AD9834 Analog Devices, AD9834 Datasheet - Page 19

• Manufacturer Part Number: AD9834
• Description: +2.5V to +5.5V, 50MHz, Low Power (25mW) Complete DDS With on Board Comparator in 20-pin Tssop Package
• Manufacturer: Analog Devices

Integrated Circuits
U 3
U 1
U 2
Capacitors
C1 C2 C5 C6 C7 C9 C14
C3 C4 C13
C8 C10
C11 C12 C15 C16
Resistors
R1 R2
R3
R4
R5 R6
R7
REV PrL
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
RESET
SCLK
SDATA
FSYNC
PSELECT
SW
MCLK
R3
OSC XTAL 50 MHz
AD9834BRU
74HCT244
10 K
51
6.8 k
200
300
50R
FSELECT
Resistor
0.1 F
DVDD
Resistor
Resistor
Resistor
Resistor
C5
PRELIMINARY TECHNICAL DATA
R1
10K
FSYNC
RESET
SDATA
J1
SCLK
10nF ceramic Capacitor
Option for extra
decoupling capacitors
DVDD
100nF Ceramic Capacitor
R2
10K
10uF Tantalum Capacitor
14
DVDD
DGND
7
U3
LK2
OUT
DVDD
0.1 F
LK3
C6
Figure 15. AD9834 Evaluation Board Layout
8
2
4
6
8
LK1
U2
1
12
18
16
14
C13
0.01 F
C14
0.01 F
11
10
14
13
15
9
8
RESET
CAP
PSELECT
FSELECT
MCLK
LK4
SCLK
SDATA
FSYNC
DVDD
6
–19–
DGND
7
C1
0.1 F
Links
Lk1 Lk2 Lk5
Lk3 Lk4
Switch
S W
Sockets
PSEL1;
IOUT;
Connectors
J 1
J2, J3
AD9834
DVDD AVDD
U1
5
AGND
SIGNBITOUT
FSADJUST
18
4
IOUTB;
REFOUT
FSEL1;
SLEEP
IOUTB
COMP
C2
0.1 F
IOUT
VIN 17
AVDD
3
2
12
1
20
19
16
C11
6.8k
CLK1;
C4
SBOUT; Connector
R4
AVDD
C11
0.1 F
300R
R7
C3
10nF
SBOUT
10 F
200R
C8
3 pin sil header
2 pin sil header
End Stackable Switch (SDC
Double Throw)
36-Pin Edge Connector
Block
Sub Minature BNC
PCB Mounting Terminal
DVDD
R5
LK5
DVDD
C7
0.1 F
C11
IOUT
J2 J3
200R
R6
AD9834
0.1 F
C9
A VDD
C12
IOUTB
C10
10 F