MAX038 Maxim, MAX038 Datasheet - Page 7

• Manufacturer Part Number: MAX038
• Description: High-Frequency Waveform Generator
• Manufacturer: Maxim

* The five GND pins are not internally connected. Connect all five GND pins to a quiet ground close to the device. A ground plane is
recommended (see
(Circuit of Figure 1, V+ = DV+ = 5V, V- = -5V, V
otherwise noted.)
______________________________________________________________Pin Description
2, 6, 9,
11, 18
____________________________Typical Operating Characteristics (continued)
PIN
10
12
13
14
15
16
17
19
20
1
3
4
5
7
8
NAME
DGND
COSC
SYNC
DADJ
FADJ
GND
PDO
DV+
OUT
REF
PDI
IIN
V+
A0
A1
V-
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
Layout Considerations).
_______________________________________________________________________________________
0
2.50V bandgap voltage reference output
Ground*
Waveform selection input; TTL/CMOS compatible
Waveform selection input; TTL/CMOS compatible
External capacitor connection
Duty-cycle adjust input
Frequency adjust input
Current input for frequency control
Phase detector output. Connect to GND if phase detector is not used.
Phase detector reference clock input. Connect to GND if phase detector is not used.
TTL/CMOS-compatible output, referenced between DGND and DV+. Permits the internal oscillator to be
synchronized with an external signal. Leave open if unused.
Digital ground
Digital +5V supply input. Can be left open if SYNC is not used.
+5V supply input
Sine, square, or triangle output
-5V supply input
R
V
DADJ
IN
10
OUTPUT SPECTRUM, SINE WAVE
= 15k (V
20
= 40mV, V
High-Frequency Waveform Generator
30
FREQUENCY (MHz)
(F
o
IN
40
= 11.5MHz)
= 2.5V), C
FADJ
50
= -3V
60
F
= 20pF,
70
DADJ
80
90
= V
100
FADJ
= V
PDI
= V
FUNCTION
PDO
= 0V, R
-100
-10
-30
-50
-70
-90
-20
-40
-60
-80
0
0
L
OUTPUT SPECTRUM, SINE WAVE
= 1kΩ, C
5
R
V
10
DADJ
IN
= 51k (V
15
FREQUENCY (kHz)
= 50mV, V
(F
L
20
o
= 20pF, T
= 5.9kHz)
IN
25
= 2.5V), C
FADJ
30
= 0V
35
A
F
= +25°C, unless
40
= 0.01 F,
45
50
7