The ADN2872 is a dual-loop, 50 Mbps to 3.3 Gbps laser diode driver from Analog Devices that supports SFP/SFF and SFF-8472 MSA standards. It can be used for any rate from 50 Mbps to 3.3 Gbps applications. The device features dual-loop control of average power and extinction ratio, typical rise/fall time of 60 ps, bias current range of 2 mA to 100 mA, modulation current range of 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, and resistor setpoint control.
The ADN2872 laser diode driver from Analog Devices provides dual‑loop control of average optical power and extinction ratio for SFP and SFF transceiver modules. It supports data rates from 50 Mbps up to 3.3 Gbps, offers bias and modulation current monitoring, and includes laser‑FAIL alarm and automatic shutdown features.
The device is supplied in a 4 mm × 4 mm LFCSP package with an exposed paddle that must be grounded. Detailed specifications cover supply voltage, bias and modulation current ranges, timing parameters, absolute maximum ratings, and pin functions for integration with microcontrollers and optical modules.
| Supply Voltage (VCC) | 3.0 V to 3.6 V |
|---|---|
| Laser Bias Current (IBIAS) Output | 2 mA to 100 mA |
| Modulation Current (IMOD) Output | 5 mA to 90 mA |
| Typical Rise/Fall Time | 60 ps |
| Operating Temperature Range | -40 °C to +85 °C |
The device operates from a supply voltage of 3.0 V to 3.6 V.
The laser bias current can be set between 2 mA and 100 mA.
It is rated for industrial temperatures from –40 °C to +85 °C.
Typical rise and fall times are 60 ps.