MC74HC4046A_14 Datasheet, PDF (9/15 Pages) ON Semiconductor – Phase-Locked Loop

MC74HC4046A
800
V_CC=3.0 V
400
V_CC=4.5 V
V_CC=6.0 V
0
1/2 V_CC-1.0 V
1/2 V_CC
VI (V)
1/2 V_CC+1.0 V
Figure 10. Input Resistance at SIG_IN, COMP_IN with
DV_I = 1.0 V at Self−Bias Point
DEMOD OUT
6.0
V_CC=6.0 V R_S=300 k
V_CC=6.0 V R_S=50 k
V_CC=4.5 V R_S=300 k
V_CC=4.5 V R_S=50 k
V_CC=3.0 V R_S=300 k
V_CC=3.0 V R_S=50 k
0
0
3.0
6.0
VCO_IN (V)
Figure 12. Offset Voltage at Demodulator Output as
a Function of VCO_IN and R_S
V_CC=6.0 V
4.0
V_CC=4.5 V
V_CC=3.0 V
0
-4.0
1/2V_CC - 500 mV
1/2 V_CC
V_I (V)
1/2 V_CC + 500 mV
Figure 11. Input Current at SIG_IN, COMP_IN with
DV_I = 500 mV at Self−Bias Point
15
10
5.0
0 ^{R1=100 kW}
-5.0 ^{R1=300 kW}
R1=3.0 kW
R1=100 kW
R1=300 kW
-10
R1=3.0 kW
-15
-100
-50
V_CC = 3.0 V
C1 = 100 pF; R2 = ∞; V_VCOIN=1/3 V_CC
0
50
100
150
AMBIENT TEMPERATURE (°C)
Figure 13A. Frequency Stability versus Ambient
Temperature: V_CC = 3.0 V
15
R1=3.0 kW
10
R1=300 kW
R1=100 kW
5.0
0
-5.0
-10
-15
-100
V_CC = 4.5 V
C1 = 100 pF; R2 = ∞; V_VCOIN = 1/2 V_CC
-50
0
50
100
150
AMBIENT TEMPERATURE (°C)
Figure 13B. Frequency Stability versus Ambient
Temperature: V_CC = 4.5 V
10
8.0
6.0
4.0
2.0
0
-2.0
-4.0
-6.0
-8.0
-10
-100
R1=3.0 kW
R1=300 kW
R1=100 kW
V_CC = 6.0 V
C1 = 100 pF; R2 = ∞; V_VCOIN=1/2 V_CC
-50
0
50
100
150
AMBIENT TEMPERATURE (°C)
Figure 13C. Frequency Stability versus Ambient
Temperature: V_CC = 6.0 V
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