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| CD74HC4046A Datasheet, PDF (13/28 Pages) Texas Instruments – High-Speed CMOS Logic Phase-Locked Loop with VCO | |||
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CD54HC4046A, CD74HC4046A, CD54HCT4046A, CD74HCT4046A
Typical Performance Curves (Continued)
108
R1 = 2.2K
107
R1 = 22K
R1 = 220K
106
R1 = 2.2M
R1 = 11M
105
104
103
102
10 VCOIN = 0.5 VCC
1 VCC = 4.5V
1
10
102
103
104
CAPACITANCE, C1 (pF)
105
106
FIGURE 11. HC4046A TYPICAL CENTER FREQUENCY vs R1,
C1 (VCC = 4.5V)
108
107
106
105
104
103
102
10 VCOIN = 0.5 VCC
VCC = 6.0V
1
1
10
102
103
104
CAPACITANCE, C1 (pF)
R1 =3K
R1 = 30K
R1 =330K
R1 = 3M
R1 = 15M
105
106
FIGURE 12. HC4046A TYPICAL CENTER FREQUENCY vs R1,
C1 (VCC = 6V)
108
107
106
105
104
103
102 VCOIN = 0.5 VCC
10 VCC = 3.0V
R2 = OPEN
1
1
10
102
103
104
CAPACITANCE, C1 (pF)
R1 = 1.5K
R1 = 15K
R1 = 150K
R1 = 1.5M
R1 = 7.5M
105
106
FIGURE 13. HC4046A TYPICAL CENTER FREQUENCY vs R1,
C1 (VCC = 3V, R2 = OPEN)
108
R1 = 3K
107
R1 = 30K
R1 = 300K
106
R1 = 3M
R1 = 15M
105
104
103
102
10 VCOIN = 0.5 VCC
VCC = 5.5V
1
1
10
102
103
104
105
106
CAPACITANCE, C1 (pF)
FIGURE 15. HCT4046A TYPICAL CENTER FREQUENCY vs R1,
C1 (VCC = 5.5V)
108
R1 = 2.2K
107
R1 = 22K
R1 = 220K
106
R1 = 2.2M
R1 = 11M
105
104
103
102
10 VCOIN = 0.5 VCC
VCC = 4.5V
1
1
10
102
103
104
CAPACITANCE, C1 (pF)
105
106
FIGURE 14. HCT4046A TYPICAL CENTER FREQUENCY vs R1,
C1 (VCC = 4.5V)
140
C1 = 50pF
120 R1 = 1.5M
VCC = 6V
100
VCC = 4.5V
80
60
VCC = 3V
40
20
0
1
2
3
4
5
6
VCOIN (V)
FIGURE 16. HC4046A TYPICAL VCO FREQUENCY vs VCOIN
(R1 = 1.5Mâ¦, C1 = 50pF)
13
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