Features and Benefits
- SFP/SFF and SFF-8472 MSA compliant
- SFP reference design available
- Any rate from 50 Mbps to 3.3 Gbps operation
- Dual-loop control of average power and extinction ratio
- Typical rise/fall time: 60 ps
- Bias current range: 2 mA to 100 mA
- Modulation current range: 5 mA to 90 mA
- Laser FAIL alarm and automatic laser shutdown (ALS)
- Bias and modulation current monitoring
- 3.3 V operation
- 4 mm × 4 mm LFCSP
- Voltage setpoint control
- Resistor setpoint control
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.
- 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
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.