APC for Burst Mode Applicable Direct Modulation Laser Diode
Description
ASAHI KASEI
[AK2572]
AK2572
APC for Burst Mode Applicable Direct Modulation Laser Diode
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 www.
DataSheet4U.
com (EEPROM User Area).
■LD Power leveling function by either Hardware pin control or Register 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-chip Oscillator allows a Self-running operation.
■ Single 3.
3 V [Typ.
] power supply.
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.
The AK2572 is also applicable to the Burst mode transmission.
The device equips a Power leveling function to switch a temperature compensation programming data by either Hardware pin control or Register setting.
The On-chip EEPROM (Non-volatile memory) allows to adjust and to keep the individual setting data for each LD characteristics via 2-wire Digital interface after being assembled into sub-system.
As 1k bits User Area is allocated in the EEPROM, which supports the ID field of the SFP specification, a proper operation required for the SFP module is realized by using the TXFAULT function.
APPLICATIONS
For LD modules applied to Continuous and Burst mode
ORDERING GUIDE
Product Number AK2572 Package Type QFN28 （5.
2mm×5.
2mm）...
Similar Datasheet
