DAC5687IPZP datasheet(65/72 Pages) TI

tên linh kiện	DAC5687IPZP

Giải thích chi tiết về linh kiện	16-BIT, 500 MSPS 2x-8x INTERPOLATING DUAL-CHANNEL DIGITAL-TO-ANALOG CONVERTER (DAC)

PDF	72 Pages

Scroll/Zoom	100%

nhà sản xuất	TI [Texas Instruments]

Trang chủ	http://www.ti.com

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B0041-01

1, −1, 1, ...

DAC

Ch2

Ch1

Processing

TRF3750

GC4116

GC5016

GC5316

DUC

DAC5687

CDC7005

1, −1, 1, ...

DUC

DAC

Processing

Application Example: Complex IF to RF Conversion Radio

B0042-01

DAC

Processing

TRF3750

DAC5687

CDC7005

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:

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