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參數(shù)資料
型號: SKY72301-22
廠商: Skyworks Solutions Inc
文件頁數(shù): 2/22頁
文件大小: 0K
描述: IC SYNTHESIZER 1GHZ 28-EPTSSOP
產(chǎn)品目錄繪圖: 28-TSSOP
標(biāo)準(zhǔn)包裝: 1
類型: 分?jǐn)?shù) N 合成器
PLL:
輸入: 時鐘,晶體
輸出: 時鐘,晶體
電路數(shù): 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 是/是
頻率 - 最大: 1GHz
除法器/乘法器: 是/無
電源電壓: 2.7 V ~ 3.3 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.173",4.40mm 寬)裸露焊盤
供應(yīng)商設(shè)備封裝: 28-TSSOP 裸露焊盤
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面: 587 (CN2011-ZH PDF)
其它名稱: 863-1078-6
DATA SHEET SKY72301-22 FREQUENCY SYNTHESIZER
A3
A2 A1
A0 11
10
9
8
7
6
5
4
3
2
1
0
00
X
X MSB
LSB
Main Synthesizer Divider Index
C1417
Figure 6. Main Divider Register (Write Only)
C1418
A3
A2 A1
A0 11
10
9
8
7
6
5
4
3
2
1
0
00
01
X
X MSB
LSB
Main Synthesizer Dividend (MSBs)
Figure 7. Main Dividend MSB Register (Write Only)
A3
A2 A1
A0
11
10
9
8
7
6
5
4
3
2
1
0
00
10
X
MSB
LSB
Main Synthesizer Dividend (LSBs)
C1419
Figure 8. Main Dividend LSB Register (Write Only)
General Synthesizer Registers
The dual-programmable reference frequency dividers provide the
reference frequencies to the phase detectors by dividing the
crystal oscillator frequency. The lower five bits hold the reference
frequency divide index for the main phase detector. The next five
bits hold the reference frequency divide index for the auxiliary
phase detector. Divide ratios from 1 to 32 are possible for each
reference frequency divider (see Tables 2 and 3).
The Reference Frequency Dividers Register configures the dual-
programmable reference frequency dividers for the main and
auxiliary synthesizers. As shown in Figure 11, the values to be
loaded are:
Main Reference Frequency Divider Index = Desired main
oscillator frequency division ratio – 1. Default value on power-
up is 0, signifying that the reference frequency is not divided for
the main phase detector.
Auxiliary Reference Frequency Divider Index = Desired auxiliary
oscillator frequency division ratio – 1. Default value on power-
up is 0, signifying that the reference frequency is not divided for
the auxiliary phase detector.
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
10
September 11, 2009 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 200706C
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