AD9765 Просмотр технического описания (PDF) - Analog Devices

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AD9765

10-/12-/14-Bit, 125 MSPS Dual TxDAC+ Digital-to-Analog Converters

Analog Devices 

AD9763/AD9765/AD9767

Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 5

DC Specifications ......................................................................... 5

Dynamic Specifications ............................................................... 6

Digital Specifications ................................................................... 7

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 11

AD9763 ........................................................................................ 11

AD9765 ........................................................................................ 14

AD9767 ........................................................................................ 17

Terminology .................................................................................... 20

Theory of Operation ...................................................................... 21

Functional Description.............................................................. 21

Reference Operation .................................................................. 22

Gain Control Mode .................................................................... 22

Setting the Full-Scale Current................................................... 22

DAC Transfer Function ............................................................. 23

Analog Outputs........................................................................... 23

Digital Inputs .............................................................................. 24

DAC Timing................................................................................ 24

Sleep Mode Operation............................................................... 26

Power Dissipation....................................................................... 26

Applying the AD9763/AD9765/AD9767 .................................... 28

Output Configurations .............................................................. 28

Differential Coupling Using a Transformer............................ 28

Differential Coupling Using an Op Amp................................ 28

Single-Ended, Unbuffered Voltage Output............................. 29

Single-Ended, Buffered Voltage Output Configuration........ 29

Power and Grounding Considerations.................................... 29

Applications Information .............................................................. 31

VDSL Example Applications Using the

AD9765 and AD9767 ................................................................ 31

Quadrature Amplitude Modulation (QAM) Example Using

the AD9763 ................................................................................. 32

CDMA ......................................................................................... 33

Evaluation Board ............................................................................ 34

General Description................................................................... 34

Schematics................................................................................... 34

Evaluation Board Layout........................................................... 40

Outline Dimensions ....................................................................... 42

Ordering Guide .......................................................................... 42

REVISION HISTORY

Revision History: AD9763/AD9765/AD9767

8/11—Rev. F to Rev. G

Changes to Gain Control Mode Section and Setting the Full-

Scale Current Section..................................................................... 22

Changes to DAC Transfer Function Section............................... 23

Changes to Power Supply Rejection Section............................... 29

6/09—Rev. E to Rev. F

Replaced Figure 86 to Figure 90 with Figure 86 to Figure 91,

Deleted Original Figure 91 to Figure 94...................................... 34

1/08—Revision E: Initial Combined Version

Revision History: AD9763

1/08—Rev. D to Rev. E

Combined with AD9765 and AD9767 Data Sheets.......Universal

Changes to Figure 1...........................................................................1

Changes to Applications Section.....................................................1

Changes to Timing Diagram Section .............................................7

Added Figure 4 and Figure 5............................................................9

Changes to Table 6.......................................................................... 10

Change to Typical Performance Characteristics Section

Conditions Statement .................................................................... 11

Added Figure 23 to Figure 56 ....................................................... 14

Added Note to Figure 58 ............................................................... 20

Changes to Functional Description Section ............................... 22

Changes to Figure 59 and Figure 60............................................. 22

Changes to Gain Control Mode Section ..................................... 22

Rev. G | Page 2 of 44

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