参数资料
型号: CD74HC7046AEE4
厂商: TEXAS INSTRUMENTS INC
元件分类: XO, clock
英文描述: PHASE LOCKED LOOP, PDIP16
封装: ROHS COMPLIANT, PLASTIC, MS-001BB, DIP-16
文件页数: 9/29页
文件大小: 485K
代理商: CD74HC7046AEE4
17
FIGURE 32. HC7046A AND HCT7046A OFFSET FREQUENCY
vs R2, C1
FIGURE 33. HC7046A fMIN/fMAX vs R2/R1
FIGURE 34. HCT7046A fMAX/fMIN vs R2/R1
FIGURE 35. DEFINITION OF VCO FREQUENCY LINEARITY
FIGURE 36. HC7046A VCO LINEARITY vs R1
FIGURE 37. HC7046A VCO LINEARITY vs R1
Typical Performance Curves (Continued)
110
102
103
104
105
106
CAPACITANCE, C1 (pF)
108
107
106
105
104
103
102
10
1
OFFSET
FREQ
UENCY
(Hz)
R2 = 3K
R2 = 30K
R2 = 300K
R2 = 3M
R2 = 15M
VCOIN = GND
HC - VCC = 6V
HCT - VCC = 5.5V
VCOIN = VCC - 0.9V FOR fMAX
VCOIN = 0V FOR fMIN
VCC = 3V, 4.5V, 6V
102
10
f MAX
/f
MIN
1
10-2
10-1
1
R2/R1
102
10
VCOIN = VCC - 0.9V FOR fMAX
VCOIN = 0V FOR fMIN
VCC = 4.5V TO 5.5V
102
10
f MAX
/f
MIN
1
10-2
10-1
1
R2/R1
102
10
f
f2
f0
f0’
f1
V
1/2VCC
VVCOIN
MIN
MAX
V
V = 0.5V OVER THE VCC RANGE:
FOR VCO LINEARITY
f’o = f1 + f2
2
LINEARITY =
f’o - fo
f’o
x 100%
1K
10K
100K
1M
10M
R1 (OHMS)
8
6
4
2
0
-2
-4
-6
-8
LINEARITY
(%)
VCOIN = 2.25V ± 1V
C1 = 50pF
VCC = 4.5V
R2 =
VCOIN = 2.25V ± 0.45V
1K
10K
100K
1M
10M
R1 (OHMS)
8
6
4
2
0
-2
-4
-6
-8
LINEARITY
(%)
VCOIN = 1.50V ± 0.4V
C1 = 50pF
VCC = 3V
R2 =
VCOIN = 1.50V ± 0.3V
CD74HC7046A, CD74HCT7046A
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