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參數(shù)資料
| 型號： | SP5669KG |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 2.7GHz I2C Bus Controlled Synthesiser |
| 中文描述： | 2.7GHz的I2C總線控制合成器 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 237K |
| 代理商： | SP5669KG |
11
SP5669
Loop Bandwidth
The majority of applications for which the SP5669 is
intended require a loop filter bandwidth of between
2kHz and10kHz.
Typically the VCO phase noise will be specified at both
1kHz and10kHz offset. It is common practice to arrange
the loop filter bandwidth such that the 1kHz figure lies
within the loop bandwidth. Thus the phase noise de-
pends on the synthesiser comparator noise floor, rather
than the VCO.
The 10kHz offset figure should depend on the VCO
providing the loop is designed correctly, and is not
underdamped.
Reference Source
The SP5669 offers optimal LO phase noise perform-
ance when operated with a large step size. This is due
to the fact that the LO phase noise within the loop
bandwidth is:
(
phase comparator
noise floor + 20 log
10
phase comparator frequency
LO frequency
Assuming the phase comparator noise floor is flat
irrespective of sampling frequency, this means that the
best performance will be achieved when the overall LO
to phase comparator division ratio is a minimum.
There are two ways of achieving a higher phase compa-
rator sampling frequency:–
A) Reduce the division ratio between the reference
source and the phase comparator
B) use a higher reference source frequency.
Approach B) may be preferred for best performance
since it is possible that the noise floor of the reference
oscillator may degrade the phase comparator perform-
ance if the reference division ratio is very small.
Driving Two Devicesfrom A Common
Reference
As mentioned earlier in the Datasheet, the SP5669 has
a REF/COMP output which allows two synthesisers to
be driven from a common reference. To do this, the
‘‘Master” should be programmed by setting RE = 1 and
RTS = 0. The driven device should be programmed for
normal operation i.e. RE = 0, and RTS = 0. The two
devices should be connected as shown below.
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| SP5669KGMP1S | 2.7GHz I2C Bus Controlled Synthesiser |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP5669KGMP1S | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2.7GHz I2C Bus Controlled Synthesiser |
| SP5669KGMP1T | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:2.7GHz I2C Bus Controlled Synthesiser |
| SP567 | 制造商:Power-One 功能描述: |
| SP-5717 | 功能描述:SPEAKER 92DB SENSITIVITY 57MM DI 制造商:soberton inc. 系列:SP 微型揚聲器 包裝:托盤 零件狀態(tài):在售 技術(shù):磁性 類型:通用 頻率范圍:400Hz ~ 4kHz 頻率 - 自諧振:400Hz 阻抗:8 Ohms 效率 - dBA:92 效率 -?測試:100mW/100mm 效率 -?類型:聲壓級?(SPL) 功率 - 額定值:250mW 功率 - 最大值:500mW 端口位置:頂部 形狀:圓形 材料 - 錐體:紙 材料 - 磁鐵:鐵氧體 侵入防護:- 等級:- 端接:焊接孔眼 大小/尺寸:2.244" 直徑（57.00mm） 高度 - 安裝（最大值）:0.669"（17.00mm） 標準包裝:25 |
| SP572 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:語音壓擴電路 |
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