Evaluation Board User Guide
UG-203
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
Evaluating the AD9550 Integer-N Clock Translator
FEATURES
Converts preset standard input frequencies to standard
output frequencies
Input frequencies from 8 kHz to 200 MHz
Output frequencies up to 810 MHz LVPECL and LVDS
(200 MHz CMOS)
Preset pin-programmable frequency translation ratios
On-chip VCO
Single-ended CMOS reference input
2 output clocks (independently programmable as LVDS,
LVPECL, or CMOS)
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
GENERAL DESCRIPTION
This user guide describes the hardware of the AD9550 eval-
uation board. The AD9550 evaluation board is a compact,
easy-to-use platform for evaluating all features of the AD9550
integer-N clock translator.
The AD9550 is a phase-locked loop (PLL) based clock trans-
lator designed to address the needs of wireline communication
and base station applications. The device employs an integer-N
PLL to accommodate the applicable frequency translation
requirements. It accepts a single-ended input reference signal
at the REF input.
The AD9550 is pin programmable, providing a matrix of
standard input/output frequency translations from a list of
15 possible input frequencies to a list of 52 possible output
frequency pairs (OUT1 and OUT2).
The AD9550 output is compatible with LVPECL, LVDS, or
single-ended CMOS logic levels, although the AD9550 is
implemented in a strictly CMOS process.
The AD9550 operates over the extended industrial temperature
range of ?40°C to +85°C.
Wireless infrastructure
Test and measurement (including handheld devices)
DIGITAL PICTURE OF THE AD9550 EVALUATION BOARD
Figure 1. AD9550 Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
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