ClockCS2000 Family Generation and Multiplication/Jitter Reduction Solution0 pages

CIRRUS LOGC CS2000-CP Fractional-N Clock Synthesizer & Clock Multiplier Features General Description The CS2000-CP is an extremely versatile Systemclocking device that utilizes a programmable phase lock loop. The CS2000-CP is based on a hybrid ana-log-digital PLL architecture comprised of a unique combination of a Delta-Sigma Fractional-N Frequency Synthesizer and a Digital PLL. This architecture allows for both frequency synthesis/clock gnration from a stable r驩frence clock as well as gn驩ration of a low-jitter clock relative to an external noisy synchronization clock. The design is also unique in that it can gnrale low-jitter docks relative to noisy external synchroniza驭tion docks at frequencies as low as 50 Hz. The CS2000-CP supports both PC and SPI forfull software controL The CS2000-CP is available in a 10-pin MSOP package in Commercial (~10°C to +7(TC) and Automotive (-40°C to +85*C) grades, Customer development kits are also available for device ͩvaluation. Please see "Ordering Information" on page 36 for complte dtails. ♦ Delta-Sigma Fractional-N Frequency Synthesis - G詩nrtes a Low Jitter 6 - 75 MHz Clock from an 8 - 75 MHz R颩frence Clock ♦ Clock Multiplier / Jitter Rduction - G驩nrtes a Low Jitter 6 - 75 MHz Clock from a Jittery or Intermittent 50 Hz to 30 MHz Clock Source ♦ H颮ghly Accurate PLL Multiplication Factor  Maximum Error Less Than 1 PPM in High-Resolution Mode ♦ l2Cי/SPIControlPort ♦ Configurable Auxiliary Output ♦ Flexible Sourcing of R٩frence Clock - External Oscillator or Clock Source  Supports Inexpensive Local Crystal ♦ Minimal Board Space Required 闗 No External Analog Loop-filter Components 3,3 V PC/SPi Software ontrol PC/SPI PLLQuIpuI_ Auxiliary Output LOCK indicaux 8 MHz to 75 MHz Low-Jitter Timlng Rǩfrence Al Fractional-N Frequency Synthesizer 6 to 75 MHZ PLL Output Ortput to InpU C*x*Rato " 50 Hz to 30 MHz Frequency Rf驩rence CXrfjXillo tnpm ClOCK RatfO CIRRUS LOGIC* Copyright © Cirrus Logic, Inc 2010 MAY 10 http://www.dmjs.com(** Heseived) DS761F2