MC74HC4046A_14 Datasheet, PDF (10/15 Pages) ON Semiconductor – Phase-Locked Loop

MC74HC4046A
23
21
V_CC = 6.0 V
19
17
V_CC = 4.5 V
15
13
11
V_CC = 3.0 V
9
R1 = 3.0 kW
C1 = 39 pF
7.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
V_VCOIN (V)
Figure 14A. VCO Frequency (f_VCO) as a Function
of the VCO Input Voltage (V_VCOIN)
70
V_CC = 4.5 V
V_CC = 6.0 V
60
50
V_CC = 3.0 V
40
30
20
10
R1 = 3.0 kW
C1 = 0.1 mF
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5 4.0
V_VCOIN (V)
Figure 14B. VCO Frequency (f_VCO) as a Function
of the VCO Input Voltage (V_VCOIN)
2.0
V_CC = 4.5 V
V_CC = 3.0 V
V_CC = 6.0 V
1.0
R1 = 300 kW
C1 = 39 pF
0
0
0.5 1.0
1.5 2.0 2.5
3.0 3.5
4.0 4.5
V_VCOIN (V)
Figure 14C. VCO Frequency (f_VCO) as a Function
of the VCO Input Voltage (V_VCOIN)
1.0
0.9
V_CC = 6.0 V
0.8
V_CC = 4.5 V
0.7
0.6
V_CC = 3.0 V
0.5
0.4
0.3
0.2
0.1
0
0
R1 = 300 kW
C1 = 0.1 mF
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_VCOIN (V)
Figure 14D. VCO Frequency (f_VCO) as a Function
of the VCO Input Voltage (V_VCOIN)
2.0
V_CC=
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 mF
C1 = 39 pF
10¹
R1 (kW)
R2 = ∞; DV = 0.5 V
10²
10³
Figure 15A. Frequency Linearity versus
R1, C1 and V_CC
f₂
f₀
f₀′
f₁
MIN
1/2 V_CC
MAX
DV = 0.5 V OVER THE V_CC RANGE:
FOR VCO LINEARITY
f₀′ = (f₁ + f₂) / 2
LINEARITY = (f₀′ - f₀) / f₀′) x 100%
Figure 15B. Definition of VCO Frequency Linearity
http://onsemi.com
10