AD9832(RevA) 데이터 시트보기 (PDF) - Analog Devices

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AD9832
(Rev.:RevA)

CMOS Complete DDS

Analog Devices 

AD9832

Using the AD9832 Evaluation Board

The AD9832 Evaluation kit is a test system designed to simplify

the evaluation of the AD9832. Provisions to control the AD9832

from the printer port of an IBM-compatible PC are included,

along with the necessary software. An application note is also

available with the evaluation board and gives information on

operating the evaluation board.

Prototyping Area

An area is available on the evaluation board for the user to add

additional circuits to the evaluation test set. Users may want to

build custom analog filters for the output or add buffers and

operational amplifiers to be used in the final application.

XO vs. External Clock

The AD9832 can operate with master clocks up to 25 MHz. A

25 MHz oscillator is included on the evaluation board. How-

ever, this oscillator can be removed and, if required, an external

CMOS clock connected to the part.

Power Supply

Power to the AD9832 Evaluation Board must be provided ex-

ternally through the pin connections. The power leads should be

twisted to reduce ground loops.

1

2

SCLK

3 SDATA

4 FSYNC

5

6

7

8

9

10

11

12

13

14

15

16

PSEL1

17

18

19

PSEL0

20

21

22

23

24

25

26

SW

27

28

29

30

MCLK

31

32

33

34

35

36

J1

SCLK

SDATA

FSYNC

DVDD

C6

0.1␮F

4

6

11

20

16

14

9

1 10 19

U2

R2 R1

R3

10kΩ 10kΩ 10kΩ

FSELECT

LK1

LK2

LK3

DVDD

R4 DVDD

50Ω

C5

0.1␮F

DVDD

U3

OUT

XTAL1

DGND

DVDD

C1

0.1␮F

7

SCLK

8

SDATA

9

FSYNC

4

DVDD

15

AVDD

AVDD

C2

0.1␮F

16

COMP

2

REFIN

AVDD

C3

10nF

REFIN

LK4

3

REFOUT

C4

10nF

J2

DVDD

1

FSADJUST

U1

AD9832

C8

10␮F

R5

3.9kΩ

C7

0.1␮F

11

PSEL1

12

PSEL0

10

FSELECT

6

MCLK

DGND

5

14

IOUT

AGND

13

R6

300Ω

IOUT

J3

AVDD

C9

0.1␮F

C10

10␮F

Figure 31. AD9832 Evaluation Board Layout

Integrated Circuits

XTAL1

U1

U2

Capacitors

C1, C2

C3, C4

C5, C6, C7, C9

C8, C10

Resistors

R1–R3

R4

R5

R6

REV. A

OSC XTAL 25 MHz

AD9832 (16-Pin TSSOP)

74HCT244 Buffer

0.1 µF Ceramic Chip Capacitor

10 nF Ceramic Capacitor

0.1 µF Ceramic Capacitor

10 µF Tantalum Capacitor

10 kΩ Resistor

50 Ω Resistor

3.9 kΩ Resistor

300 Ω Resistor

Links

LK1–LK3

LK4

Switch

SW

Sockets

MCLK, PSEL0,

PSEL1, FSELECT,

IOUT, REFIN

Connectors

J1

J2, J3

–15–

Three-Pin Link

Two-Pin Link

End Stackable Switch (SDC Double

Throw)

Subminiature BNC Connector

36-Pin Edge Connector

PCB Mounting Terminal Block

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