Versatile EMI Reduction IC
P2041A
Versatile EMI Reduction IC
Description The P2041A is a selectable spread spectrum frequency modulator
designed s...
Description
P2041A
Versatile EMI Reduction IC
Description The P2041A is a selectable spread spectrum frequency modulator
designed specifically for PC peripheral and embedded controller markets. The P2041A reduces electromagnetic interference (EMI) at the clock source which provides system wide reduction of EMI of all clock dependent signals. The P2041A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations.
The P2041A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all−digital method.
The P2041A 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 P2041A is targeted towards the embedded controller market
and PC peripheral markets including scanners, MFP’s, printers, PDA, IA, and GPS devices.
Features
FCC Approved Method of EMI Attenuation
Provides up to 20 dB of EMI Suppression
Generates a Low EMI Spread Spectrum Clock of the Input
Frequency
Optimized for 25 MHz to 60 MHz Input Frequency Range
Internal Loop Filter Minimizes External Components and Boar...
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