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ADN2813 Datasheet PDF : 28 Pages
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Data Sheet
Continuous Rate 10 Mb/s to 1.25 Gb/s Clock and
Data Recovery IC with Integrated Limiting Amp
ADN2813
FEATURES
Serial data input: 10 Mb/s to 1.25 Gb/s
Exceeds SONET requirements for jitter transfer/
generation/tolerance
Quantizer sensitivity: 3.3 mV typ
Adjustable slice level: ±95 mV
Patented clock recovery architecture
Loss-of-signal (LOS) detect range: 2.3 mV to 19 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: 450 mW typ
5 mm × 5 mm 32-lead LFCSP, Pb free
APPLICATIONS
SONET OC-1/-3/-12 and all associated FEC rates
Fibre Channel, GbE, HDTVs
WDM transponders
Regenerators/repeaters
Test equipment
Broadband cross-connects and routers
GENERAL DESCRIPTION
The ADN2813 provides the receiver functions of quantization,
signal level detect, and clock and data recovery for continuous
data rates from 10 Mb/s to 1.25 Gb/s. The ADN2813 automati-
cally 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 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 front-end, loss-of-signal (LOS) detector circuit
indicates when the input signal level has fallen below a user-
adjustable threshold. The LOS detect circuit has hysteresis to
prevent chatter at the output.
The ADN2813 is available in a compact 5 mm × 5 mm,
32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
REFCLKP/N
(OPTIONAL)
LOL
CF1
CF2 VCC VEE
SLICEP/N
PIN
NIN
2
QUANTIZER
FREQUENCY
DETECT
LOOP
FILTER
PHASE
SHIFTER
PHASE
DETECT
LOOP
FILTER
VCO
VREF
LOS
DATA
DETECT
RE-TIMING
2
2
THRADJ
LOS DATAOUTP/N CLKOUTP/N
ADN2813
Figure 1.
Rev. C
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