• EMC83116309C辐射时钟解决方案

EMC83116309C辐射时钟解决方案

所属分类: 解决方案 | 发布日期:2020-08-27 10:08:10

Features 1.65V – 3.6V, 1x Ultra Low Power Mobile EMI Reduction IC ● FCC approved method of EMI attenuation ● Non-PLL phase controlled Active EMI management architecture ● Generates a 1X low EMI...

产品详情

Features
1.65V – 3.6V, 1x Ultra Low Power Mobile EMI Reduction IC
● FCC approved method of EMI attenuation
● Non-PLL phase controlled Active EMI management architecture
● Generates a 1X low EMI Phase Modulated replication of the input signal.
● Vdd 1.8V 1MHz to 40MHz
● Vdd 2.5V - 3.6V 1MHz to 54 MHz
● Multiple Deviation Selections
● Minimum frequency deviation selection capability
● Power Down Mode
● 8-pin WDFN package
● Supports automotive reliability standard

Product Description
The EMC83116309C is a versatile 1x Active EMI management IC designed to provide system wide reduction of Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) from clock and data sources.The EMC83116309C allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations. The EMC83116309C family of mobile active EMI management.

ICs is unique in it’s design and is based on PulseTake’s phase controlled Active EMI management technology. This allows operation on aperiodic as well periodic signals. By the precise placement of the edges of the reconstructed input signal, the peak energy of the output is distributed over a wider and controlled energy band thereby significantly lowering system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. The EMC83116309C has an input frequency range of 1 MHz to 40/54MHz over a wide voltage range of 1.8V to 3.6V. The device has one “deviation control pins” SS0 to allow flexibility and optimization of both EMI compliance as well as in system design. The device is available in an 8 pin DFN package.

Applications
The EMC83116309C is targeted towards mobile platforms such as cell phones, MIDs, Netbooks and other “power and space” sensitive applications.

Block Diagram

 

EMC83116309C

Pin Description

EMC83116309C Pin Configuration

1. XIN 晶体振荡器输入
2. XOUT 晶体振荡器输出
3. MR上拉时具有扩频调制率下拉扩频调制速率。 内部有一个上拉电阻。
4. VSS 系统接地参考输入。
5. MODOUT 相位扩频调制后的缓冲输出,接数字芯片的XIN时钟输入。
6. SS0 扩频幅度控制引脚(请参见功能表)内部上拉电阻,断开扩频幅度短路扩频幅度
7. NC 空脚,无连接引脚
8. VDD 内部系统电源引脚

 


使用说明


1、将原来机器主板上的晶振,添加到小板子上,包括那两颗小的贴片瓷片电容。

2、在主板上找到2.5v或者3.3v电压,接在小板子上的VDD上,然后主板上找个GND接小板子上的GND上。

3、MODOUT时钟输出接主板的时钟输入XIN端,XOUT端悬空。

4、如果主板上是有源晶振,那么拆下来的有源晶振接小板的XIN端即可,小板的XOUT端悬空。

5、SW1直接用0ohm电阻接GND即可,打开扩频功能,这样能降低EMI干扰。

6、SW1直接用0ohm电阻接GND即可,使扩频幅度最大,这样能降低EMI干扰。


备注


1、EMC83116309C的pin5输出直接接主板MCU的XIN端(主板原来的晶振时钟CLK IN输入端),另外一端XOUT不接悬空即可。

2、试验时小模块与主板搭接,Pin8接电源,Pin4接地,Pin5输出接MCU数字芯片的时钟输入端,这些连接线尽量短,环路尽量小。

3、将在此EMI抑制芯片EMC83116309C在layout在PCB上时, C4、C5、C6三颗电源应该最小回路靠近EMC83116309C Pin4的地脚,电源输入要加磁珠与电容滤波。

 


EMC83116309C资料下载

EMC83116309C REV00

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