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參數(shù)資料

型號(hào)：	LMX2430
廠商：	National Semiconductor Corporation
英文描述：	PLLatinum Dual High Frequency Synthesizer for RF Personal Communications
中文描述：	PLLatinum雙高頻率合成射頻個(gè)人通信
文件頁(yè)數(shù)：	36/49頁(yè)
文件大小：	943K
代理商：	LMX2430

1.0 Functional Description

(Continued)

1.8.3 Digital Filtered Lock Detect Output

A digital filtered lock detect status generated from the phase

detector is also available on the Ftest/LD output pin if se-

lected. The lock detect digital filter compares the difference

bewteen the phases of the inputs to the PFD to an RC

generated delay of approximately 15 ns. If the phase error is

less than the 15 ns RC delay for 5 consecutive reference

cycles, the PLL enters a locked state (HIGH). Once in lock,

the RC delay is changed to approximately 30 ns. Once the

phase error becomes greater than the 30 ns RC delay, the

PLL falls out of lock (LOW). When the PLL is in powerdown

mode, the Ftest/LD output is forced LOW. A flow chart of the

digital filtered lock detect output is shown below.

20053503

Similarly, three separate digital filtered lock detect signals

are routed to the multiplexer. Two of these monitor the lock

status of the individual synthesizers. The third detects the

condition when both the RF and IF synthesizers are in a

locked state. External circuitry is not required when the

digital filtered lock detect option is selected. Refer to

Section

2.10

for details on how to program the different digital filtered

lock detect options.

www.national.com

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
LMX2430EVAL	功能描述:EVALUATION BOARD FOR LMX2430 RoHS:否類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
LMX2430EVAL/NOPB	功能描述:時(shí)鐘和定時(shí)器開(kāi)發(fā)工具 LMX2430 EVAL BOARD RoHS:否制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類(lèi)型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX2430SLEX	制造商:Texas Instruments 功能描述:3GHZ HI FREQ DUAL PLL SMD 2430
LMX2430SLEX/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
LMX2430SLEXNOPB	制造商:National Semiconductor 功能描述:PLL Frequency Synthesizer Dual 100MHz to 3000MHz 20-Pin LAM UCSP T/R

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