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參數(shù)資料
| 型號(hào)： | LMX2377U |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinum⑩超低功耗雙頻率合成射頻個(gè)人通信 |
| 文件頁(yè)數(shù)： | 28/44頁(yè) |
| 文件大?。?/td> | 3181K |
| 代理商： | LMX2377U |
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Test Setups
(Continued)
LMX2377U OSC
in
Sensitivity Test Setup
20022641
The block diagram above illustrates the setup required to
measure the LMX2377U device’s OSC
buffer sensitivity
level. The same setup is used for the LMX2370TMEB/
LMX2370SLEEB Evaluation Boards. This setup is similar to
the f
sensitivity setup except that the signal generator is
now connected to the OSC
pin and both f
pins are tied to
V
. The 51
shunt resistor matches the OSC
input to the
signal generator. The R counter is typically set to 1000, i.e.
Main R_CNTR Word = 1000 or Aux R_CNTR Word = 1000.
The reference divider output is routed to the F
o
LD pin by
selecting the
Main PLL R Divider Output
word (F
LD Word
= 2 or 10) or the
Aux PLL R Divider Output
word (F
LD
Word = 1 or 9) in Code Loader. Similarly, a Universal
Counter is connected to the F
LD pin and is tied to the 10
MHz reference output from the signal generator. The output
of the reference divider is monitored and should be equal to
OSC
in
/ Main R_CNTR or OSC
in
/ Aux R_CNTR.
Again, V
is swept from 2.7V to 5.5V. The MICROWIRE
power supply, Vμc, is tied to V
. The OSC
input frequency
and voltage level are then swept with the signal generator.
The measurements are repeated at different temperatures,
namely T
= -40C, +25C, and +85C. Sensitivity is reached
when the frequency error of the divided input signal is
greater than or equal to 1 Hz.
L
www.national.com
28
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2377U WAF | 制造商:Texas Instruments 功能描述: |
| LMX2377USLBX | 功能描述:IC FREQ SYNTH DUAL 24LAMINATECSP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2377USLEX | 功能描述:IC FREQ SYNTH DUAL 20LAMUCSP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2377UTM | 功能描述:IC FREQ SYNTH DUAL 20TSSOP RoHS:否 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時(shí)鐘 輸出:時(shí)鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無(wú)/無(wú) 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* |
| LMX2377UTMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
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