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AD9121 Arkusz danych(PDF) 3 Page - Analog Devices

Numer części AD9121
Szczegółowy opis  TxDAC Digital-to-Analog Converter
Download  61 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

AD9121 Arkusz danych(HTML) 3 Page - Analog Devices

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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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