AD9773BSVRL Analog Devices Inc, AD9773BSVRL Datasheet - Page 48

• Manufacturer Part Number: AD9773BSVRL
• Description: IC,D/A CONVERTER,DUAL,12-BIT,CMOS,TQFP,80PIN
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9773BSVRL

• Rohs Status: RoHS non-compliant
• Settling Time: 11ns
• Number Of Bits: 12
• Data Interface: Serial, SPI™
• 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: AD9773-EBZ - BOARD EVALUATION AD9773

AD9773
EVALUATION BOARD
The AD9773 evaluation board allows easy configuration of the
various modes, programmable via the SPI port. Software is
available for programming the SPI port from 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 AD9773
in an image reject transmit signal chain.
Figure 101 through Figure 104 describe 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 through
Figure 114, the schematics, and the layout for the AD9773
evaluation board for the jumper locations described below. The
AD9773 outputs can be configured for various applications by
referring to the following instructions.
DAC SINGLE-ENDED OUTPUTS
Remove transformers T2 and T3. Solder jumper link JP4 or
JP28 to look at the DAC1 outputs. Solder jumper link JP29 or
JP30 to look at the DAC2 outputs. Jumper 8 and Jumpers 13 to
17 should remain unsoldered. Jumpers JP35 to JP38 may 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.
Jumpers 4, 8, 13 to 17, and 28 to 30 should remain unsoldered.
The outputs are taken from S3 and S4.
USING THE AD8345
Remove Transformers T2 and T3. Jumpers JP4 and Jumpers 28
to 30 should remain unsoldered. Jumpers 13 to 16 should be
soldered. The desired components for the low-pass interface
filters L6, L7, C55, and C81 should be in place. The LO drive is
connected to the AD8345 via J10 and the balun T4; AD8345
output is taken from J9.