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ADN2804 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADN2804
Description  622 Mbps Clock and Data Recovery IC with Integrated Limiting Amplifier
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADN2804 Datasheet(HTML) 1 Page - Analog Devices

 
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622 Mbps Clock and Data Recovery IC
with Integrated Limiting Amplifier
ADN2804
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Exceeds SONET requirements for jitter transfer/
generation/tolerance
Quantizer sensitivity: 3.3 mV typical
Adjustable slice level: ±95 mV
Patented clock recovery architecture
Loss-of-signal (LOS) detect range: 2.6 mV to 18.4 mV
Independent slice level adjust and LOS detector
No reference clock required
Loss-of-lock indicator
I2C® interface to access optional features
Single-supply operation: 3.3 V
Low power: 423 mW typical
5 mm × 5 mm, 32-lead LFCSP, Pb free
APPLICATIONS
BPON ONT
SONET OC-12
WDM transponders
Regenerators/repeaters
Test equipment
Broadband cross-connects and routers
GENERAL DESCRIPTION
The ADN2804 provides the receiver functions of quantization,
signal level detect, clock and data recovery, and data retiming
for 622 Mbps NRZ data. The ADN2804 automatically locks to
622 Mbps data without the need for an external reference clock
or programming. In the absence of input data, the output clock
drifts no more than ±5%. All SONET jitter requirements are
met, including jitter transfer, jitter generation, and jitter
tolerance. All specifications are quoted for −40°C to +85°C
ambient temperature, unless otherwise noted.
This device, together with a PIN diode and a TIA preamplifier,
can implement a highly integrated, low cost, low power fiber
optic receiver.
The receiver’s front-end loss-of-signal (LOS) detector circuit
indicates when the input signal level falls below a user-adjustable
threshold. The LOS detect circuit has hysteresis to prevent chatter
at the output.
The ADN2804 is available in a compact 5 mm × 5 mm,
32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
2
SLICEP/SLICEN
LOL
DATAOUTP/
DATAOUTN
LOS
THRADJ
CLKOUTP/
CLKOUTN
ADN2804
2
VCC
VEE
CF1
CF2
PIN
NIN
VREF
QUANTIZER
VCO
PHASE
SHIFTER
PHASE
DETECT
FREQUENCY
DETECT
LOS
DETECT
DATA
RE-TIMING
LOOP
FILTER
LOOP
FILTER
REFCLKP/REFCLKN
(OPTIONAL)
2
Figure 1.


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