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P2027AG-08SR 参数 Datasheet PDF下载

P2027AG-08SR图片预览
型号: P2027AG-08SR
PDF下载: 下载PDF文件 查看货源
内容描述: 通用EMI降低IC [General Purpose EMI Reduction IC]
分类和应用:
文件页数/大小: 8 页 / 172 K
品牌: PULSECORE [ PulseCore Semiconductor ]
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November 2006  
rev 0.2  
P2027A  
Table-1 Modulation and Spreading Selection  
MRA  
SR0  
Spread Range  
Reserve  
Modulation Rate  
Reserve  
(Fin/10)*34.72 KHz  
(Fin/10)*20.83 KHz  
(Fin/10)*20.83 KHz  
0
0
1
1
0
1
0
1
+/- 0.30%  
+/- 0.20%  
+/- 0.60%  
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 CLKIN, Pin 1).  
Example: P2027 is designed for DSC and digital video and imaging markets and is optimized for 27 MHz under  
minimum deviation settings. Selecting P2027’s spread options to MRA=1 and SR0=1 for a 27 MHz input signal  
provides a percentage deviation of +/-0.60% (see Table 1) from the reference signal. This results in frequency  
on ModOUT being swept from 27.16 MHz to 26.84 MHz at a modulation rate of 56.24 KHz (see Table 1). This  
particular example (see the below figure) given here is a new EMI reduction method for DSC applications and is  
already gaining popularity among leading manufacturers.  
Application Schematic for Digital Still Camera  
General Purpose EMI Reduction IC  
3 of 8  
Notice: The information in this document is subject to change without notice.