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AD9553

更新时间: 2024-09-17 06:36:15
品牌 Logo 应用领域
亚德诺 - ADI 以太网时钟
页数 文件大小 规格书
44页 679K
描述
Flexible Clock Translator for GPON, Base Station, SONET/SDH, T1/E1, and Ethernet

AD9553 数据手册

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Flexible Clock Translator for GPON, Base  
Station, SONET/SDH, T1/E1, and Ethernet  
AD9553  
FEATURES  
GENERAL DESCRIPTION  
Input frequencies from 8 kHz to 710 MHz  
Output frequencies up to 810 MHz  
The AD9553 is a phase-locked loop (PLL) based clock translator  
designed to address the needs of passive optical networks (PON)  
Preset pin-programmable frequency translation ratios cover  
popular wireline and wireless frequency applications,  
including xDSL, T1/E1, BITS, SONET, and Ethernet.  
Arbitrary frequency translation ratios via SPI port  
On-chip VCO  
Accepts a crystal resonator for holdover applications  
Two single-ended (or one differential) reference input(s)  
Two output clocks (independently programmable as LVDS,  
LVPECL, or CMOS)  
SPI-compatible, 3-wire programming interface  
Single supply (3.3 V)  
Very low power: <450 mW (under most conditions)  
Small package size (5 mm × 5 mm)  
and base stations. The device employs an integer-N PLL to  
accommodate the applicable frequency translation requirements.  
The user supplies up to two single-ended input reference signals  
or one differential input reference signal via the REFA and REFB  
inputs. The device supports holdover applications by allowing the  
user to connect a 25 MHz crystal resonator to the XTAL input.  
The AD9553 is pin programmable, providing a matrix of  
standard input/output frequency translations from a list of 15  
possible input frequencies to a list of 51 possible output frequency  
pairs (OUT1 and OUT2). The device also has a 3-wire SPI  
interface, enabling the user to program custom input-to-output  
frequency translations.  
The AD9553 output is compatible with LVPECL, LVDS, or  
single-ended CMOS logic levels, although the AD9553 is  
implemented in a strictly CMOS process.  
Exceeds Telcordia GR-253 Category II OC-48 jitter  
generation, transfer, and tolerance specifications  
APPLICATIONS  
The AD9553 operates over the extended industrial temperature  
range of −40°C to +85°C.  
Cost effective replacement of high frequency VCXO, OCXO,  
and SAW resonators  
Extremely flexible frequency translation for SONET/SDH,  
Gb Ethernet, Fibre Channel, DRFI/DOCSIS, and  
PON/EPON/GPON  
Wireless infrastructure  
Test and measurement (including handheld devices)  
BASIC BLOCK DIAGRAM  
AD9553  
REFA  
REFB  
XTAL  
INPUT  
OUT2  
OUT1  
FREQUENCY  
SOURCE  
OUTPUT  
CIRCUITRY  
PLL  
SELECTOR  
PIN-DEFINED AND SERIAL PROGRAMMING  
Figure 1.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2010 Analog Devices, Inc. All rights reserved.  
 

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