CD54HC4046A, CD74HC4046A, CD54HCT4046A, CD74HCT4046A
Typical Performance Curves (Continued)
8
6
C1 = 50pF
= 4.5V
V
CC
R2 = OPEN
4
f
VCO = 2.25V ± 1V
IN
2
f
f
2
0
∆V = 0.5V OVER THE V
FOR VCO LINEARITY
f’ = f + f
RANGE:
VCO = 2.25V ± 0.45V
CC
0
IN
f
0
-2
o
1
2
f
2
1
f’ - f
o
o
-4
-6
-8
LINEARITY =
x 100%
f’
o
∆V
∆V
MIN
MAX
1/2V
CC
1K
10K
100K
R1 (OHMS)
1M
10M
V
VCOIN
FIGURE 33. DEFINITION OF VCO FREQUENCY LINEARITY
FIGURE 34. HC4046A VCO LINEARITY vs R1 (V
= 4.5V)
CC
8
8
C1 = 50pF
C1 = 50pF
V
= 3V
V
= 6V
6
4
CC
R2 = OPEN
6
4
CC
R2 = OPEN
VCO = 3V ± 1.5V
IN
VCO = 1.50V ± 0.4V
IN
2
2
0
0
VCO = 1.50V ± 0.3V
IN
-2
-2
-4
-6
-8
-4
-6
-8
VCO = 3V ± 0.6V
IN
1K
10K
1K
10K
100K
1M
10M
100K
1M
10M
R1 (OHMS)
R1 (OHMS)
FIGURE 35. HC4046A VCO LINEARITY vs R1 (V
= 3V)
FIGURE 36. HC4046A VCO LINEARITY vs R1 (V
= 6V)
CC
CC
8
4
10
V
= 5.5V,
CC
VCO = 2.75V ±1.3V
VCO = 0.5 V
IN
= 4.5V,
IN
CC
6
4
V
CC
VCO = 2.25V ±1.0V
IN
3
2
10
10
V
= 6V
CC
2
0
V
= 3V
CC
V
= 4.5V
-2
V
= 5.5V,
CC
CC
VCO = 2.75V ±0.55V
IN
10
1
V
= 4.5V,
-4
-6
-8
CC
VCO = 2.25V ±0.45V
IN
C1 = 50pF
R2 = OPEN
1K
10K
1K
10K
100K
1M
10M
100K
1M
R1 (OHMS)
RS (OHMS)
FIGURE 37. HCT4046A VCO LINEARITY vs R1 (V
= 4.5V,
FIGURE 38. HC4046A DEMODULATOR POWER DISSIPATION
vs RS (TYP) (V = 3V, 4.5V, 6V)
CC
V
= 5.5V)
CC
CC
17
TI [ TEXAS INSTRUMENTS ]
