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5P49EE602NLGI8 PDF预览

5P49EE602NLGI8

更新时间: 2024-01-16 01:18:29
品牌 Logo 应用领域
艾迪悌 - IDT 时钟发生器
页数 文件大小 规格书
25页 438K
描述
VERSACLOCK? LOW POWER CLOCK GENERATOR

5P49EE602NLGI8 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Not Recommended零件包装代码:VFQFPN
包装说明:HVQCCN, LCC24,.16SQ,20针数:24
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.29
JESD-30 代码:S-XQCC-N24JESD-609代码:e3
长度:4 mm湿度敏感等级:3
端子数量:24最高工作温度:85 °C
最低工作温度:-40 °C最大输出时钟频率:120 MHz
封装主体材料:UNSPECIFIED封装代码:HVQCCN
封装等效代码:LCC24,.16SQ,20封装形状:SQUARE
封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):260
电源:1.8 V主时钟/晶体标称频率:40 MHz
认证状态:Not Qualified座面最大高度:1 mm
子类别:Clock Generators最大供电电压:1.89 V
最小供电电压:1.71 V标称供电电压:1.8 V
表面贴装:YES技术:CMOS
温度等级:INDUSTRIAL端子面层:Matte Tin (Sn) - annealed
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:4 mmuPs/uCs/外围集成电路类型:CLOCK GENERATOR, VIDEO
Base Number Matches:1

5P49EE602NLGI8 数据手册

 浏览型号5P49EE602NLGI8的Datasheet PDF文件第5页浏览型号5P49EE602NLGI8的Datasheet PDF文件第6页浏览型号5P49EE602NLGI8的Datasheet PDF文件第7页浏览型号5P49EE602NLGI8的Datasheet PDF文件第9页浏览型号5P49EE602NLGI8的Datasheet PDF文件第10页浏览型号5P49EE602NLGI8的Datasheet PDF文件第11页 
IDT5P49EE602  
VERSACLOCK® LOW POWER CLOCK GENERATOR  
EEPROM CLOCK GENERATOR  
Example  
Fc = 150KHz is the desired loop bandwidth. The total A*M  
value is 160. The (damping factor) target should be 0.7,  
meaning the loop is critically damped. Given Fc and A*M, an  
optimal loop filter setting needs to be solved for that will  
meet both the PLL loop bandwidth and maintain loop  
stability.  
Choose a mid-range charge pump from register table  
Icp= 11.9uA.  
K* KVCO = 300MHz/V * 40uA = 12000A/Vs  
5
-1  
c = 2* Fc = 9.42x10 s  
PLL Loop Bandwidth:  
Charge pump gain (K) = Ip / 2  
p = (Cz + Cp)/(Rz * Cz * Cp) = z (1 + Cz / Cp)  
VCO gain (KVCO) = 950MHz/V * 2  
Solving for Rz, the best possible value Rz=30kOhms  
(RZ[1:0]=10) gives  
M = Total multiplier value (See the PRE-SCALERS,  
FEEDBACK-DIVIDERS, POST-DIVIDERS section for more  
detail)  
= 1.2  
Solving back for the PLL loop bandwidth, Fc=149kHz.  
The phase margin must be checked for loop stability.  
c = (Rz * K* KVCO * Cz)/(M * (Cz + Cp))  
Fc = c / 2  
5
-1  
5 -1  
m = (360 / 2) * [tan-1 (9.42x10 s / 1.19x10 s )  
-1  
5
-1  
6 -1  
Note, the phase/frequency detector frequency (FPFD) is  
typically seven times the PLL closed-loop bandwidth (Fc)  
but too high of a ratio will reduce your phase margin thus  
compromising loop stability.  
- tan (9.42x10 s / 1.23x10 s )] = 45°  
The phase margin would be acceptable with a fairly stable  
loop.  
To determine if the loop is stable, the phase margin (m)  
would need to be calculated as follows.  
Phase Margin:  
z = 1 / (Rz * Cz)  
p = (Cz + Cp)/(Rz * Cz * Cp)  
-1  
-1  
m = (360 / 2) * [tan (c/ z) - tan (c/ p)]  
To ensure stability in the loop, the phase margin is  
recommended to be > 60° but too high will result in the lock  
time being excessively long. Certain loop filter parameters  
would need to be compromised to not only meet a required  
loop bandwidth but to also maintain loop stability.  
®
IDT™ VERSACLOCK LOW POWER CLOCK GENERATOR  
8
IDT5P49EE602 REV C 061110  

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