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AD6650ABC Datasheet(PDF) 3 Page - Analog Devices |
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AD6650ABC Datasheet(HTML) 3 Page - Analog Devices |
3 / 45 page AD6650 Rev. A | Page 2 of 44 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Product Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Explanation of Test Levels ........................................................... 3 AC Specifications.......................................................................... 3 Digital Specifications ................................................................... 4 Electrical Characteristics............................................................. 5 General Timing Characteristics ................................................. 5 Microprocessor Port Timing Characteristics ........................... 6 Timing Diagrams.......................................................................... 7 Absolute Maximum Ratings.......................................................... 10 Thermal Characteristics ............................................................ 10 ESD Caution................................................................................ 10 Pin Configuration and Function Descriptions........................... 11 Typical Performance Characteristics ........................................... 13 Terminology .................................................................................... 14 Equivalent Circuits ......................................................................... 15 Theory of Operation ...................................................................... 16 Analog Front End ....................................................................... 16 Digital Back End......................................................................... 16 DC Correction ............................................................................ 16 Fourth-Order Cascaded Integrator Comb Filter (CIC4) ...... 17 Infinite Impulse Response (IIR) Filter..................................... 18 RAM Coefficient Filter .............................................................. 18 Composite Filter ......................................................................... 19 Fine DC Correction ................................................................... 20 Peak Detector DC Correction Ranging................................... 20 User-Configurable Built-In Self-Test (BIST) .......................... 21 LO Synthesis................................................................................ 22 LDO.............................................................................................. 23 AGC Loop/Relinearization ....................................................... 23 Serial Output Data Port............................................................. 24 Application Information................................................................ 26 Required Settings and Start-up Sequence for DC Correction ....................................................................................................... 26 Clocking the AD6650 ................................................................ 26 Driving the Analog Inputs ........................................................ 27 External Reference ..................................................................... 27 Power Supplies ............................................................................ 27 Digital Outputs ........................................................................... 28 Grounding ................................................................................... 28 Layout Information .................................................................... 28 Chip Synchronization ................................................................ 29 Microport Control.......................................................................... 30 External Memory Map .............................................................. 30 Access Control Register (ACR) ................................................ 30 Channel Address Register (CAR) ............................................ 30 Special Function Registers ........................................................ 30 Data Address Registers .............................................................. 31 Write Sequencing ....................................................................... 31 Read Sequencing ........................................................................ 31 Read/Write Chaining ................................................................. 31 Programming Modes ................................................................. 31 JTAG Boundary Scan................................................................. 32 Register Map ................................................................................... 33 Register Details ........................................................................... 39 Outline Dimensions ....................................................................... 44 Ordering Guide .......................................................................... 44 REVISION HISTORY 1/07—Rev. 0 to Rev. A Updated Format..................................................................Universal Changes to Specifications ................................................................ 3 Changes to Figure 18...................................................................... 13 Changes to Power Supplies Section.............................................. 27 Changes to Ordering Guide .......................................................... 44 3/06—Revision 0: Initial Version |
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