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AK2573AVB 参数 Datasheet PDF下载

AK2573AVB图片预览
型号: AK2573AVB
PDF下载: 下载PDF文件 查看货源
内容描述: 125M / 156M激光二极管驱动器+ APC [125M / 156M Laser Diode Driver + APC]
分类和应用: 驱动器驱动程序和接口二极管激光二极管接口集成电路PC
文件页数/大小: 38 页 / 266 K
品牌: AKM [ ASAHI KASEI MICROSYSTEMS ]
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ASAHI KASEI  
[AK2573A]  
. Circuit Description  
1. Parameter Notation  
1.1 Parameter Definition  
In the AK2573A Circuit Description, in order to distinguish various pre-set parameter sources from EEPROM,  
Registers or Device pins, “Identifier - Main name” notation is used as shown in Table 1-1. For ease of operational  
description, small letters sometimes expresses internal signals.  
Table 1-1 Parameter Definitions  
Identifier Main Name  
Remark  
Example  
Register  
R_  
REGISTER name Indicates register  
(All Capital)  
R_APC_FB  
R_DAC1  
EEPROM  
E_  
EEPROM name  
(All Capital))  
REGISTER /  
EEPROM name  
(All Capital)  
Indicates EEPROM  
E_PDGAIN  
E_DAC1_FF_TC  
Ether or both Register  
or /and EEPROM  
RE_  
Indicates either register RE_DAC1_GAIN  
or EEPROM  
RE_APC_TRGT  
PIN  
P_  
PIN name  
(All Capital)  
P_PDMON  
BLOCK  
None  
BLOCK name  
(All Capital))  
I-DAC1  
APC_COMP  
Internal Node  
None  
signal name  
(small letter)  
vpd  
1.2 Operation Overview  
The AK2573A has 3 primary functions; 125M / 156M Laser diode driver part, APC (Automatic Power Control) part  
which supplies adequate bias current and modulation current to a Laser Diode, and the Control part to control  
operation modes of the AK2573A operation.  
There are 3 operation modes in the AK2573A. Since each adjusting function is controlled through I2CTM Interface, it  
realizes an automatic parameter adjustment.  
(1) Self-running Mode  
Self-running mode is ready for normal operation after all adjustments are completed. In this mode, temperature  
detection, EEPROM access and feeding current are automatically performed using the on-chip oscillator. The  
AK2573A works in this mode after power-on.  
(2) Adjustment Mode  
Adjustment mode is designed for training the LD characteristics. The AK2573A operates according to the register  
settings set through the I2CTM I/F.  
(3) EEPROM Mode  
EEPROM modeis used for storing LD characteristics into EEPROM via I2CTM I/F.  
<MS0189-E-01>  
-11-  
2004/5