AD9779A-EBZ Analog Devices Inc, AD9779A-EBZ Datasheet - Page 49

• 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

EVALUATION BOARD OPERATION
The AD9776A/AD9778A/AD9779A evaluation board is
designed to optimize the DAC performance and the speed of
the digital interface, yet remains user friendly. To operate the
board, the user needs a power source, a clock source, and a
digital data source. The user also needs a spectrum analyzer
or an oscilloscope to look at the DAC output. The diagram in
CLOCK IN
Figure 102. AD9776A/AD9778A/AD9779A Evaluation Board Showing All Connections
GENERATOR
PATTERN
DIGITAL
P4 DIGITAL INPUT CONNECTOR
DATACLK OUT
ADAPTER
CABLES
AUX33
S7 DCLKOUT
GENERATOR
CLOCK
DVDD18
Figure 101. Typical Test Setup
CLKIN
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EVALUATION
AD9779A
AD9776A/
AD9778A/
AD9779A
SPI PORT
BOARD
DVDD33
SPI PORT
J1 CLOCK IN
JP15
JP14
JP16
JP17
JP4
JP8
JP3
JP2
Figure 101 illustrates the test setup. A sine or square wave clock
works well as a clock source. The dc offset on the clock is not a
problem, because the clock is ac-coupled on the evaluation board
before the REFCLK inputs. All necessary connections to the
evaluation board are shown in more detail in Figure 102.
CVDD18
S5 OUTPUT 1
S6 OUTPUT 2
AVDD33
ADL537x
1.8V POWER SUPPLY
3.3V POWER SUPPLY
SPECTRUM
ANALYZER
MODULATOR
LOCAL OSC
5V SUPPLY
ANALOG
AD9776A/
AD9788A/
OUTPUT
DEVICES
AD9779A
INPUT
J2
AD9776A/AD9778A/AD9779A
+5V
GND