ASAHI KASEI
[AK2570]
AK2570
Feed Forward APC LSI for LD Module
DESCRIPTION
AK2570 is the monolithic
CMOS LSI has the function of ‘ Feed Forward Automatic Power Control (APC)’ for the Laser Diode (LD) module and maintains the emission intensity of the LD module constant with the high accuracy.
For stabilizing the emission intensity of the LD module affected by the ambient temperature, AK2570 feeds the compensation
voltage from the 2channels - 8bits D to A converter to control the Bias- and the Modulation- current for the LD module.
The compensation
voltage corresponds to the temperature characteristic data of the LD module retained in the on-chip EEPROM and the ambient temperature detected ...