CS2000-OTP datasheet(1/30 Pages) CIRRUS

Il numero della parte	CS2000-OTP

Spiegazioni elettronici	Fractional-N Clock Synthesizer & Clock Multiplier

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Produttore elettronici	CIRRUS [Cirrus Logic]

Homepage	http://www.cirrus.com

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Preliminary Product Information This document contains information for a new product.

Cirrus Logic reserves the right to modify this product without notice.

Fractional-N Clock Synthesizer & Clock Multiplier

Features

Delta-Sigma Fractional-N Frequency Synthesis

– Generates a Low Jitter 6 - 75 MHz Clock

from an 8 - 75 MHz Reference Clock

Clock Multiplier / Jitter Reduction

– Generates a Low Jitter 6 - 75 MHz Clock

from a Jittery or Intermittent 50 Hz to

30 MHz Clock Source

Highly Accurate PLL Multiplication Factor

– 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

– External Oscillator or Clock Source

– Supports Inexpensive Local Crystal

Minimal Board Space Required

– No External Analog Loop-filter

Components

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 “Ordering Information” on

page 30 for complete details.

Hardware Configuration

Auxiliary

Output

6 to 75 MHz

PLL Output

Frequency Reference

3.3 V

Hardware Control

8 MHz to 75 MHz

Low-Jitter Timing Reference

Fractional-N

Frequency Synthesizer

Digital PLL & Fractional

N Logic

Output to Input

Clock Ratio

N

Timing Reference

PLL Output

Lock Indicator

50 Hz to 30 MHz

Frequency Reference

Output to Input

Clock Ratio

JUN '08

DS758PP1

CS2000-OTP

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