–15–

AD9832

REV. A

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.

C1

0.1 F

DVDD

AVDD

C2

0.1 F

415

DVDD

AVDD

16

2

3

1

14

COMP

REFIN

REFOUT

FSADJUST

IOUT

AVDD

C3

10nF

REFIN

C4

10nF

LK4

R5

3.9k

Ω

IOUT

C8

10 F

C7

0.1 F

DVDD

J2

J3

C9

0.1 F

C10

10 F

AVDD

R6

300

Ω

DGND

AGND

513

11

12

10

6

9

8

7

MCLK

FSELECT

PSEL0

PSEL1

FSYNC

SDATA

SCLK

16

14

9

20

11

6

4

DVDD

C6

0.1 F

110 19

U2

J1

SCLK

SDATA

FSYNC

R3

10k

Ω

R1

10k

Ω

R2

10k

Ω

PSEL1

PSEL0

FSELECT

LK1

LK2

LK3

SW

DVDD

MCLK

R4

50

Ω

DGND

DVDD

OUT

DVDD

C5

0.1 F

U3

SCLK

SDATA

FSYNC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

U1

AD9832

XTAL1

Figure 31. AD9832 Evaluation Board Layout

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.

Integrated Circuits

XTAL1

OSC XTAL 25 MHz

U1

AD9832 (16-Pin TSSOP)

U2

74HCT244 Buffer

Capacitors

C1, C2

0.1

µF Ceramic Chip Capacitor

C3, C4

10 nF Ceramic Capacitor

C5, C6, C7, C9

0.1

µF Ceramic Capacitor

C8, C10

10

µF Tantalum Capacitor

Resistors

R1–R3

10 k

Ω Resistor

R4

50

Ω Resistor

R5

3.9 k

Ω Resistor

R6

300

Ω Resistor

Links

LK1–LK3

Three-Pin Link

LK4

Two-Pin Link

Switch

SW

End Stackable Switch (SDC Double

Throw)

Sockets

MCLK, PSEL0,

Subminiature BNC Connector

PSEL1, FSELECT,

IOUT, REFIN

Connectors

J1

36-Pin Edge Connector

J2, J3

PCB Mounting Terminal Block