MC12100
Figure 2. VCO Detail
±0.75V
Limit
1/2
VCC
OUTPUT FREQUENCY FORMULA
] ) 1) CENTER FREQUENCY : fOSC
660
RX 1.0
(MHz)
RX in kΩ Units: 2.0 kΩ ≤ RX ≤ 2.7 kΩ
] @ ń 2) GAIN : Af
280
VCC RY
(MHz
V)
RY in kΩ Units: 1.0 kΩ ≤ RY ≤ 2.0 kΩ
–
–
40K
+
+
40K
1
VCC1
6
5
VCB
CB
VC
4
3
RY
RX
CF
VCC1
CB = 0.001 µF
CF = 0.1 µF
Notes:
• For optimum VCO linearity (MHz/V), the following resistor ranges are recommended:
2.0 kΩ ≤ RX ≤ 2.7 kΩ (RY = 1.5 kΩ)
1.0 kΩ ≤ RY ≤ 2.0 kΩ (RX = 2.4 kΩ)
• TTL output maximum frequency = 50 MHz
• Simultaneous use of both ECL and TTL outputs are not recommended due to excessive power consumption for the EIAJ Type II
SO package
Figure 3. AC Test Circuit (FO/trE/tfE Measurement)
VCC = +2.0 VDC
Figure 4. AC Test Circuit (Other Measurements)
VCC = +5.0 VDC
RX
9
3
RY
4
0.1 µF
5
6
0.001 µF
1 18 13
0.1 µF
16
17
14
15
7 10 11
RX
3
RY
4
0.1 µF
5
6
VIE
19
VIT
20
1 18 13
0.1 µF
16
17
50 Ω
14
15
50 Ω
12
7 10 11
50 pF
50 Ω
+3.0
V
50 Ω
+3.0V
500 Ω
0.1 µF
VEE = –3.0 VDC
0.1 µF
VEE = GND
4
MOTOROLA RF/IF DEVICE DATA