AD9775BSVRL Analog Devices Inc, AD9775BSVRL Datasheet - Page 44

• Manufacturer Part Number: AD9775BSVRL
• Description: IC DAC 14BIT DUAL 160MSPS 80TQFP
• Manufacturer: Analog Devices Inc
• Series: TxDAC+®r

Specifications of AD9775BSVRL

• Rohs Status: RoHS non-compliant
• Settling Time: 11ns
• Number Of Bits: 14
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 410mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
• For Use With: AD9775-EBZ - BOARD EVALUATION FOR AD9775

AD9775
EVALUATION BOARD
The AD9775 evaluation board allows easy configuration of the
various modes, programmable via the SPI port. Software is
available for programming the SPI port from PCs running
Windows® 95, Windows 98, or Windows NT®/2000. The
evaluation board also contains an AD8345 quadrature
modulator and support circuitry that allows the user to
optimally configure the AD9775 in an image reject transmit
signal chain.
Figure 101 to Figure 104 show how to configure the evaluation
board in the one-port and two-port input modes with the PLL
enabled and disabled. Refer to Figure 105 to Figure 114, the
schematics, and the layout for the AD9775 evaluation board for
the jumper locations described in the DAC Single-Ended
Outputs section. The AD9775 outputs can be configured for
various applications by referring to the following instructions.
DAC Single-Ended Outputs
Remove Transformers T2 and T3. Solder jumper links JP4 or JP28
to look at the DAC1 outputs. Solder jumper links JP29 or JP30 to
look at the DAC2 outputs. Jumper 8 and Jumper 13 to Jumper 17
should remain unsoldered. Jumper JP35 to Jumper JP38 can be
used to ground one of the DAC outputs while the other is
measured single ended. Optimum single-ended distortion
performance is typically achieved in this manner. The outputs
are taken from S3 and S4.
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DAC Differential Outputs
Transformers T2 and T3 should be in place. Note that the lower
band of operation for these transformers is 300 kHz to 500 kHz.
Jumper 4, Jumper 8, Jumper 13 to Jumper 17, and Jumper 28 to
Jumper 30 should remain unsoldered. The outputs are taken
from S3 and S4.
Using the AD8345
Remove Transformers T2 and T3. Jumper JP4 and Jumper 28 to
Jumper 30 should remain unsoldered. Jumper 13 to Jumper 16
should be soldered. The desired components for the low-pass
interface filter L6, L7, C55, and C81 should be in place. The LO
drive is connected to the AD8345 via J10 and the balun T4, and
the AD8345 output is taken from J9.