AD9709AST Analog Devices Inc, AD9709AST Datasheet - Page 2

• Manufacturer Part Number: AD9709AST
• Description: IC DAC 8BIT DUAL 125MSPS 48-LQFP
• Manufacturer: Analog Devices Inc
• Series: TxDAC+®r

Specifications of AD9709AST

• Rohs Status: RoHS non-compliant
• Settling Time: 35ns
• Number Of Bits: 8
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 450mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• For Use With: AD9709-EBZ - BOARD EVAL FOR AD9709

AD9709
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Terminology .................................................................................... 11
Theory of Operation ...................................................................... 12
REVISION HISTORY
9/09—Rev. A to Rev. B
Changes to Power and Grounding Considerations Section ..... 20
Changes to Schematics Section ..................................................... 24
Changes to Evaluation Board Layout Section ............................. 30
1/08—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changed Single Supply Operation to 5 V or 3.3 V ........ Universal
Changes to Figure 1 .......................................................................... 1
Added Timing Diagram Section .................................................... 5
Changes to Figure 3 and Table 6 ..................................................... 7
Change to Figure 12 ......................................................................... 9
Changes to Figure 18 to Figure 20 ................................................ 10
Changes to Functional Description Section ............................... 13
Changes to Reference Operation Section .................................... 13
Changes to Figure 23 and Figure 24 ............................................. 13
Changes to Gain Control Mode Section ...................................... 13
DC Specifications ......................................................................... 3
Dynamic Specifications ............................................................... 4
Digital Specifications ................................................................... 5
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Functional Description .............................................................. 12
Reference Operation .................................................................. 13
Gain Control Mode .................................................................... 13
Setting the Full-Scale Current ................................................... 13
DAC Transfer Function ............................................................. 14
Rev. B | Page 2 of 32
Applying the AD9709 .................................................................... 19
Applications Information .............................................................. 22
Evaluation Board ............................................................................ 24
Outline Dimensions ....................................................................... 32
Replaced Reference Control Amplifier Section with Setting
the Full-Scale Current Section ...................................................... 13
Changes to DAC Transfer Function Section............................... 14
Changes to Interleaved Mode Timing Section ........................... 16
Added Figure 28 ............................................................................. 16
Changes to Power and Grounding Considerations Section ..... 20
Changes to Figure 44 ...................................................................... 22
Deleted Figure 43 ............................................................................ 17
Changes to CDMA Section ........................................................... 23
Changes to Figure 45 Caption ...................................................... 23
Changes to Figure 46 ...................................................................... 24
Changes to Figure 48 ...................................................................... 26
Updated Outline Dimensions ....................................................... 30
Changes to Ordering Guide .......................................................... 30
5/00—Revision 0: Initial Version
Analog Outputs .......................................................................... 14
Digital Inputs .............................................................................. 15
DAC Timing ................................................................................ 15
Sleep Mode Operation ............................................................... 18
Power Dissipation....................................................................... 18
Output Configurations .............................................................. 19
Differential Coupling Using a Transformer ............................ 19
Differential Coupling Using an Op Amp ................................ 19
Single-Ended, Unbuffered Voltage Output ............................. 20
Single-Ended, Buffered Voltage Output Configuration ........ 20
Power and Grounding Considerations .................................... 20
Quadrature Amplitude Modulation (QAM) Using the
AD9709 ........................................................................................ 22
CDMA ......................................................................................... 23
General Description ................................................................... 24
Schematics ................................................................................... 24
Evaluation Board Layout ........................................................... 30
Ordering Guide .......................................................................... 32