Datasheet

15
FIGURE 24. HC4046A TYPICAL CHANGE IN VCO FREQUENCY
vs AMBIENT TEMPERATURE AS A FUNCTION OF
R1 (V
CC
= 4.5V)
FIGURE 25. HC4046A TYPICAL CHANGE IN VCO FREQUENCY
vs AMBIENT TEMPERATURE AS A FUNCTION OF
R1 (V
CC
= 6V)
FIGURE 26. HCT4046A TYPICAL CHANGE IN VCO
FREQUENCY vs AMBIENT TEMPERATURE AS A
FUNCTION OF R1
FIGURE 27. HC4046A TYPICAL CHANGE IN VCO FREQUENCY
vs AMBIENT TEMPERATURE AS A FUNCTION OF
R1 (V
CC
= 4.5V)
FIGURE 28. HC4046A OFFSET FREQUENCY vs R2, C1
(V
CC
= 4.5V)
FIGURE 29. HC4046A OFFSET FREQUENCY vs R2, C1
(V
CC
= 3V)
Typical Performance Curves (Continued)
R1 = 2.2M
R1 = 220K
R1 = 2.2K
VCO
IN
= 0.5 V
CC
C1 = 50pF, V
CC
= 4.5V
R2 = OPEN
16
12
8
4
0
VCO FREQUENCY CHANGE, ∆f (%)
20
-75 -50 -25 0 25 50 75
AMBIENT TEMPERATURE, T
A
(
o
C)
100 125 150
-4
-8
-12
R1 = 3M
R1 = 300K
R1 = 3K
VCO
IN
= 0.5 V
CC
C1 = 50pF, V
CC
= 6.0V
R2 = OPEN
16
12
8
4
0
VCO FREQUENCY CHANGE, ∆f (%)
-75 -50 -25 0 25 50 75
AMBIENT TEMPERATURE, T
A
(
o
C)
100 125 150
-4
-8
-12
R1 = 3M
R1 = 300K
R1 = 3K
VCO
IN
= 0.5 V
CC
C1 = 50pF, V
CC
= 5.5V
R2 = OPEN
16
12
8
4
0
VCO FREQUENCY CHANGE, ∆f (%)
20
-75 -50 -25 0 25 50 75
AMBIENT TEMPERATURE, T
A
(
o
C)
100 125 150
-4
-8
-12
R1 = 2.2M
R1 = 220K
R1 = 2.2K
VCO
IN
= 0.5 V
CC
C1 = 50pF, V
CC
= 4.5V
R2 = OPEN
16
12
8
4
0
VCO FREQUENCY CHANGE, ∆f (%)
20
-75 -50 -25 0 25 50 75
AMBIENT TEMPERATURE, T
A
(
o
C)
100 125 150
-4
-8
-12
R2 = 2.2K
R2 = 22K
R2 = 220K
VCO
IN
= 0.5 V
CC
V
CC
= 4.5V
110
10
2
10
3
10
4
10
5
10
6
CAPACITANCE, C1 (pF)
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
OFFSET FREQUENCY (Hz)
R2 = 2.2M
R2 = 11M
VCO
IN
= 0.5 V
CC
V
CC
= 3V
110
10
2
10
3
10
4
10
5
10
6
CAPACITANCE, C1 (pF)
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
OFFSET FREQUENCY (Hz)
R2 = 1.5K
R2 = 15K
R2 = 150K
R2 = 1.5M
R2 = 7.5M
CD74HC4046A, CD74HCT4046A