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AD9993BBCZ データシート(PDF) 39 Page - Analog Devices

部品番号 AD9993BBCZ
部品情報  Integrated Mixed-Signal Front End
PDF  57 Pages
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD9993BBCZ データシート(HTML) 39 Page - Analog Devices

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AD9993
Data Sheet
Rev. A | Page 38 of 56
LOOP FILTER CONTROL SIGNALS REGISTER
Address: 0x02F, Reset: 0xF7, Name: LF_CTRL2
Table 28. Bit Descriptions for LF_CTRL2
Bits
Bit Name
Description
Reset
Access
[7:6]
LF_R3
Loop filter coefficient.
0x3
RW
00 = 4.63 kΩ.
01 = 2.315 kΩ.
10 = 1.543 kΩ.
11 = 1.157 kΩ
[5:4]
LF_R1
Loop filter coefficient.
0x3
RW
00 = 12.04 kΩ.
01 = 6.02 kΩ.
10 = 4.01 kΩ.
11 = 3.01 kΩ.
[2:0]
LF_C3
Loop filter coefficient.
0x7
RW
000 = 0.6325 pF.
001 = 1.265 pF.
010 = 1.8975 pF.
011 = 2.530 pF.
100 = 3.1625 pF.
101 = 3.795 pF.
110 = 4.4275 pF.
111 = 5.06 pF.
LOOP FILTER CONTROL SIGNALS REGISTER
Address: 0x030, Reset: 0x00, Name: LF_CTRL3
Table 29. Bit Descriptions for LF_CTRL3
Bits
Bit Name
Description
Reset
Access
1
EXT_CP_SEL
Short external CP pin to charge pump output.
0x0
RW
0
BYP_R3
Bypass R3 in loop filter.
0x0
RW



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