A2181A-08TT Alliance Semiconductor, A2181A-08TT Datasheet - Page 3

• Manufacturer Part Number: A2181A-08TT
• Description: 3.3 V, 3 MHz to 78 MHz, general purpose EMI reduction IC
• Manufacturer: Alliance Semiconductor

October 2003
rev 1.0
Loop Filter Selection Table VDD 3.3V
1 The BW value is representative of typical conditions
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
Input
MHz
10
11
12
13
14
15
16
17
18
19
20
3
4
5
6
7
8
9
FS1 FS0
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
(pF)
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
C1
BW = ±0.50%
330,000
100,000
100,000
100,000
100,000
100,000
100,000 1,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,200
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,200
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,200
(pF)
C2
Notice: The information in this document is subject to change without notice.
(ohm)
1
220
270
390
510
620
820
330
390
510
560
620
750
820
910
330
390
510
560
620
750
820
910
330
390
510
560
620
750
820
910
R1
Contact Alliance for loop values that are not listed in the table and for
component selection values for industrial and automotive temperatures.
(pF)
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
C1
General Purpose EMI Reduction IC
BW = ±0.75%
330,000
100,000
100,000
100,000
100,000 1,000
100,000 1,200
100,000 1,500
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,100
100,000 1,200
100,000 1,300
100,000 1,500
100,000 1,600
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,100
100,000 1,200
100,000 1,300
100,000 1,500
100,000 1,600
100,000
100,000
100,000
100,000
100,000 1,000
100,000 1,100
100,000 1,200
100,000 1,300
100,000 1,600
100,000 1,800
(pF)
C2
(ohm)
1
300
390
560
750
510
560
750
820
560
620
750
820
560
620
750
820
R1
(pF)
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
C1
BW = ±1.00%
100,000
100,000
100,000
100,000
100,000 866(1%)
100,000
100,000 866 (1%)
100,000
100,000 866 (1%)
10,000
12,000
10,000
12,000
12,000
10,000
10,000
12,000
12,000
10,000
10,000
12,000
12,000
5,600
5,600
5,600
3,900
5,600
3,300
6,800
3,900
5,600
3,300
6,800
3,900
8,200
5,600
3,300
(pF)
C2
(ohm)
1,000
1,200
2,200
2,200
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
1,000
1,200
1,200
1,200
2,200
2,200
2,200
2,200
1
390
560
750
750
750
750
R1
(pF)
560
560
560
680
330
680
270
560
560
680
470
330
330
680
390
270
270
560
560
680
470
330
330
680
390
270
270
560
560
680
470
330
330
680
390
270
270
C1
BW = ±1.25%
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
6,800
3,300
6,800
2,700
6,800
4,700
3,300
3,300
6,800
3,900
2,700
2,700
6,800
4,700
3,300
3,300
6,800
3,900
2,700
2,700
6,800
4,700
3,300
3,300
6,800
3,900
2,700
2,700
(pF)
C2
P2781/82/84
1
(ohm)
3 of 9
1,200
1,200
2,200
2,200
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
1,100
1,200
1,200
1,200
1,500
2,200
2,200
2,200
2,700
510
680
910
910
910
910
R1