- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄385493 > LMX2531LQ1500E (NATIONAL SEMICONDUCTOR CORP) High Performance Frequency Synthesizer System with Integrated VCO PDF資料下載
參數(shù)資料
| 型號(hào)： | LMX2531LQ1500E |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 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(yè)數(shù)： | 17/23頁(yè) |
| 文件大小： | 561K |
| 代理商： | LMX2531LQ1500E |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)當(dāng)前第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)
2.0 General Programming Information
(Continued)
2.4.4 DITHER -- Dithering
Dithering is useful in reducing fractional spurs, especially those that occur a a fraction of the channel spacing. The only exception
is when the fractional numerator is zero. In this case, dithering usually is not a benefit. Dithering also can sometimes increase the
PLL phase noise by a fraction of a dB. In general, if dithering is disabled, phase noise may be slightly better inside the loop
bandwidth of the system, but spurs are likely to be worse too.
DITHER
0
1
2
3
Dithering Mode
Weak Dithering
Reserved
Strong Dithering
Dithering Disabled
2.4.5 FDM -- Fractional Denominator Mode
When this bit is set to 1, the 10 MSB bits for the fractional numerator and denominator are considered. This allows the fractional
denominator to range from 1 to 4,194,303. If this bit is set to zero, only the 12 LSB bits of the fractional numerator and
denominator are considered, and this allows a fractional denominator from 1 to 4095. When this bit is disabled, the current
consumption is about 0.5 mA lower.
2.4.6 -- DIV2
When this bit is enabled on the appropriate option, the output of the VCO is divided by 2 on options that offer this feature. This
has a small impact on harmonic content and output power.
DIV2
0
1
VCO Output Frequency
Not Divided by 2
Divided by 2
L
www.national.com
17
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMX2531LQ1742 | Evaluation Board Operating Instructions |
| LMX2531LQ1742FPEB | Evaluation Board Operating Instructions |
| LMX3305SLBX | Triple Phase Locked Loop for RF Personal Communications |
| LMX3305 | Triple Phase Locked Loop for RF Personal Communications |
| LMX4168FLQ | Radio Transceiver for DECT |
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(lèi)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(chēng):National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| LMX2531LQ1500EX | 制造商:NSC 制造商全稱(chēng):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(lèi)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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。