资 源 简 介
The DS1862A is a closed-loop laser-driver control ICwith built-in digital diagnosTIcs designed for XFP MSA.The laser control funcTIon incorporates automaTIc powercontrol (APC) and allows exTInction ratio control thougha temperature-indexed lookup table (LUT). TheDS1862A monitors up to seven analog inputs, includingtemperature and monitor diode (MD) current, which areused to regulate the laser bias current and extinctionratio. Warning and alarm thresholds can be programmedto generate an interrupt if monitored signalsexceed tolerance. Calibration is also provided internallyusing independent gain and offset scaling registers foreach of the monitored analog signals. Settings such asprogrammed calibration data are stored in passwordprotectedEEPROM memory. Programming is accomplishedthrough an I2C-compatible interface, which canalso be used to access diagnostic functionality.ApplicationsLaser Control and Monitoring 10Gbps OpticalTransceiver Modules (XFP)Laser Control and MonitoringDigital Diagnostics in Optical Transmission
