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AD9121 Datasheet(PDF) 3 Page - Analog Devices |
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AD9121 Datasheet(HTML) 3 Page - Analog Devices |
3 / 61 page AD9121 Data Sheet Rev. B | Page 2 of 60 TABLE OF CONTENTS Features .....................................................................................1 Applications...............................................................................1 General Description ..................................................................1 Product Highlights ....................................................................1 Companion Products.................................................................1 Typical Signal Chain..................................................................1 Revision History........................................................................3 Functional Block Diagram.........................................................4 Specifications.............................................................................5 DC Specifications...................................................................5 Digital Specifications .............................................................6 Digital Input Data Timing Specifications...............................6 AC Specifications...................................................................7 Absolute Maximum Ratings ......................................................8 Thermal Resistance................................................................8 ESD Caution..........................................................................8 Pin Configuration and Function Descriptions...........................9 Typical Performance Characteristics .......................................11 Terminology ............................................................................17 Theory of Operation................................................................18 Serial Port Operation...........................................................18 Data Format.........................................................................18 Serial Port Pin Descriptions.................................................18 Serial Port Options...............................................................19 Device Configuration Register Map and Descriptions.........20 LVDS Input Data Ports............................................................31 Word Interface Mode...........................................................31 Byte Interface Mode.............................................................31 Interface Timing..................................................................31 Recommended Frame Input Bias Circuitry .........................32 FIFO Operation ...................................................................32 Digital Datapath ......................................................................36 Premodulation.....................................................................36 Interpolation Filters.............................................................36 NCO Modulation.................................................................39 Datapath Configuration.......................................................39 Determining Interpolation Filter Modes..............................40 Datapath Configuration Examples.......................................41 Data Rates vs. Interpolation Modes .....................................42 Coarse Modulation Mixing Sequences ................................42 Quadrature Phase Correction..............................................43 DC Offset Correction..........................................................43 Inverse Sinc Filter ................................................................43 DAC Input Clock Configurations............................................44 Driving the DACCLK and REFCLK Inputs.........................44 Direct Clocking...................................................................44 Clock Multiplication............................................................44 PLL Settings.........................................................................45 Configuring the VCO Tuning Band.....................................45 Analog Outputs.......................................................................46 Transmit DAC Operation....................................................46 Auxiliary DAC Operation....................................................47 Interfacing to Modulators....................................................48 Baseband Filter Implementation..........................................48 Driving the ADL5375-15.....................................................48 Reducing LO Leakage and Unwanted Sidebands.................49 Device Power Management.....................................................50 Power Dissipation................................................................50 Temperature Sensor.............................................................51 Multichip Synchronization......................................................52 Synchronization with Clock Multiplication ............................52 Synchronization with Direct Clocking.................................53 Data Rate Mode Synchronization........................................53 FIFO Rate Mode Synchronization .......................................54 Additional Synchronization Features...................................55 Interrupt Request Operation...................................................56 Interrupt Service Routine....................................................56 Interface Timing Validation ....................................................57 SED Operation ....................................................................57 SED Example.......................................................................58 Example Start-Up Routine.......................................................59 Device Configuration ..........................................................59 Derived PLL Settings...........................................................59 Derived NCO Settings.........................................................59 Start-Up Sequence...............................................................59 Outline Dimensions ................................................................60 Ordering Guide ...................................................................60 |
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