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P2811A

ON Semiconductor
Part Number P2811A
Manufacturer ON Semiconductor
Description Low Power EMI Reduction IC
Published Feb 5, 2016
Detailed Description P2811A/B and P2812A/B and P2814A/B Low Power EMI Reduction IC Features • FCC approved method of EMI attenuation • Provi...
Datasheet PDF File P2811A PDF File

P2811A
P2811A

Overview
P2811A/B and P2812A/B and P2814A/B Low Power EMI Reduction IC Features • FCC approved method of EMI attenuation • Provides up to 15dB EMI reduction • Generates a 1x, 2x and 4x low EMI spread spectrum clock of the input frequency o 1x: P2811A/B o 2x: P2812A/B o 4x: P2814A/B • Optimized for input frequency range from 10MHz to 40MHz • Internal loop filter minimizes external components and board space • Selectable spread options: o Down Spread and Center Spread • 8 frequency deviation selections: o ±0.
625% to -3.
5% • Low inherent Cycle-to-Cycle Jitter • 3.
3V Operating Voltage • CMOS/TTL compatible inputs and outputs.
• Pin-out compatible with Cypress CY25811, CY25812 and CY25814 • Available in 8-pin SOIC Package Product Description The P28XX devices are versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 10MHz to 40MHz.
Refer to Input/output Frequency Range Selection Table.
The P28XX can generate an EMI reduced clock from crystal, ceramic resonator, or system clock.
The P28XX-A and the P28XX-B offer various combinations of spread options and percentage deviations.
Refer to Frequency Deviation and Spread Selection Table.
These combinations include Down and Center Spread, and percentage deviation range from ±0.
625% to -3.
5%.
The P28XX reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of downstream clock and data dependent signals.
The P28XX allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding, and other passive components that are traditionally required to pass EMI regulations.
The P28XX 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.
Low...


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