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參數(shù)資料
| 型號： | LMX2531LQ1500E |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | XO, clock |
| 英文描述： | High Performance Frequency Synthesizer System with Integrated VCO |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 80 MHz, QCC36 |
| 封裝： | 6 X 6 MM, 0.80 MM HEIGHT, LEAD FREE, LLP-36 |
| 文件頁數(shù)： | 21/23頁 |
| 文件大?。?/td> | 561K |
| 代理商： | LMX2531LQ1500E |
2.0 General Programming Information
(Continued)
2.7.7 VCO_ACI_SEL
This bit is used to optimize the VCO phase noise. The recommended values are what are used for all testing purposes, and this
bit should be set as the table below instructs.
Part
VCO_ACI_SEL
8
LMX2531LQ1500E
2.7.8 XTLSEL[2:0] -- Crystal Select
XTLSEL
0
1
2
3
4
5
6
7
Crystal Frequency
<
25 MHz
25 - 50 MHz
50 - 70 MHz
>
70 MHz
Manual Mode
Reserved
Reserved
Reserved
The value of this word needs to be changed based on the frequency presented to the OSCin pin in accordance to the table above.
2.8 REGISTER R7
2.8.1 XTLDIV[1:0] -- Division Ratio for the Crystal Frequency
The frequency provided to the VCO frequency calibration circuitry is based on the OSCin frequency divided down by a factor,
determined by the XTLDIV word. Note that this division ratio is independent of the R counter value or the comparison frequency.
The necessary division ratio depends on the OSCin frequency and is shown in the table below:
XTLDIV
0
1
2
3
Crystal Division Ratio
Reserved
Divide by 2
Divide by 4
Divide by 8
Crystal Range
Reserved
<
20 MHz
20-40 MHz
>
40 MHz
2.8.2 XTLMAN[11:0] -- Manual Crystal Mode
Program all these bits to zero.
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2531LQ1500E/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
| LMX2531LQ1500E_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| LMX2531LQ1500EX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| LMX2531LQ1515E | 制造商:Texas Instruments 功能描述:PLL Frequency Synthesizer Single 1450MHz to 1580MHz 36-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:CLOCK SYNTHESIZER 1.6GHZ 36LLP |
| LMX2531LQ1515E/NOPB | 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray |
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