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参数资料
| 型号： | LMX2335U |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| 中文描述： | PLLatinum超低功耗双频率合成射频个人通信 |
| 文件页数： | 30/48页 |
| 文件大小： | 3127K |
| 代理商： | LMX2335U |
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Test Setups
(Continued)
LMX2335U and LMX2336U OSC
in
Sensitivity Test Setup
10136741
The block diagram above illustrates the setup required to
measure the LMX2336U device’s OSC
buffer sensitivity
level. The same setup is used for the LMX2336TMEB/
LMX2336SLEEB 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.
RF1 R_CNTR Word = 1000 or RF2 R_CNTR Word = 1000.
The reference divider output is routed to the F
o
LD pin by
selecting the
RF1 PLL R Divider Output
word (F
LD Word
= 2 or 10) or the
RF2 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
/ RF1 R_CNTR or OSC
in
/ RF2 R_CNTR.
Again, V
is swept from 2.7V to 5.5V. The OSC
input
frequency and voltage level are then swept with the signal
generator. The measurements are repeated at different tem-
peratures, 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.
The LMX2335U OSC
sensitivity test setup is very much
similar to the above test setup.
L
www.national.com
30
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| LMX2336LSLB | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2336LTM | PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2336TM | PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| LMX2353TMX | PLLatinum⑩ Fractional N Single 2.5 GHz Frequency Synthesizer |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2335U WAF | 制造商:Texas Instruments 功能描述: |
| LMX2335USLBX | 功能描述:IC FREQ SYNTH DUAL 16LAMINATECSP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2335UTM | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2335UTM/NOPB | 功能描述:IC FREQ SYNTHESIZER DUAL 16TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2335UTMX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
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