MAX038CPP Datasheet, PDF (7/16 Pages) Maxim Integrated Products – High-Frequency Waveform Generator

High-Frequency Waveform Generator
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, V+ = DV+ = 5V, V- = -5V, V_DADJ = V_FADJ = V_PDI = V_PDO = 0V, R_L = 1kΩ, C_L = 20pF, T_A = +25°C, unless
otherwise noted.)
OUTPUT SPECTRUM, SINE WAVE
(F_o = 11.5MHz)
0
R_IN = 15kΩ (V_IN = 2.5V), C_F = 20pF,
-10 _{VDADJ = 40mV, VFADJ = -3V}
-20
-30
-40
-50
-60
-70
-80
-90
-100
0 10 20 30 40 50 60 70 80 90 100
FREQUENCY (MHz)
OUTPUT SPECTRUM, SINE WAVE
(F_o = 5.9kHz)
0
R_IN = 51kΩ (V_IN = 2.5V), C_F = 0.01µF,
-10
V_DADJ = 50mV, V_FADJ = 0V
-20
-30
-40
-50
-60
-70
-80
-90
-100
0 5 10 15 20 25 30 35 40 45 50
FREQUENCY (kHz)
______________________________________________________________Pin Description
PIN
1
2, 6, 9,
11, 18
3
4
5
7
8
10
12
13
NAME
REF
GND
A0
A1
COSC
DADJ
FADJ
IIN
PDO
PDI
14
SYNC
15
DGND
16
DV+
17
V+
19
OUT
20
V-
2.50V bandgap voltage reference output
FUNCTION
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
*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 Layout Considerations).
_______________________________________________________________________________________ 7