MC12079
ELECTRICAL CHARACTERISTICS (V
Parameter
= 4.5 to 5.5 V; T = –40 to 85°C, unless otherwise noted.)
CC
A
Symbol
Min
0.25
–
Typ
3.4
9.0
Max
2.8
Unit
GHz
mA
Toggle Frequency (Sine Wave)
Supply Current Output (Pin 2)
Input Voltage Sensitivity
ft
I
11.5
CC
250–500 MHz
500–2800 MHz
V
in
400
100
–
–
1000
1000
mVpp
Divide Ratio Control Input High (SW)
Divide Ratio Control Input Low (SW)
Output Voltage Swing
V
V
V
V
CC
V
–
IH
CC
CC
V
Open
1.0
Open
Open
–
IL
V
out
1.6
V
pp
1
2
3
(C = 12 pF; R = 1.2 kΩ; I = 2.7 mA)
L
L
L
L
O
O
O
(C = 12 pF; R = 2.2 kΩ; I = 1.5 mA)
L
(C = 12 pF; R = 3.9 kΩ; I = 0.85 mA)
L
NOTES: 1. Divide ratio of ÷64 at 2.8 GHz.
2. Divide ratio of ÷128 at 2.8 GHz.
3. Divide ratio of ÷256 at 2.8 GHz.
Figure 1. Logic Diagram (MC12079)
D
C
QB
Q
D
C
Q
D
C
QB
Q
In
In
QB
D
C
Q
D
C
QB
Q
QB
D
QB
Q
D
C
QB
Q
D
C
QB
Q
C
Out
SW2
SW1
Figure 2. AC Test Circuit
V
= 4.5 to 5.5 V
CC
C3
SINE WAVE GENERATOR
C1
V
CC
IN
SW1
SW2
OUT
50
Ω
C2
IN
GND
EXTERNAL COMPONENTS
C1 = C2 = 1000 pF
C
L
R
L
C3 = 0.1 µF
C
R
= 12 pF (Including Scope and Jig Capacitance)
L
L
= 1.2 kΩ (for ÷64 at 2.8 GHz)
2
MOTOROLA RF/IF DEVICE DATA
MOTOROLA [ MOTOROLA ]
