10.7 Gbps Electro-Absorption Modulator Driver
Preliminary Technical Data
Data Rates up to 10.709Gb/s
Typical Rise/Fall Time 27ps
Power Dissipation 900mW (at 2V swing, 1V offset)
Programmable Modulation Voltage up to 3V
Programmable Bias Offset Voltage up to 2V
Voltage-input control for offset, modulation
www.DataSheeCt4rUos.csoPmoint Adjust Range 30%- 85%
Selectable Data Retiming
PECL/CML Data & Clock Inputs
50Ω on Chip Data & Clock Terminations
|S11|<-10dB , |S22|<-8dB at 10GHz
Positive or negative 5.2 or 5.0V single supply operation
Available in dice and 4x4mm 24 Lead LFCSP package
The ADN2849 is a low power 10.7Gbps driver for electro-
absorption modulator (EAM) applications. The modulation
voltage is programmable via an external voltage up to a
maximum swing of 3V when driving 50Ω. The bias offset
voltage and output eye cross point are also programmable. On-
chip 50Ω resistor is provided for back termination of the
output. The ADN2849 is driven by AC coupled differential
CML level data and has selectable data retiming to remove jitter
from data input signal. The modulation voltage can be enabled
or disabled by driving the MOD_ENB pin with the proper logic
levels. It can operate with positive or negative (5.2V or 5.0V)
The ADN284949 is available in a compact 4x4mm plastic
package or dice format.
SONET OC-192 Optical Transmitters
SDH STM-64 Optical Transmitters
10Gb Ethernet IEEE802.3
XFP/X2/XENPACK/MSA-300 Optical Modules
CPAP CPAN MOD_SET
BIAS_SET GND VTERM MODN_TERM
VEE CLK_SELB MOD_ENB
Figure 1. Functional Block Diagram
Rev. Pr. G August 2004
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