Analog Devices Inc. offers the ADN2847 and ADN2848 laser diode drivers, which operate from a single 3- to 3.6-V supply. Both feature modulation currents of up to 80 mA and bias currents of up to 100 mA. They manage output power by sensing transmitted optical signals and correcting them for variations caused by degradation or changes in operating temperature. The ADN2847 supports data rates from 50 Mb/s to 3.3 Gb/s, while the ADN2848 targets applications from 50 to 622 Mb/s. Together, the drivers are flexible and pin-to-pin compatible. Applications for these devices include SONET OC-3/12/48, Fibre Channel and Gigabit Ethernet modules.