器件名称: ASM3P2872AF-08ST
功能描述: Low Power Peak EMI Reducing Solution
文件大小: 179.42KB 共12页
简 介:November 2006 rev 1.7 Low Power Peak EMI Reducing 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 6mA 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: -1.25% @ 22MHz Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin TSSOP packages.
ASM3P2872A
The ASM3P2872A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method. The ASM3P2872A 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 ASM3P2872A is targeted towards all portable devices with very low power requirements like MP3 players, Notebooks and digital still cameras.
Product Description
The ASM3P2872A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2872A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction o……
