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AD9856 Datasheet(PDF) 3 Page - Analog Devices |
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AD9856 Datasheet(HTML) 3 Page - Analog Devices |
3 / 37 page AD9856 Rev. C | Page 2 of 36 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Explanation of Test Levels ........................................................... 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 8 Typical Modulated Output Spectral Plots ................................. 8 Typical Single-Tone Output Spectral Plots ............................... 9 Typical Narrow-Band SFDR Spectral Plots ............................ 10 Typical Phase Noise Spectral Plots........................................... 10 Typical Plots of Output Constellations.................................... 11 Power Consumption .................................................................. 12 Serial Control Bus Register ........................................................... 13 Register Bit Definitions.............................................................. 14 Theory of Operation ...................................................................... 15 Modulation Mode Operation ................................................... 15 Input Word Rate (fW) vs. REFCLK Relationship .................... 16 I/Q Data Synchronization ......................................................... 16 Half-Band Filters (HBFs) .......................................................... 20 Cascaded Integrator Comb (CIC) Filter.................................. 21 Digital Quadrature Modulator ................................................. 23 Inverse Sinc Filter (ISF) ............................................................. 24 Direct Digital Synthesizer Function ........................................ 25 D/A Converter ............................................................................ 25 Reference Clock Multiplier ....................................................... 26 Throughput and Latency........................................................... 26 Control Interface ........................................................................ 26 General Operation of the Serial Interface............................... 26 Instruction Byte .......................................................................... 27 Serial Interface Port Pin Descriptions ..................................... 28 MSB/LSB Transfers .................................................................... 28 Notes on Serial Port Operation ................................................ 28 Programming/Writing the AD8320/AD8321 Cable Driver Amplifier Gain Control ............................................................. 30 Understanding and Using Pin-Selectable Modulator Profiles ....................................................................................................... 31 Power Dissipation Considerations........................................... 31 AD9856 Evaluation Board ........................................................ 32 Support ........................................................................................ 32 Outline Dimensions ....................................................................... 35 Ordering Guide .......................................................................... 35 REVISION HISTORY 1/05—Rev. B to Rev. C Updated Format..................................................................Universal Changes to Table 2............................................................................ 5 Changes to Input Word Rate (fw) vs. REFCLK Relationship Section.................................................................. 16 Changes to Cascaded Integrator Comb (CIC) Filter Section ... 21 Updates to Direct Digital Synthesizer Function Section........... 25 Added Support Section.................................................................. 32 Updated Outline Dimensions ....................................................... 35 Changes to Ordering Guide .......................................................... 35 9/99—Rev. A to Rev. B |
Similar Part No. - AD9856_17 |
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Similar Description - AD9856_17 |
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