Continuous Rate 10 Mb/s to 675 Mb/s Clock and
Data Recovery IC with Integrated Limiting Amp
ADN2814
Data Sheet
FEATURES
GENERAL DESCRIPTION
Serial data input: 10 Mb/s to 675 Mb/s
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: 2.3 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: 435 mW typical
5 mm × 5 mm, 32-lead LFCSP, Pb free
The ADN2814 provides the receiver functions of quantization,
signal level detect, and clock and data recovery for continuous
data rates from 10 Mb/s to 675 Mb/s. The ADN2814 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 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 useradjustable threshold. The LOS detect circuit has hysteresis to
prevent chatter at the output.
APPLICATIONS
SONET OC-1/-3/-12 and all associated FEC rates
ESCON, Fast Ethernet, serial digital interfaces (DTV)
WDM transponders
Regenerators/repeaters
Test equipment
Broadband cross-connects and routers
The ADN2814 is available in a compact 5 mm × 5 mm,
32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
REFCLKP/REFCLKN
(OPTIONAL)
SLICEP/SLICEN
LOL
CF1
CF2
FREQUENCY
DETECT
2
LOOP
FILTER
VEE
LOOP
FILTER
PHASE
DETECT
VCC
PIN
NIN
QUANTIZER
PHASE
SHIFTER
VCO
VREF
DATA
RE-TIMING
2
2
THRADJ
LOS
DATAOUTP/
DATAOUTN
CLKOUTP/
CLKOUTN
ADN2814
04949-001
LOS
DETECT
Figure 1.
Rev. C
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