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ASM3P2853A - Peak EMI Reducing Solution

General Description

The ASM3P2853A is a versatile spread spectrum frequency modulator.

The ASM3P2853A reduces electromagnetic interference (EMI) at the clock source.

Key Features

  • Generates an EMI optimized clock signal at output. Input frequency: 25 MHz. Frequency outputs: o o USB Clock (48 MHz unmodulated) 50 MHz (modulated), ±1% centre spread shielding that are required to pass EMI regulations. The ASM3P2853A modulates the output of PLL in order to spread the bandwidth of a synthesized clock, thereby decreasing the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and mos.

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Datasheet Details

Part number ASM3P2853A
Manufacturer Alliance Semiconductor Corporation
File Size 2.67 MB
Description Peak EMI Reducing Solution
Datasheet download datasheet ASM3P2853A Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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December 2004 www.DataSheet4U.com ASM3P2853A Peak EMI Reducing Solution rev 0.7 Features Generates an EMI optimized clock signal at output. Input frequency: 25 MHz. Frequency outputs: o o USB Clock (48 MHz unmodulated) 50 MHz (modulated), ±1% centre spread shielding that are required to pass EMI regulations. The ASM3P2853A modulates the output of PLL in order to spread the bandwidth of a synthesized clock, thereby decreasing 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 clock generators. Lowering EMI by increasing a signal’s bandwidth is called spread spectrum clock generation. Modulation rate: 39 KHz. Spread Spectrum ON/OFF control Supply voltage range 2.5V ± 5%.