Description

The AK2573A is a 1chip LDD(Laser Diode Driver)and an APC (Auto Power Control) for laser direct modulation application. It contains up to 156M LDD, programmable duty adjustment,BIAS and modulation currents, a digital feedback circuit, BIAS and modulation current monitors, failure alarms, I2CTM interface, an EEPROM for storing LD characteristics and user information,and TXFAULT detection for SFP application.

Features

- 1 chip 125M / 156M Laser Diode Driver (LDD) + Digital APC(APC_FF andAPC_FB)

- Programmable laser BIAS and modulation current controlled by an on-chip temperature sensor (APC_FF)

- Digital feedback circuit for APC(APC FB)

- Two current output 8bit DACs, I-DAC1: 85mA sink for modulation current I-DAC2: 54mA sinkfor BIAS current

- TXFAULT detection and1kbit IDField (EEPROM) for SFP(Small Form-factor Pluggable) support

- I2CTM compatible digital I/F

- Duty adjustment

- Power failure alarm(OPTALM), Overcurrent alarm (CURRALM), Temperature alarm (TEMPALM), Data alarm (DATAALM) and TXFAULT for failure alarm

- BIAS and modulation current monitors(*0.0095)

- Single 3.3V+/-0.2V operation

Applications

STM-1/OC-3(156Mbps) Optical Interface Module

TS–1000 (125Mbps) Optical Interface Module