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AK2574VB Datasheet(PDF) 1 Page - Asahi Kasei Microsystems |
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AK2574VB Datasheet(HTML) 1 Page - Asahi Kasei Microsystems |
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1 / 30 page  ASAHI KASEI [AK2574] <MS0266-E-00> -1- 2003/12 AK2574 156M Laser Diode Driver + APC for Burst Mode Features - 156MLaserDiodeDriverforburstmodeapplication - BIAScurrentswitching - Programmable laser BIAS and modulation current controlled by an on-chip temperature sensor (APC_FF) - Twocurrentoutput8bitDACs, I-DAC1:85mAsinkformodulationcurrent I-DAC2:54mAsinkforBIAScurrent - Power failure alarm (TXACT), CLK failure alarm (CLKALM) - I2CTMcompatibledigitalI/F - Dutyadjustment - Single3.3V+/-0.2Voperation Applications ITU-TG.983ATM-PONONU I2CTMisatrademarkofPhilipsCorporation. Description The AK2574 is a 1chip LDD (Laser Diode Driver) and an APC (Auto Power Control) for burst mode application such as ATM-PON. It contains not only 156M LDD for modulatin current but also BIAS current switching, programmable BIAS and modulation currents, duty adjustment, I2CTM interface, an EEPROM for storing LD characteristics and user information. The AK2574 has an APC FF (Feed-forward) function that supplies a programmed current in response to the temperature. All program and operational functions can be set throughtheI2CTMcompatibleinterfaceandstoredinthe on-chipEEPROM. OrderingInformation ProductNumber PKG AK2574VB BCC++48(7mm*7mm) BlockDiagram APC_FF OSC IBIAS BIAS_ GEN BIAS RB (12k) TEMPSENS Monitor PD RPD CLK (LVPECL) DATA (LVPECL) MOD DRIVER LD TEMPMON Imod Digital I/F (I2CTM) SCL SDA* WP** TXDIS CONTROL DATAP DATAN CLKP CLKN IMODN IMOD *: Open Drain TXACT **: Pull-up BRST (LVPECL) BRSTP BRSTN CLK_ DET FF FF AND EEPROM BIAS DRIVER DUTY_ ADJ COMP (TXACT) DAC (TXACT) AND PDIN Ibias CLKALM I-DAC1 I-DAC2 ADC data data_ff clk brst brst_ff comp_out i_pd txact_ref SET/ RESET IBIASC1 IBIASC2 0.1uF 0.1uF SEL SEL 330 Ω IBIASR1 |
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