P2040A

October 2005 rev 1.2 LCD Panel EMI Reduction IC Features ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ www.DataSheet4U.com P2040A applications. The P2040A reduces electromagnetic interference (EMI) at the clock source, allowing system FCC approved method of EMI attenuation. Provides up to 20dB of EMI suppression. Generates a low EMI spread spectrum clock of the input frequency. Input frequency range: 30MHz to 100MHz. Optimized for VGA, SVGA, and higher resolution XGA LCD Panels. Internal loop filter minimizes external components and board space. Six selectable high spread ranges up to ± 2%. Two selectable modulation rates. SSON# control pin for spread spectrum enable and disable options. Low cycle-to-cycle jitter. Wide operating range. Low power CMOS design. Supports most mobile graphic accelerator specifications. ƒ Products available for automotive temperature range. (Refer Spread Spectrum Range Selection Tables) The P2040A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The P2040A 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’. wide reduction of EMI of do...