CS2000-OTP
Fractional-N Clock Synthesizer & Clock Multiplier
Features
Delta-Sigma Fractional-N Frequency Synthesis
General Description
The CS2000-OTP is an extremely versatile system
clocking device that utilizes a programmable phase lock
loop. The CS2000-OTP is based on a hybrid analog-
digital PLL architecture comprised of a unique combina-
tion of a Delta-Sigma Fractional-N Frequency
Synthesizer and a Digital PLL. This architecture allows
for both frequency synthesis/clock generation from a
stable reference clock as well as generation of a low-jit-
ter clock relative to an external noisy synchronization
clock with frequencies as low as 50 Hz. The CS2000-
OTP has many configuration options which are set once
prior to runtime. At runtime there are three hardware
configuration pins available for mode and feature
selection.
The CS2000-OTP is available in a 10-pin MSOP pack-
age in Commercial (-10°C to +70°C) grade. Customer
development kits are also available for custom device
prototyping, small production programming, and device
evaluation. Please see
for complete details.
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Generates a Low Jitter 6 - 75 MHz Clock
from an 8 - 75 MHz Reference Clock
Generates a Low Jitter 6 - 75 MHz Clock
from a Jittery 50 Hz to 30 MHz Clock
Source
Maximum Error Less Than 1 PPM in High-
Resolution Mode
Configurable Hardware Control Pins
Configurable Auxiliary Output
External Oscillator or Clock Source
Supports Inexpensive Local Crystal
No External Analog Loop-filter
Components
Clock Multiplier / Jitter Reduction
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Highly Accurate PLL Multiplication Factor
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One-Time Programmability
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Flexible Sourcing of Reference Clock
Minimal Board Space Required
3.3 V
Timing Reference
Frequency Reference
PLL Output
Lock Indicator
Hardware Control
Hardware Configuration
Auxiliary
Output
8 MHz to 75 MHz
Low-Jitter Timing Reference
Fractional-N
Frequency Synthesizer
6 to 75 MHz
PLL Output
Output to Input
Clock Ratio
N
50 Hz to 30 MHz
Frequency Reference
Digital PLL & Fractional
N Logic
Output to Input
Clock Ratio
Copyright
Cirrus Logic, Inc. 2009
(All Rights Reserved)
AUG '09
DS758F1
CIRRUS [ CIRRUS LOGIC ]
