Integer-N Clock Translator for Wireline Communications AD9550 FEATURES BASIC BLOCK DIAGRAM Converts preset standard input frequencies to standard output frequencies Input frequencies from 8 kHz to 200 MHz OUT2 OUTPUT REF PLL Output frequencies up to 810 MHz LVPECL and LVDS CIRCUITRY OUT1 (200 MHz CMOS) Preset pin-programmable frequency translation ratios On-chip VCO PIN DECODER Single-ended CMOS reference input AD9550 Two output clocks (independently programmable as LVDS, LVPECL, or CMOS) Figure 1. Single supply (3.3 V) Very low power: <450 mW (under most conditions) Small package size (5 mm 5 mm) Exceeds Telcordia GR-253-CORE jitter generation, transfer and tolerance specifications APPLICATIONS Cost effective replacement of high frequency VCXO, OCXO, and SAW resonators Flexible frequency translation for wireline applications such as Ethernet, T1/E1, SONET/SDH, GPON, xDSL Wireless infrastructure Test and measurement (including handheld devices) GENERAL DESCRIPTION The AD9550 is a phase-locked loop (PLL) based clock translator 15 possible input frequencies to a list of 52 possible output designed to address the needs of wireline communication and frequency pairs (OUT1 and OUT2). base station applications. The device employs an integer-N PLL The AD9550 output is compatible with LVPECL, LVDS, or to accommodate the applicable frequency translation requirements. single-ended CMOS logic levels, although the AD9550 is It accepts a single-ended input reference signal at the REF input. implemented in a strictly CMOS process. The AD9550 is pin programmable, providing a matrix of The AD9550 operates over the extended industrial temperature standard input/output frequency translations from a list of range of 40C to +85C. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 2010 Analog Devices, Inc. All rights reserved. 09057-001AD9550 TABLE OF CONTENTS Features .............................................................................................. 1 Input/Output Termination Recommendations .......................... 11 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 12 Basic Block Diagram ........................................................................ 1 Overview ..................................................................................... 12 General Description ......................................................................... 1 Preset Frequencies ...................................................................... 12 Revision History ............................................................................... 2 Description of Functional Blocks ............................................. 15 Specifications ..................................................................................... 3 Jitter Tolerance ............................................................................ 16 Output Characteristics ................................................................. 4 Low Dropout (LDO) Regulators .............................................. 16 Jitter Characteristics ..................................................................... 5 Automatic Power-On Reset ...................................................... 16 Absolute Maximum Ratings ............................................................ 6 Applications Information .............................................................. 17 ESD Caution .................................................................................. 6 Thermal Performance ................................................................ 17 Pin Configuration and Function Descriptions ............................. 7 Outline Dimensions ....................................................................... 18 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 18 REVISION HISTORY 8/10Revision 0: Initial Version Rev. 0 Page 2 of 20