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DAC5687IPZP датащи(PDF) 65 Page - Texas Instruments

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номер детали DAC5687IPZP
подробное описание детали  16-BIT, 500 MSPS 2x-8x INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG CONVERTER (DAC)
PDF  72 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

DAC5687IPZP датащи(HTML) 65 Page - Texas Instruments

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B0041-01
y2
1, −1, 1, ...
DAC
Ch2
Ch1
RF
Processing
TRF3750
GC4116
GC5016
GC5316
DUC
DAC5687
CDC7005
y2
y2
y2
1, −1, 1, ...
DUC
DUC
DUC
DAC
RF
Processing
Application Example: Complex IF to RF Conversion Radio
B0042-01
y2
DAC
I
Q
RF
Processing
TRF3750
DAC5687
CDC7005
y2
y2
y2
DAC
NCO
CMIX
TRF3701
TRF3702
DAC5687
SLWS164B – FEBRUARY 2005 – REVISED JUNE 2005
Figure 74. System Diagram of a Dual Channel Real IF Radio
The outputs of multiple DAC5687s can be phase synchronized for multiple antenna/beamforming applications.
An alternative to a real IF system is to use a complex IF DAC output with analog quadrature modulator, as
shown in Figure 75. The same complex baseband input as the real IF system in Figure 73 is used. The
DAC5687 would be used to increase the data rate through interpolation and flexibly place the output signal using
the FMIX and/or CMIX blocks. Although the DAC5687 X4 mode is shown, any of the modes (x2, x4L, or x8)
would be appropriate.
Figure 75. Complex IF System Using the DAC5687 in X4L Mode
Instead of only using one DAC5687 output as for the real IF output, both DAC5687 outputs are used for a
complex IF Hilbert transform pair.
The DAC5687 outputs can be expressed as:
65



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