參數(shù)資料
型號： AK2573AVB
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 125M / 156M Laser Diode Driver + APC
中文描述： 1.25億/ 1.56 apc的激光二極管驅(qū)動器
文件頁數(shù)： 12/38頁
文件大?。?/td> 286K
代理商： AK2573AVB
ASAHI KASEI
[AK2573A]
<MS0189-E-01>
-12-
2004/5
2. Driver
Fig 2-1 illustrates the block diagram of the driver function.
AK2573A has twocurrent DACs, I-DAC1 and I-DAC2. I-DAC1 is for modulation current and I-DAC2 is for bias
current. Table 1-1 and 1-2 show I-DAC1, I-DAC2 characteristics.
Fig 2-1 Driver Block Diagram
I-DAC2
LD
Ibias
Driver
AK2573A
I-DAC1
IBIAS
IMOD
IMODN
Imod
(1) I-DAC1 (Table 2-1)
RE_DAC1_
GAIN
DAC1_GAIN
Output current @
Full code (typ)
85 mA
43 mA
Output Current
Range (typ)
0 to85 mA
0 to 43 mA
Current step /
LSB (typ)
0.333 mA
0.169 mA
1
0
1
1/2
(2) I-DAC2 (Table 2-2)
RE_DAC2_
GAIN
DAC2_GAIN
Output current @
Full code (typ)
54 mA
27 mA
Output Current
Range (typ)
0 to54 mA
0 to 27 mA
Current step /
LSB (typ)
0.212 mA
0.106 mA
1
0
1
1/2
(3) I-DAC1 /I-DAC2 Common Characteristics
Resolution: 8bit
DNL: +/- 1 LSB @ code = 20h to FFh
3. DATA /CLK I/F (LVPECL)
The AK2573A supports direct data or latched data input (see Table 3-1). Connect CLKP = VSS, and connect CLKN
= VDD or leave open when SEL = “L”.
Table 3-1 Data input
SEL (CMOS)
“L”
“H”
Direct data
Latched data with clock
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