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Cirrus Logic CS2200-OTP User Manual

Cs2200-otp, Fractional-n frequency synthesizer, Features

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Copyright

Cirrus Logic, Inc. 2010

(All Rights Reserved)

http://www.cirrus.com

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) and Automotive

(-40°C to +85°C) grades. Customer development kits

are also available for custom device prototyping, small

production programming, and device evaluation.

Please see

“Ordering Information” on page 23

for com-

plete details.

Auxiliary

Output

6 to 75 MHz

PLL Output

3.3 V

8 MHz to 75 MHz

Low-Jitter Timing

Reference

Output to Input

Clock Ratio

N

Timing Reference

PLL Output

PLL Lock Indicator

Fractional-N

Divider

Voltage Controlled

Oscillator

Internal

Loop Filter

Phase

Comparator

Delta-Sigma

Modulator

Hardware Configuration

Hardware Control

MAY '10

DS842F2

CS2200-OTP

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