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參數資料
| 型號： | P2005X-08TR |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | Low Frequency EMI Reduction IC |
| 中文描述： | 低頻電磁干擾降低集成電路 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 459K |
| 代理商： | P2005X-08TR |
October 2003
rev 1.0
P2005A/S
Alliance Semiconductor
2575, Augustine Drive
Santa Clara, CA
Tel: 408.855.4900
Fax: 408.855.4999
www.alsc.com
Notice: The information in this document is subject to change without notice.
Low Frequency EMI Reduction IC
Features
FCC approved method of EMI attenuation.
Provides up to 15dB of EMI suppression.
Generates a 1X or X low EMI spread spectrum
clock of the input frequency.
Input frequency range: 8MHz to 32MHz.
Internal loop filter minimizes external components
and board space.
Frequency deviation:
o
P2005A: ± 1% to ± 3%
o
P2005S: ± 0.6% to ± 1.8%
SSON# control pin for spread spectrum enable
and disable options.
Low cycle-to-cycle jitter.
3.3V or 5V operating voltage range.
16mA output drives.
TTL or CMOS compatible outputs.
Ultra-low power CMOS design.
Available in 8-pin SOIC and TSSOP.
Product Description
The P2005X is a versatile spread spectrum frequency
modulator
designed
specifically
frequencies from 8MHz to 32MHz.
Refer Output
Frequency Selection Table.
The P2005X can generate an
EMI reduced clock from crystal, ceramic resonator, or
system clock. The P2005X offers various percentage
for
input
clock
deviations ranging form ±0.6% to ±3.0%.
Refer
Frequency Deviation Selections Table.
The P2005X
reduces electromagnetic interference (EMI) at the clock
source, allowing system wide reduction of EMI of down
stream clock and data dependent signals. The P2005X
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 P2005X uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented in a proprietary all digital method.
The P2005X 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 P2005X is targeted towards EMI management for
high-speed digital applications such as PC peripheral
devices, consumer electronics and embedded controller
systems.
VDD
Block Diagram
VSS
XIN
Divider
Divider
Frequency
Feedback
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
MODOUT
PLL
SSON#
DIV2
SR0
Crystal
Oscillator
XOUT
相關PDF資料 |
PDF描述 |
|---|---|
| P2005X-08TT | Low Frequency EMI Reduction IC |
| P2005A | Low Frequency EMI Reduction IC |
| P2008A-08TR | General Purpose EMI Reduction IC |
| P2008A-08TT | General Purpose EMI Reduction IC |
| P2008AF-08SR | General Purpose EMI Reduction IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| P2005X-08TT | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Low Frequency EMI Reduction IC |
| P200-6 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| P-200838 | 制造商:Amphenol Aerospace 功能描述:PLUG |
| P2008A | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
| P2008A-08SR | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:General Purpose EMI Reduction IC |
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