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P2010AF-08TR 参数 Datasheet PDF下载

P2010AF-08TR图片预览
型号: P2010AF-08TR
PDF下载: 下载PDF文件 查看货源
内容描述: 低频EMI降低IC [Low Frequency EMI Reduction IC]
分类和应用: 晶体外围集成电路光电二极管时钟
文件页数/大小: 8 页 / 161 K
品牌: PULSECORE [ PulseCore Semiconductor ]
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November 2006  
P2010A  
rev 0.2  
Spread Spectrum Selection  
Table 1 illustrates the possible spread spectrum options. The optimal setting should minimize system EMI to the fullest  
without affecting system performance. The spreading is described as a percentage deviation of the center frequency  
(Note: the center frequency is the frequency of the external reference input on XIN/CLK, Pin 1).  
Example of a typical printer or scanner application that operates on a clock frequency of 16MHz:  
A spreading selection of FS0=1 and SR0=1 provides a percentage deviation of +/-2.50%* (see Table 1) of Center  
Frequency. This results in the frequency on ModOUT being swept from 16.40MHz to 15.60MHz at a modulation rate of  
33.33KHz (see Table 1). This particular example (see Figure below) given here is a common EMI reduction method for  
scanner, printer or embedded applications and has already been adopted by most of the leading manufacturers.  
Note: Spreading range selection varies from different system manufacturers and their designs.  
P2010A Application Schematic for Flat-Bed Scanner  
VDD  
16MHz Crystal Input  
XIN/CLK  
XOUT  
VDD  
SR0  
1
2
3
4
8
7
6
5
0.1µF  
FS0  
VSS  
ModOUT  
Connected to CLK input pin of the system  
SSON  
P2010A  
Low Frequency EMI Reduction IC  
3 of 8  
Notice: The information in this document is subject to change without notice.