AD9833 datasheet(21/24 Pages) AD

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Data Sheet

AD9833

Rev. E | Page 21 of 24

EVALUATION BOARD

The AD9833 evaluation board allows designers to evaluate the

high performance AD9833 DDS modulator with a minimum

of effort.

SYSTEM DEMONSTRATION PLATFORM

The system demonstration platform (SDP) is a hardware and

software evaluation tool for use in conjunction with product

evaluation boards. The SDP board is based on the Blackfin®

ADSP-BF527 processor with USB connectivity to the PC

through a USB 2.0 high speed port. For more information

about the SDP board, see the SDP board product page.

Note that the SDP board is sold separately from the AD9833

evaluation board.

AD9833 TO SPORT INTERFACE

The Analog Devices SDP board has a SPORT serial port that is

used to control the serial inputs to the AD9833. The connections

are shown in Figure 32.

AD9833

FSYNC

SDATA

SCLK

SPORT_TFS

SPORT_TSCLK

SPORT_DTO

ADSP-BF527

Figure 32. SDP to AD9833 Interface

EVALUATION KIT

The DDS evaluation kit includes a populated, tested AD9833

printed circuit board (PCB). The schematics of the evaluation

board are shown in Figure 34 and Figure 35.

The software provided in the evaluation kit allows the user to

easily program the AD9833 (see Figure 33). The evaluation soft-

ware runs on any IBM-compatible PC with Microsoft® Windows®

software installed (including Windows 7). The software is com-

patible with both 32-bit and 64-bit operating systems.

More information about the evaluation software is available on

the software CD and on the AD9833 product page.

Figure 33. AD9833 Evaluation Software Interface

CRYSTAL OSCILLATOR VS. EXTERNAL CLOCK

The AD9833 can operate with master clocks up to 25 MHz.

A 25 MHz oscillator is included on the evaluation board. This

oscillator can be removed and, if required, an external CMOS

clock can be connected to the part. Options for the general

oscillator include the following:

•

AEL 301-Series oscillators, AEL Crystals

•

SG-310SCN oscillators, Epson Electronics

POWER SUPPLY

Power to the AD9833 evaluation board can be provided from

the USB connector or externally through pin connections. The

power leads should be twisted to reduce ground loops.

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