July 2005
P2781/82/84
rev 1.5
Loop Filter Selection Table VDD 3.3V
Contact Alliance for loop values that are not listed in the table and for component
selection values for industrial and automotive temperatures.
BW = ±0.50%1
C2
BW = ±0.75%1
C2
BW = ±1.00%1
C2
BW = ±1.25%1
C2 R1
Input
MHz
FS1 FS0
C1
(pF)
R1
C1
R1
C1
R1
C1
(pF)
(pF)
(ohm) (pF)
(pF)
(ohm) (pF)
(pF)
(ohm)
(pF)
(ohm)
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
270 330,000 220
270 100,000 270
270 100,000 390
270 100,000 510
270 100,000 620
270 100,000 820
270 330,000 300
270 100,000 390
270 100,000 560
270 100,000 750
270 100,000 1,000 270
270 100,000 1,200 270
270 100,000
270 100,000
270 100,000
390
560
750
1,000
1,200
2,200
2,200
750
560
560
560
680
330
680
270
560
100,000
100,000
100,000
6,800
3,300
6,800
510
680
910
270
10,000
5,600
1,200
1,200
2,200
2,200
910
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
910
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
910
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
12,000
5,600
270 100,000
270 100,000 1,000 270 100,000 1,500 270
2,700
270 100,000 330
270 100,000 390
270 100,000 510
270 100,000 560
270 100,000 620
270 100,000 750
270 100,000 820
270 100,000 910
270 100,000 510
270 100,000 560
270 100,000 750
270 100,000 820
270 100,000 1,000 270
270 100,000 1,100 270
270 100,000 1,200 270
270 100,000 1,300 270
100,000
100,000
6,800
4,700
3,300
3,300
6,800
3,900
2,700
270 100,000 866(1%) 560
270
270
10,000
12,000
5,600
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
750
680
470
330
330
680
390
270
270
560
3,900
12,000
10,000
5,600
270 100,000 1,000 270 100,000 1,500 270
270 100,000 1,200 270 100,000 1,600 270
19
20
3,300
270 100,000
270 100,000 866 (1%) 560
2,700
270 100,000 330
270 100,000 390
270 100,000 510
270 100,000 560
270 100,000 620
270 100,000 750
270 100,000 820
270 100,000 910
270 100,000 560
270 100,000 620
270 100,000 750
270 100,000 820
270 100,000 1,000 270
270 100,000 1,100 270
270 100,000 1,200 270
270 100,000 1,300 270
100,000
100,000
6,800
4,700
3,300
3,300
6,800
3,900
2,700
21-22
23-24
25-26
27-28
29-30
31-32
33-34
35-36
37-38
39-42
43-46
47-50
51-54
55-58
59-62
63-66
67-70
71-74
75-78
270
270
10,000
12,000
6,800
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
750
680
470
330
330
680
390
270
270
560
3,900
12,000
10,000
5,600
270 100,000 1,000 270 100,000 1,500 270
270 100,000 1,200 270 100,000 1,600 270
3,300
270 100,000
270 100,000 866 (1%) 560
2,700
270 100,000 330
270 100,000 390
270 100,000 510
270 100,000 560
270 100,000 620
270 100,000 750
270 100,000 820
270 100,000 910
270 100,000 560
270 100,000 620
270 100,000 750
270 100,000 820
270 100,000 1,000 270
270 100,000 1,100 270
270 100,000 1,200 270
270 100,000 1,300 270
100,000
100,000
6,800
4,700
3,300
3,300
6,800
3,900
2,700
270
270
10,000
12,000
6,800
3,900
12,000
8,200
5,600
3,300
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
680
470
330
330
680
390
270
270
270 100,000 1,000 270 100,000 1,600 270
270 100,000 1,200 270 100,000 1,800 270
2,700
1 The BW value is representative of typical conditions
General Purpose EMI Reduction IC
3 of 11
Notice: The information in this document is subject to change without notice.
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
