AD9779A-EBZ Analog Devices Inc, AD9779A-EBZ Datasheet - Page 2

• Manufacturer Part Number: AD9779A-EBZ
• Description: Dual 16B, 1.0 GSPS TxDAC
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9779A-EBZ

• Design Resources: Interfacing ADL5370 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0016) Interfacing ADL5371 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0017) Interfacing ADL5372 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0018) Interfacing ADL5373 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0019) Interfacing ADL5374 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0020) Interfacing ADL5375 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0021)
• Number Of Dac's: 2
• Number Of Bits: 16
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 1G
• Data Interface: Serial
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9779A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Settling Time: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9776A/AD9778A/AD9779A
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Typical Signal Chain ......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications ..................................................................................... 4
Absolute Maximum Ratings ............................................................ 7
Pin Configurations and Function Descriptions ........................... 8
Typical Performance Characteristics ........................................... 14
Terminology .................................................................................... 22
Theory of Operation ...................................................................... 23
Serial Peripheral Interface ............................................................. 24
SPI Register Map ............................................................................. 26
Interpolation Filter Architecture .................................................. 31
REVISION HISTORY
3/08—Rev. 0 to Rev. A
Changes to Features .......................................................................... 1
Added Note 2 .................................................................................... 4
Changes to Table 2 ............................................................................ 5
Changes to Table 3 ............................................................................ 6
Changes to Thermal Resistance Section ........................................ 7
Inserted Table 6 ................................................................................. 8
Changes to Pin 39 Description, Table 7 ......................................... 9
Changes to Pin 39 Description, Table 8 ....................................... 10
Changes to Pin 39 Description, Table 9 ....................................... 12
Changes to Theory of Operation Section .................................... 23
DC Specifications ......................................................................... 4
Digital Specifications ................................................................... 5
Digital Input Data Timing Specifications ................................. 6
AC Specifications .......................................................................... 6
Thermal Resistance ...................................................................... 7
ESD Caution .................................................................................. 7
Differences Between AD9776/AD9778/ AD9779 and
AD9776A/AD9778A/AD9779A............................................... 23
General Operation of the Serial Interface ............................... 24
Instruction Byte .......................................................................... 24
Serial Interface Port Pin Descriptions ..................................... 25
MSB/LSB Transfers..................................................................... 25
Interpolation Filter Bandwidth Limits .................................... 35
Rev. A | Page 2 of 60
Sourcing the DAC Sample Clock ................................................. 36
Full-Scale Current Generation ..................................................... 39
Transmit Path Gain and Offset Correction................................. 40
Input Data Ports ............................................................................. 42
Device Synchronization ................................................................. 45
Power Dissipation ........................................................................... 47
Evaluation Board Operation ......................................................... 49
Outline Dimensions ....................................................................... 60
Changes to Table 10 ....................................................................... 23
Changes to Table 13 ....................................................................... 26
Changes to Table 14 ....................................................................... 27
Changes to Interpolation Filter Architecture Section ............... 33
Replaced Sourcing the DAC Sample Clock Section .................. 36
Replaced Transmit Path Gain and Offset Correction Section . 40
Replaced Input Data Ports Section .............................................. 42
Replaced Device Synchronization Section .................................. 45
Deleted Figure 112 to Figure 117 ................................................. 58
8/07—Revision 0: Initial Version
Direct Clocking .......................................................................... 36
Clock Multiplication .................................................................. 36
Driving the REFCLK Input ....................................................... 38
Internal Reference ...................................................................... 39
I/Q Channel Gain Matching ..................................................... 40
Auxiliary DAC Operation ......................................................... 40
LO Feedthrough Compensation .............................................. 41
Results of Gain and Offset Correction .................................... 41
Single Port Mode ........................................................................ 42
Dual Port Mode .......................................................................... 42
Input Data Referenced to DATACLK ...................................... 42
Input Data Referenced to REFCLK ......................................... 43
Optimizing the Data Input Timing .......................................... 44
Synchronization Logic Overview ............................................. 45
Synchronizing Devices to a System Clock .............................. 46
Interrupt Request Operation .................................................... 46
Power-Down and Sleep Modes................................................. 48
Using the ADL5372 Quadrature Modulator .......................... 51
Evaluation Board Schematics ................................................... 52
Ordering Guide .......................................................................... 60