Datasheet Analog Devices ADN2805

1.25 Gbps Clock and Data Recovery IC
ADN2805 Data Sheet
FEATURES GENERAL DESCRIPTION Locks to 1.25 Gbps NRZ serial data input
Patented clock recovery architecture
No reference clock required
Loss-of-lock indicator
I2C interface to access optional features
Single-supply operation: 3.3 V
Low power: 390 mW typical
5 mm × 5 mm 32-lead LFCSP, Pb free The ADN2805 provides the receiver functions of quantization
and clock and data recovery for 1.25 Gbps. The ADN2805
automatically locks to all data rates without the need for an
external reference clock or programming. All SONET jitter
requirements are met, including jitter transfer, jitter generation,
and jitter tolerance.
All specifications are specified for −40°C to +85°C ambient
temperature, unless otherwise noted. The ADN2805 is available
in a compact 5 mm × 5 mm 32-lead LFCSP. APPLICATIONS
GbE line card FUNCTIONAL BLOCK DIAGRAM
REFCLKP/REFCLKN
(OPTIONAL) LOL CF1 CF2 FREQUENCY
DETECT LOOP
FILTER PHASE …