
Figure 4. Phase-Locked Loop Using External Phase Detector
High-Frequency Waveform Generator
MAX038
GND
COSC
12
A0
V-
18
11
9
26
GND GND
15
DGND
GND GND
5
8
10
7
1
13
3
FADJ
IIN
DADJ
REF
R2
CW
R3
OUT
PDI
PDO
V+
17
DV+
16
20
+5V
-5V
C2
1
μF
1
μF
C1
CENTER
FREQUENCY
50
Ω
R1
R6
GAIN
R5
OFFSET
R4
PHASE DETECTOR
EXTERNAL
OSC INPUT
C4
CAPTURE
19
RF
OUTPUT
A1
4
SYNC
14
+N
Figure 5. Phase-Locked Loop Using External Frequency Phase Detector
MAX038
GND
COSC
12
A0
V-
18
11
9
26
GND GND
15
DGND
GND GND
5
8
10
7
1
13
3
FADJ
IIN
DADJ
REF
R2
CW
R3
OUT
PDI
PDO
V+
17
DV+
16
20
+5V
-5V
C2
1
μF
C1
1
μF
CENTER
FREQUENCY
50
Ω
R1
R6
GAIN
R5
OFFSET
R4
C4
CAPTURE
19
RF
OUTPUT
A1
4
SYNC
14
FREQUENCY
EXTERNAL
OSC INPUT
+N
MAX038
14
Maxim Integrated