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REV. PrA May 20, 2002
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Preliminary Technical Data ADN2819
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002
Multi-Rate to 2.7Gb/s Clock and Data
Recovery IC with Integrated Limiting
Amp
Figure 1. ADN2819 Block Diagram
Level
Detect
Quantizer
2
SLICEP/N
PIN
NIN
Phase
Shifter
Phase
Det.
Loop
Filter
Σ
VCO
Data
Re-Timing
Divider
1/2/4/16
Loop
Filter
2
2
Fractional
Divider
XTAL
Osc
Frequency
Lock
Detector
3
CF1
CF2
LOL
/n
REFSEL
2
REFSEL[0..1]
2
REFCLKP/N
XO1
XO2
SEL[0..2]
THRADJ SDOUT DATAOUTP/N CLKOUTP/N
VREF
VCC
VEE
FEATURES
Meets SONET Requirements for Jitter Transfer /
Generation / Tolerance
Quantizer Sensitivity: 4 mV typical
Adjustable Slice Level: +/- 100 mV
1.9GHz minimum Bandwidth
Patented Clock Recovery Architecture
Loss of Signal Detect Range: TBD to 15mV
Single Reference Clock Frequency for all rates,
including 15/14 (7%) Wrapper Rate
Choice of 19.44, 38.88, 77.76 or 155.52MHz REFCLK.
LVPECL / LVDS / LVCMOS / LVTTL compatible
inputs (LVPECL / LVDS only at 155.52 MHz)
19.44MHz Oscillator on chip to be used with external
crystal
Loss of Lock indicator
Loopback mode for High Speed Test Data
Output Squelch & Bypass features
Single Supply Operation: 3.3 Volts
Low Power: 540mW Typical
7 x 7 mm 48 pin LFCSP
APPLICATIONS
SONET OC-3/12/48, SDH STM-1/4/16, GbE and 15/14
FEC rates
WDM Transponders
Regenerators/Repeaters
Test Equipment
Backplane Applications
PRODUCT DESCRIPTION
The ADN2819 provides the receiver functions of Quantization,
Signal Level Detect and Clock and Data Recovery at rates of
OC-3, OC-12, OC-48, Gigabit Ethernet and 15/14 FEC rates.
All SONET jitter requirements are met, including: Jitter Trans-
fer; Jitter Generation; and Jitter Tolerance. All specifications
are quoted for -40 to 85C ambient temperature unless other-
wise noted.
The device is intended for WDM system applications and can
be used with either an external reference clock or an on-chip
oscillator with external crystal. Both native rates and 15/14 rate
digital wrappers are supported by the ADN2819, without any
change of reference clock.
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 Signal Detect circuit indicates when the
input signal level has fallen below a user adjustable threshold.
The Signal Detect has typically TBD hysteresis to prevent
chatter at the output.
The ADN2819 is available in a compact 7x7 mm 48 pin chip
scale package.
PRELIMINARY TECHNICAL DATA
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