參數(shù)資料
型號(hào)： LMX2434TMX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： PLLatinum Dual High Frequency Synthesizer for RF Personal Communications
中文描述： PLL FREQUENCY SYNTHESIZER, 5000 MHz, PDSO20
封裝： PLASTIC, TSSOP-20
文件頁(yè)數(shù)： 31/49頁(yè)
文件大?。?/td> 943K
代理商： LMX2434TMX
LMX243x OSCin Sensitivity Test Setup
20053590
The block diagram above illustrates the setup required to
measure the LMX243x device’s OSCin buffer sensitivity
level. The same setup is used for the LMX2430TM Evalua-
tion Board. This setup is similar to the FinRF sensitivity setup
except that the signal generator is now connected to the
OSCin pin and both Fin pins are tied to Vcc. The 51
shunt
resistor matches the OSCin input to the signal generator.
The R counter is typically set to 1000, i.e. RF_R word = 1000
or IF_R word = 1000. The reference divider output is routed
to the Ftest/LD pin by selecting the RF_R/ 2 Frequency word
(MUX[3:0] word = 14) or the IF_R/ 2 Frequency word
(MUX[3:0] word = 12) in CodeLoader.AUniversal Counter is
connected to the Ftest/LD pin and is used to monitor the
output frequency of the reference divider. The expected
frequency should be the signal generator frequency divided
by twice the corresponding counter value, i.e. 2000. The
factor of two comes in because the LMX243x device has an
internal /2 circuit which is used to provide a 50% duty cycle.
In a similar way, sensitivity is typically measured over fre-
quency, supply voltage and temperature. In order to perform
the measurement, the temperature, frequency, and supply
voltage is set to a fixed value and the power level (voltage
level) of the signal at OSCin is varied. Sensitivity is reached
when the frequency error of the divided input signal is
greater than or equal to 1 Hz.
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX2434TMX/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
LMX2470 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL
LMX2470EVAL 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 LMX2470 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V
LMX2470SLEX 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
LMX2470SLEX/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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