參數(shù)資料
型號(hào): FS782
廠商: Cypress Semiconductor Corp.
英文描述: Low EMI Spectrum Spread Clock
中文描述: 低EMI擴(kuò)頻時(shí)鐘頻譜
文件頁(yè)數(shù): 3/12頁(yè)
文件大小: 207K
代理商: FS782
FS781/82/84
Document #: 38-07029 Rev. *E
Page 3 of 12
Table 2. FS781/82/84 Recommended Loop Filter Values
C7 (pF) @ +3.3 VDC ±5% (R6 = 3.3K)
[1, 2, 3, 4]
BW = 1.0%
[3]
BW = 1.5%
[3]
BW = 2.0%
[3]
BW = 2.5%
[3]
BW = 3.0%
[3]
BW = 3.5%
[3]
BW = 4.0%
[3]
6
0
0
10,000/1000
1550
910
8
0
0
10,000/330
990
820
10
0
0
1040
680
460
12
0
0
830
420
300
14
0
0
580
230
200
16
0
1
10000
980
760
18
0
1
1200
750
580
20
0
1
1000
730
470
22
0
1
960
640
410
24
0
1
920
400
250
26
0
1
660
300
220
28
0
1
470
230
180
30
0
1
470
180
140
32
0
1
330
170
120
34
1
0
10000
860
640
36
1
0
2200
820
620
38
1
0
1500
690
520
40
1
0
960
600
420
42
1
0
940
620
380
44
1
0
950
680
400
46
1
0
900
580
270
48
1
0
790
440
260
50
1
0
660
360
250
52
1
0
470
325
220
54
1
0
470
270
200
56
1
0
445
250
185
58
1
0
430
210
165
60
1
0
295
185
150
62
1
0
270
220
150
64
1
1
1180
860
560
65
1
1
1180
850
540
66
1
1
1180
760
560
68
1
1
1180
750
500
70
1
1
1120
740
470
72
1
1
1160
780
470
74
1
1
1110
770
470
76
1
1
1000
720
440
78
1
1
910
670
270
80
1
1
900
620
260
82
1
1
900
540
250
Input MHz
S1
S0
780
640
360
220
160
580
470
390
270
210
180
150
120
100
520
470
410
340
275
250
220
210
190
185
170
150
130
120
120
410
400
350
320
370
300
280
240
210
210
210
700
520
300
200
140
470
415
320
230
180
150
130
100
82
430
400
340
280
230
210
190
180
170
155
140
120
100
100
100
340
330
260
260
300
250
230
210
190
190
190
640
450
240
190
100
410
370
220
200
160
140
100
80
68
380
330
290
220
210
190
180
160
150
135
130
85
65
90
82
290
280
220
230
240
220
210
190
170
170
170
560
400
210
170
80
385
300
190
180
150
120
70
60
47
330
290
240
160
180
170
165
140
140
120
100
47
33
82
68
230
220
210
210
170
190
190
170
160
156
150
Notes:
1. If the value selected from the above chart is not a standard, use the next available larger value.
2. All bandwidths indicated above are total peak-to-peak spread. 1% = +0.5% to –0.5%. 4% = +2.0% to –2.0%.
3. If C8 is not listed in the chart for a particular bandwidth and frequency, it is not used in the loop filter.
4. Contact Cypress for LF values less than 1.0% bandwidth.
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