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參數(shù)資料
| 型號： | SKY72301-22 |
| 廠商： | Skyworks Solutions Inc |
| 文件頁數(shù)： | 5/22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： | 是 |
| 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
1
X
MSB
LSB
Full Power Down
Main Synthesizer Power Down
Main Synthesizer Mode
Main Synthesizer
ΔΣ Fractionality
Auxiliary Synthesizer Power Down
Auxiliary Synthesizer Mode
Multiplexer Output Selection
Mux_out Pin Tri-State Enable
C1424
Figure 13. Power Down/Multiplexer Output Select Control Register (Write Only)
Table 4. Multiplexer Output
Multiplexer Output Select
(Bit 8)
Multiplexer Output Select
(Bit 7)
Multiplexer Output Select
(Bit 6)
Multiplexer Output
(Mux_out)
0
Reference Oscillator
0
1
Auxiliary Reference Frequency (Fref_aux)
0
1
0
Main Reference Frequency (Fref_main)
0
1
Auxiliary Phase Detector Frequency (Fpd_aux)
1
0
Main Phase Detector Frequency (Fpd_main)
1
0
1
Serial data out
1
0
Serial interface test output
1
Unused
Main Synthesizer
Fractionality = One-bit flag to configure
the size of the main
modulator. This has a direct effect on
power consumption and on the level of fractionality and step
size. When this bit is cleared, the main
modulator is 18-bit
with a fractionality of 218 and a step size of Fref_main/262144.
When this bit is set, the main
modulator is 10-bit with a
fractionality of 210 and a step size of Fref_main/1024.
Auxiliary Synthesizer Power Down = One-bit value to power
down the auxiliary synthesizer. When this bit is cleared, the
auxiliary synthesizer is powered up. When this bit is set, the
auxiliary synthesizer is in power-down mode.
Auxiliary Synthesizer mode = One-bit value to power down the
auxiliary synthesizer’s
modulator and fractional unit to
operate as an integer-N synthesizer. When this bit is cleared,
the auxiliary synthesizer is in fractional-N mode. When this bit is
set, the auxiliary synthesizer is in integer-N mode.
NOTE: There are no special power-up sequences required for the
SKY72301-22.
Multiplexer Output Selection = Three-bit value that selects
which internal signal is output to the Mux_out pin. Internal
signals available on this pin are the following:
Reference Oscillator, Fref
Main or auxiliary divided reference (post reference
frequency main or auxiliary dividers), Fref_main or Fref_aux
Main or auxiliary phase detector frequency (post main and
auxiliary frequency dividers), Fpd_main or Fpd_aux
Serial data out, for loop-back and test purposes
See Table 4 for more information.
Mux_out Pin Tri-State Enable = One-bit flag to tri-state the
Mux_out pin. When this bit is cleared, the Mux_out pin is
enabled. When this bit is set, the Mux_out pin is tri-stated.
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
200706C Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 11, 2009
13
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