CS2200-OTP_09 Datasheet, PDF (1/24 Pages) Cirrus Logic – Fractional-N Frequency Synthesizer

CS2200-OTP
Fractional-N Frequency Synthesizer
Features
 Delta-Sigma Fractional-N Frequency Synthesis
– Generates a Low Jitter 6 - 75 MHz Clock
Relative to 8 - 75 MHz Reference Clock
 Highly Accurate PLL Multiplication Factor
– Maximum Error Less Than 1 PPM
 One-Time Programmability
– Configurable Hardware Control Pins
– Configurable Auxiliary Output
 Flexible Sourcing of Reference Clock
– External Oscillator or Clock Source
– Supports Inexpensive Local Crystal
 Minimal Board Space Required
– No External Analog Loop-filter
Components
General Description
The CS2200-OTP is an extremely versatile system
clocking device that utilizes a programmable phase lock
loop. The CS2200-OTP is based on an analog PLL ar-
chitecture comprised of a Delta-Sigma Fractional-N
Frequency Synthesizer. This architecture allows for fre-
quency synthesis and clock generation from a stable
reference clock. The CS2200-OTP has many configura-
tion options which are set once prior to runtime. At
runtime there are three hardware configuration pins
available for mode and feature selection.
The CS2200-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 23 for complete details.
Hardware Control
Hardware Configuration
3.3 V
Timing Reference
PLL Output
PLL Lock Indicator
8 MHz to 75 MHz
Low-Jitter Timing
Reference
http://www.cirrus.com
Phase
Comparator
Internal
Loop Filter
Voltage Controlled
Oscillator
Fractional-N
Divider
N
Delta-Sigma
Modulator
Output to Input
Clock Ratio
Copyright  Cirrus Logic, Inc. 2009
(All Rights Reserved)
Auxiliary
Output
6 to 75 MHz
PLL Output
AUG '09
DS842F1