Interface..................................................................... 81 SPI Accessible Features.............................................................. 81 Memory Map .................................................................................. 82 Reading the Memory Map Register Table............................... 82 Memory Map Register Table..................................................... 83 Applications Information .............................................................. 96 Power Supply Recommendations............................................. 96 Exposed Pad Thermal Heat Slug Recommendations............ 96 AVDD1_SR (Pin 57) and AGND (Pin 56 and Pin 60).............. 96 Outline Dimensions....................................................................... 97 Ordering Guide .......................................................................... 97 |
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