Analog Devices Inc. ADN2872ACPZ

Laser Drivers 3.3V Dual-Loop 50Mbps-3.3Gbps
3.3V DUAL-LOOP, 50 MBPS TO 3.3 G
IC LASER DRVR 3.3GB 3.6V 24LFCSP
Laser Driver 3.3Gbps 1-CH 24-Pin LFCSP EP Tray
IC LSR DVR 3.3GBPS 3.3V 24LFCSP
French Electronic Distributor since 1988
Like the ADN2870, the ADN2872 laser diode driver is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The device features dual-loop control of the average power and extinction ratio (ER), which automatically compensates for variations in laser characteristics over temperature and aging. The laser needs only be calibrated at 25°C, eliminating the need for expensive and time consuming temperature calibration. The ADN2872 supports single-rate operation from 50 Mbps to 3.3 Gbps, or multirate operation from 155 Mbps to 3.3 Gbps. With a new alarm scheme, this device avoids the shutdown issue caused by the system transient generated from various lasers. The average power and ER can be set with a voltage provided by a microcontroller digital-to-analog converter (DAC) or by a trimmable resistor. The device provides both bias and modulation current monitoring, as well as fail alarms and automatic laser shutdown. The ADN2872, a SFF-/SFP-compliant laser diode driver, can work with the Analog Devices, Inc., ADuC7019, ADuC7020, and ADuC7023 MicroConverter® family and the ADN2890, ADN2891, and ADN2892 limiting amplifier family, to form a complete SFP/SFF transceiver solution. The ADN2872 is available in a space-saving 4 mm × 4 mm LFCSP specified over the −40°C to 85°C temperature range. APPLICATIONS Multirate OC3 to OC48-FEC SFP/SFF modules 1×/2×/4× Fibre Channel SFP/SFF modules LX-4 modules DWDM/CWDM SFP modules 1GE SFP/SFF transceiver modules