Cirrus CS2300-01 1x, 2x, 4x, and 8x clock multiplier with internal lco Datasheet

CS2300-01
1x, 2x, 4x, and 8x Clock Multiplier with Internal LCO
Features
Ordering Information
 Clock Multiplier / Jitter Reduction
The CS2300-01 is available in a 10-pin MSOP package
in Commercial (-10°C to +70°C) grade. Customer development kits are also available for custom device
prototyping and device evaluation. Please see “Ordering Information” on page 2 for complete details.
–






Generates a Low Jitter 6 - 75 MHz Clock
from a Jittery 750 kHz to 30 MHz Clock
Source
Internal LCO Reference Clock
1 Hz Loop Filter Bandwidth
Selectable Multiplication Factors
– 1x, 2x, 4x, and 8x
Output Enable Pin
Lock Indicator
Minimal Board Space Required
– No External Analog Loop-filter
Components
Pin-Out Diagram
VD
1
10
GND
CLK_OUT
LOCK
2
9
3
8
4
7
CLK_IN
5
6
The CS2300-01 is an extremely versatile system clocking device that utilizes a programmable phase lock loop.
The CS2300-01 is based on a hybrid analog-digital PLL
architecture comprised of a unique combination of a
Delta-Sigma Fractional-N Frequency 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 750 kHz. The
CS2300-01 is a CS2300-OTP device that has been preconfigured at the factory. There are three hardware configuration pins available for mode and feature selection.
M1
0
0
1
1
M0
0
1
0
1
PLL_OUT
1x CLK_IN
2x CLK_IN
4x CLK_IN
8x CLK_IN
OUT_EN
CLK_OUT
0
Enabled
1
High Impedance
FILTP
LOCK
0.1 µF
LCO
FILTN
M1
M0
Fractional-N
Frequency Synthesizer
M[1:0]
00=1x
01=2x
10=4x
11=8x
CLK_IN
Advance Product Information
http://www.cirrus.com
CLK_OUT
N
OUT_EN
Output to Input
Clock Ratio
750 kHz to 30 MHz
Frequency Reference
M1
OUT_EN
FILTN
FILTP
Hardware Controls Settings
General Description
Ratio Selection
M0
1 Hz BW Digital PLL &
Fractional N Logic
PLL Lock
Indicator
6 MHz to 75 MHz
PLL Output
Output
Enable/Disable
VD
0.1 µF
1 µF
3.3 V
GND
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
AUG '08
PS846A4
CS2300-01
1. PIN DESCRIPTIONS
2. SPECIFICATIONS
Please see the CS2300-OTP datasheet for package information, device characteristics, and specifications except where noted due to specific programming options.
Pin Name
#
Pin Description
VD
1
Digital Power
GND
2
Ground
CLK_OUT
3
PLL Clock Output
LOCK
4
Active Low PLL Lock Indicator
CLK_IN
5
Clock Input
FILTP
FILTN
6
7
LCO Filter Connections
OUT_EN
8
Active Low CLK_OUT Enable Input
M1
M0
9
10
Mode Selection Inputs
3. OPERATIONAL INFORMATION
See the CS2300-OTP datasheet for additional pin description information.
Complete operational information can be found in the
CS2300-OTP datasheet. Specific operational details
dictated by the programming of the CS2300-01 are included below.
•
The PLL clock output is forced to 0 when the PLL is
unlocked, both upon loss of the CLK_IN signal or
briefly when switching mode pin configurations.
•
The minimum loop filter bandwidth once locked is
1 Hz.
4. CONFIGURATION INFORMATION
The CS2300-01 has been factory pre-programmed with a unique configuration. The following table outlines the specific configuration profile which can be compared to the CS2300-OTP datasheet for detailed functional descriptions.
OTP Modal and Global Configuration Parameters Form
Mode 0
Mode 1
Ratio 0 (dec)
1
2
Ratio 0 (hex)
00:10:00:00
00:20:00:00
RModSel1
0
0
RModSel0
0
0
AuxOutSrc1
1
1
AuxOutSrc0
1
1
AutoRMod
0
0
Global Configuration Set
ClkSkipEn AuxLockCfg ClkOutUnl LFRatioCfg
M2Cfg2
0
0
0
1
0
ClkIn_BW2 ClkIn_BW1 ClkIn_BW0
0
0
0
Mode 2
4
00:40:00:00
0
0
1
1
0
M2Cfg1
0
Mode 3
8
00:80:00:00
0
0
1
1
0
M2Cfg0
0
5. ORDERING INFORMATION
Product
Description
Package
Pb-Free
Grade
Temp Range Container
Rail
CS2300-01
Clocking Device
10L-MSOP
Yes
Commercial
-10° to +70°C
CDK-2000
Evaluation Platform
-
Yes
-
-
PS846A4
Order#
CS230001-CZZ
Tape and
CS230001-CZZR
Reel
-
CDK-2000-LCO
2
CS2300-01
6. REVISION HISTORY
Release
A1
Changes
Initial Release
A2
Corrected part number
A3
Reduced page count and updated formatting
A4
Updated formatting
Contacting Cirrus Logic Support
For all product questions and inquiries, contact a Cirrus Logic Sales Representative.
To find one nearest you, go to www.cirrus.com.
IMPORTANT NOTICE
“Advance” product information describes products that are in development and subject to development changes. Cirrus Logic, Inc. and its subsidiaries (“Cirrus”) believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS”
without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that
information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment,
including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use
of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of
Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or
other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent does not extend to other copying such
as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE
IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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or service marks of their respective owners.
PS846A4
3
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