CS2100-OTP
Fractional-N Clock Multiplier
Features
General Description
The CS2100-OTP is an extremely versatile system
clocking device that utilizes a programmable phase lock
loop. The CS2100-OTP is based on a hybrid analog-
digital PLL architecture comprised of a unique combina-
Clock Multiplier / Jitter Reduction
–
Generates a Low Jitter 6 - 75 MHz Clock
from a Jittery or Intermittent 50 Hz to
30 MHz Clock Source
tion of
a
Delta-Sigma Fractional-N Frequency
Highly Accurate PLL Multiplication Factor
Synthesizer and a Digital PLL. This architecture allows
for generation of a low-jitter clock relative to an external
noisy synchronization clock with frequencies as low as
50 Hz. The CS2100-OTP has many configuration op-
tions which are set once prior to runtime. At runtime
there are three hardware configuration pins available for
mode and feature selection.
–
Maximum Error Less Than 1 PPM in High-
Resolution Mode
One-Time Programmability
–
–
Configurable Hardware Control Pins
Configurable Auxiliary Output
Flexible Sourcing of Reference Clock
The CS2100-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 “Ordering Information” on
page 28 for complete details.
–
–
External Oscillator or Clock Source
Supports Inexpensive Local Crystal
Minimal Board Space Required
–
No External Analog Loop-filter
Components
3.3 V
Timing Reference
Frequency Reference
PLL Output
Hardware
Hardware Configuration
Control
Auxiliary
Output
Lock Indicator
8 MHz to 75 MHz
Low-Jitter Timing
Reference
Fractional-N
Frequency Synthesizer
6 to 75 MHz
PLL Output
N
50 Hz to 30 MHz
Frequency
Digital PLL &
Reference
Fractional N Logic
Output to Input
Clock Ratio
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Preliminary Product Information
Copyright © Cirrus Logic, Inc. 2008
JUN '08
DS841PP1
(All Rights Reserved)
http://www.cirrus.com