MC74HC4046A Datasheet, PDF (11/15 Pages) ON Semiconductor – Phase-Locked Loop

MC74HC4046A
23
21
VCC = 6.0 V
19
17
VCC = 4.5 V
15
13
11
VCC = 3.0 V
9
R1 = 3.0 kΩ
C1 = 39 pF
7.0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
VVCOIN (V)
Figure 14A. VCO Frequency (fVCO) as a Function
of the VCO Input Voltage (VVCOIN)
2.0
VCC = 4.5 V
VCC = 3.0 V
VCC = 6.0 V
1.0
R1 = 300 kΩ
C1 = 39 pF
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VVCOIN (V)
Figure 14C. VCO Frequency (fVCO) as a Function
of the VCO Input Voltage (VVCOIN)
2.0
VCC=
4.5 V
1.0
6.0 V
3.0 V
0
4.5 V
6.0 V
–1.0
3.0 V
–2.0 ₁₀₀
C1 = 1.0 µF
C1 = 39 pF
101
R1 (kΩ)
R2 = ∞; ∆V = 0.5 V
102
103
Figure 15A. Frequency Linearity versus
R1, C1 and VCC
70
VCC = 4.5 V ^{VCC = 6.0 V}
60
50
VCC = 3.0 V
40
30
20
10
0
0
R1 = 3.0 kΩ
C1 = 0.1 µF
0.5 1.0 1.5 2.0 2.5 3.0
VVCOIN (V)
3.5 4.0
Figure 14B. VCO Frequency (fVCO) as a Function
of the VCO Input Voltage (VVCOIN)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
VCC = 6.0 V
VCC = 4.5 V
VCC = 3.0 V
R1 = 300 kΩ
C1 = 0.1 µF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VVCOIN (V)
Figure 14D. VCO Frequency (fVCO) as a Function
of the VCO Input Voltage (VVCOIN)
f2
f0
f0′
f1
MIN
1/2 VCC
MAX
∆V = 0.5 V OVER THE VCC RANGE:
FOR VCO LINEARITY
f0′ = (f1 + f2) / 2
LINEARITY = (f0′ – f0) / f0′) x 100%
Figure 15B. Definition of VCO Frequency Linearity
High–Speed CMOS Logic Data
DL129 — Rev 6
3–11
MOTOROLA