GENERAL DESCRIPTION

Like the ADN2870, the ADN28721 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, 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.

FEATURES

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

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

ADN2872ACPZ属于集成电路（IC） > 激光驱动器。亚德诺半导体技术有限公司制造生产的ADN2872ACPZ激光驱动器激光驱动器电源管理集成电路 (PMIC) 可用于提供一个或多个受控电流源，以从标称恒定电压电源为半导体激光器件供电。产品通常支持通过监控受驱动的激光器件发出的光功率而得到反馈，可广泛应用于光通信系统中；并因具有对提供给用电设备的电流进行高频调制的能力，而与执行类似功能的器件区分开来。