OUTLINES

The AK2572 enables to keep the optical power of the direct modulation LD (Laser Diode) constant by the APC (Automatic Power Control) circuit. It consists of a current programming function (APC_FF) responding to the temperature characteristics of each LD, and a Digital feedback function (APC_FB) to adjust the LD current based on the monitoring PD(Photo Diode) current.

FEATURES

■ Temperature compensation programming function (APC_FF) of Bias current (0~85mA) and Modulation current (0~10mA/0~2.2V) responding to the detected temperature by the On-chip temperature sensor.

■ Stable feedback function in the digital scheme (APC_FB).

■ SFP support TXFAULT function and 1k bit ID field (EEPROM UserArea).

■ LD Power leveling function by either Hardware pin control orRegister setting.

■ Various alarm functions of Optical output decline (OPTALM), Excessive LD current (CURRALM), Exceptional temperature (TEMPALM) and Irregular external signals(EXTALM1 and EXTALM2).

■ Operation adjustment function via 2-wire Digital interface after assembled into sub-system.

■ On-chipOscillator allows aSelf-runningoperation.

■ Single3.3 V[Typ.]powersupply.

APPLICATIONS

For LD modules applied to Continuous and Burst mode