REFCLK (Pin " />
參數(shù)資料
型號(hào): AD9877ABSZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 7/36頁(yè)
文件大?。?/td> 0K
描述: IC PROCESSOR FRONT END 100MQFP
標(biāo)準(zhǔn)包裝: 1
位數(shù): 12
通道數(shù): 3
功率(瓦特): 1.17W
電壓 - 電源,模擬: 3.3V
電壓 - 電源,數(shù)字: 3.3V
封裝/外殼: 100-BQFP
供應(yīng)商設(shè)備封裝: 100-MQFP(14x20)
包裝: 托盤
AD9877
Rev. B | Page 15 of 36
PROGRAMMABLE CLOCK OUTPUT REFCLK
The AD9877 provides a frequency-programmable clock output
REFCLK (Pin 71). OSCIN or MCLK (fMCLK) and the master
clock divider ratio R stored in Register Address 0x01 determine
its frequency.
fOSCOUT = fMCLK/R or fOSCIN
In its default setting (0x00 in Register 0x01), the REFCLK pin
provides a buffered output of fOSCIN.
31
TxIQ(1)
32
TxIQ(0)
33
DV
DD
34
DGND
35
PR
OFILE(
1)
36
PR
OFILE(
0)
37
R
ESET
38
DV
DD
39
DGND
40
DGND
41
SC
LK
42
CS
43
SD
IO
44
SD
O
2
DRGND
3
DRVDD
4
(MSB) IF(11)
7
IF(8)
6
IF(9)
5
IF(10)
1
AVDD
8
IF(7)
9
IF(6)
10
IF(5)
12
IF(3)
13
IF(2)
14
IF(1)
15
IF(0)
16
(MSB) RxIQ(3)
17
RxIQ(2)
18
RxIQ(1)
19
RxIQ(0)
20
RxSYNC
21
DRGND
22
DRVDD
23
MCLK
24
DVDD
25
DGND
26
TxSYNC
27
(MSB) TxIQ(5)
28
TxIQ(4)
29
TxIQ(3)
30
TxIQ(2)
11
IF(4)
79
I IN+
78
I IN–
77
AGNDIQ
74
AGNDIQ
75
NC
76
NC
80
AGNDIQ
73
AVDDIQ
72
DRVDD
71
REFCLK
69
DGNDSD
68
SDELTA0
67
SDELTA1
66
DVDDSD
65
CA_EN
64
CA_DATA
63
CA_CLK
62
DVDDOSC
61
OSCIN
60
XTAL
59
DGNDOSC
58
AGNDPLL
57
PLLFILT
56
AVDDPLL
55
DVDDPLL
54
DGNDPLL
53
AVDDTx
52
Tx+
51
Tx–
70
DRGND
45
DGNDTx
46
DV
DDTx
47
P
W
RDN
48
RE
FIO
49
FS
ADJ
50
AGNDTx
NC
AGND
IF12+
IF12
AGND
AV
DD
REFT12
RE
FB1
2
AV
DD
AGND
NC
AGND
AV
DD
REFT8
RE
FB8
AV
DD
AGND
Q
IN+
Q
IN
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
PIN 1
AD9877
TOP VIEW
(Pins Down)
NC = NO CONNECT
02716-016
C3
0.1
μF
C6
0.1
μF
C1
0.1
μF
C4
0.1
μF
CP1
10
μF
CP2
10
μF
C2
0.1
μF
C5
0.1
μF
C10
20pF
C11
20pF
GUARD TRACE
C12
0.01
μF
R1
1.3k
Ω
C13
0.1
μF
RSET
2k
Ω
Figure 16. Basic Connection Diagram
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