MC74HC4046A
6
10
6
10
C
= 50 pF; R1 = ∞; V
=0 V; T =25°C
amb
C
= 50 pF; R2 = ∞; V
VCOIN
= 1/2 V FOR V = 4.5 V AND 6.0 V;
CC CC
L
VCOIN
L
V
= 1/3 V FOR V = 3.0 V; T =25°C
VCOIN
CC CC amb
5
10
5
10
V
= 6.0 V, C1 = 40 pF
CC
V
= 6.0 V, C1 = 1.0 µF
V
= 6.0 V, C1 = 40 pF
CC
CC
V
= 6.0 V, C1 = 1.0 µF
CC
V
= 4.5 V, C1 = 40 pF
4
10
4
10
CC
V
= 4.5 V, C1 = 1.0 µF
CC
V
= 4.5 V, C1 = 40 pF
CC
= 4.5 V, C1 = 1.0 µF
V
CC
V
= 3.0 V, C1 = 40 pF
CC
V = 3.0 V, C1 = 1.0 µF
CC
V
= 3.0 V, C1 = 1.0 µF
CC
V
= 3.0 V, C1 = 40 pF
CC
3
3
10
10
0
10
1
10
2
10
3
10
0
10
1
10
2
10
3
10
R1 (kΩ)
R2 (kΩ)
Figure 16. Power Dissipation versus R1
Figure 17. Power Dissipation versus R2
8
10
V
=
INH = GND; T
amb
=25°C; R2 = ∞; V
VCOIN
= 1/3 V
CC
CC
3
10
6.0 V
4.5 V
3.0 V
R1 = R2 = ∞; T
amb
=25°C
7
10
6.0 V
4.5 V
3.0 V
6.0 V
4.5 V
3.0 V
6
10
2
10
5
10
V
=6.0 V
=4.5 V
CC
R1=3.0 kΩ
V
CC
4
10
1
10
R1=100 kΩ
R1=300 kΩ
V =3.0 V
CC
3
10
0
10
2
10
1
10
2
3
10
10
R (kΩ)
1
10
2
10
3
10
4
10
5
10
6
10
S
C1 (pF)
Figure 19. VCO Center Frequency versus C1
Figure 18. DC Power Dissipation of
Demodulator versus R
S
8
8
10
10
V
=
R1 = ∞; V
VCOIN
= 1/2 V FOR V = 4.5 V AND 6.0 V;
CC CC
CC
6.0 V
4.5 V
3.0 V
V
= 1/3 V FOR V = 3.0 V; INH = GND; T
=25°C
VCOIN
CC
CC
amb
7
10
V
CC
= 4.5 V; R2 = ∞
7
10
6.0 V
4.5 V
3.0 V
6
10
6
10
6.0 V
4.5 V
3.0 V
5
10
5
10
4
10
R2=3.0 kΩ
4
10
3
10
R2=100 kΩ
R2=300 kΩ
3
10
2
10
1
10
2
10
1
10
2
10
3
10
4
10
5
10
6
10
–7
10
–6
10
10–5
–4
10
–3
10
–2
10
–1
10
C1 (pF)
R1C1
Figure 20. Frequency Offset versus C1
Figure 21. Typical Frequency Lock Range (2f )
L
versus R C
1 1
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