- 您现在的位置：买卖IC网 > PDF目录2082 > LMK04010BISQ/NOPB (National Semiconductor)IC CLOCK CONDITIONER W/PLL 48LLP PDF资料下载
参数资料
| 型号： | LMK04010BISQ/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 43/65页 |
| 文件大小： | 0K |
| 描述： | IC CLOCK CONDITIONER W/PLL 48LLP |
| 标准包装： | 1,000 |
| 系列： | PowerWise® |
| 类型： | 时钟调节器 |
| PLL： | 是 |
| 输入： | LVCMOS |
| 输出： | 2VPECL，LVPECL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:5 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 1.296GHz |
| 除法器/乘法器： | 是/是 |
| 电源电压： | 3.15 V ~ 3.45 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-LLP（7x7） |
| 包装： | 带卷 (TR) |
| 其它名称： | LMK04010BISQ |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页当前第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页
2
CL = 6 + 6 +
4
= 14 pF
2
CSTRAY
CL = CTUNE + CIN +
C
Po
u
t1
LMK040xx
OSCin
OSCin*
Copt
PLL1 Loop Filter
XTAL
CC1 = 2.2 nF
CC2 = 2.2 nF
R1 = 4.7k
R3 = 10k
Copt
1 nF
R2 = 4.7k
SMV1249-074LF
SNOSAZ8J – SEPTEMBER 2008 – REVISED SEPTEMBER 2011
Figure 16. Reference Design Circuit for Crystal Oscillator Option
Optional Crystal Oscillator Implementation (OSCin/OSCin*)
The LMK04000 family features supporting circuitry for a discretely implemented oscillator driving the OSCin port
pins. Figure 16 illustrates a reference design circuit for a crystal oscillator:
This circuit topology represents a parallel resonant mode oscillator design. When selecting a crystal for parallel
resonance, the total load capacitance, CL, must be specified. The load capacitance is the sum of the tuning
capacitance (CTUNE), the capacitance seen looking into the OSCin port (CIN), and stray capacitance due to PCB
parasitics (CSTRAY), and is given by:
CTUNE is provided by the varactor diode shown in Figure 16, Skyworks model SMV1249-074. A dual diode
package with common cathode and provides the variable capacitance for tuning. The single diode capacitance
ranges from approximately 31 pF at 0.3 V to 3.4 pF at 3 V. The capacitance range of the dual package (anode to
anode) is approximately 15.5 pF at 3 V to 1.7 pF at 0.3 V. The desired value of VTUNE applied to the diode should
be VCC/2, or 1.65 V for VCC = 3.3 V. The typical performance curve from the data sheet for the SMV1249-074
indicates that the capacitance at this voltage is approximately 6 pF (12 pF/2).
The nominal input capacitance (CIN) of the LMK04000 family OSCin pins is 6 pF. The stray capacitance (CSTRAY)
of the PCB should be minimized by arranging the oscillator circuit layout to achieve trace lengths as short as
possible and as narrow as possible trace width (50
Ω characteristic impedance is not required). As an example,
assume that CSTRAY is 4 pF. The total load capacitance is nominally:
Consequently the load capacitance specification for the crystal in this case should be nominally 14 pF.
48
Copyright 2008–2011, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| LMV393MUTAG | IC OP AMP DUAL GP LV LV 8-UDFN |
| LMX339HASD+T | IC COMPARATOR GP QUAD 14-SOIC |
| LT1011AIS8#TRPBF | IC VOLTAGE COMPARATOR 5V 8-SOIC |
| LT1016IS8#TRPBF | IC COMPARATOR 10NS HI-SPD 8-SOIC |
| LT1017IS8#TRPBF | IC COMPARATOR MICRPWR DUAL 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LMK04010BISQX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Low-Noise Clock Jitter Cleaner with Cascaded PLLs |
| LMK04010BISQX/NOPB | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| LMK04011BISQ | 制造商:Texas Instruments 功能描述:Clock Conditioner 48-Pin LLP EP T/R |
| LMK04011BISQ/NOPB | 功能描述:时钟合成器/抖动清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| LMK04011BISQE | 制造商:Texas Instruments 功能描述:Clock Conditioner 48-Pin LLP EP T/R 制造商:Texas Instruments 功能描述:PRECISION CLOCK CONDITIONER, 48LLP |
发布紧急采购，3分钟左右您将得到回复。