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ASM3P2879A

器件名称: ASM3P2879A

功能描述: Low Power Peak Reducing EMI Solution

文件大小: 179.82KB 共12页

生产厂商: PULSECORE

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简　　介:January 2007 rev 1.5 Low Power Peak Reducing EMI Solution Features Generates an EMI optimized clock signal at the output. Integrated loop filter components. Operates with a 3.3V /2.5V Supply. Operating current less than 4mA. Low power CMOS design. Input frequency range: 13MHz to 30MHz for 2.5V : 13MHz to 30MHz for 3.3V Generates a 1X low EMI spread spectrum clock of the input frequency. Frequency deviation: ±1% @ 24MHz Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin TSSOP packages. ASM3P2879A The ASM3P2879A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2879A modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, and more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal’s bandwidth is called ‘spread spectrum clock generation’. Applications The ASM3P2879A is targeted towards all portable devices with very low power requirements like MP3 players, Notebooks and digital still cameras. Product Description The ASM3P2879A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2879A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction ……

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