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AK2571

Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

Asahi Kasei Microdevices 

AKM Confidential

Block Diagram

AK2571

AK2571 - Block Diagram -

RB (12k) BIAS

BIAS GEN

Monitor

PD

PDMON

Gain Adj

RPD PDIN

CPD

REFOUT

Regulator

EEPROM

Store the

parameter and

look up table

Rth

TEMPIN Gain &

OFFSET

Adj

RL

ADC

T-V

Conv.

WAVE1

WAVE0

SHUT_APCN

SHUT_ATCN

OSC

Digital I/F

MODE

STATUS

CSN SKN DI DO READY REG EEP

I-DAC1

IOUT1

IOUT2

APC

I-DAC2

I-DAC3

IOUT3

Driver

+

LD

Alarm Decision

STATUS_MON

TIMERALM

OPALM(Optical out down)

CUALM(Over Current)

TEMPALM(Temperature ALM

PIDALM(TECControl current ALM)

WLALM(Target Temperature ALM)

HEATP

PWM

or

COOLP

PID

Current

TEC

direction

control

COOLN

HEATN

Monitor

DAC

AMON

IOUT4H

I-DAC4

IOUT4C

Curret

Amp/

Bypass

<Rev. 0.6E Preliminary>

-2-

2001/11

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