參數(shù)資料
型號(hào)： 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(dòng)器
文件頁數(shù)： 18/38頁
文件大?。?/td> 286K
代理商： AK2573AVB
ASAHI KASEI
[AK2573A]
<MS0189-E-01>
-18-
2004/5
Fig 4-7 APC example-4 (MOD=FF+FB, BIAS=FF) Fig 4-8 APC example-5 (MOD=FF, BIAS=FF+FB)
Ibias
R_APC_FB
54/255
G_DAC1
G_DAC2
85/255
Imod
R_DAC1
R_DAC2_FB
= 0
RE_DAC1_GAIN
RE_DAC2_GAIN
G_DAC1/G_DAC2 = 1 or 0.5
I-DAC1
I-DAC2
+
R_DAC1_FB = R_APC_FB
R_DAC2
+
R_DAC2_FF
R_DAC1_FF
1
R_DAC1_FB
=
R_APC_FB
R_DAC1 = R_DAC1_FF + R_DAC1_FB
R_DAC2 = R_DAC2_FF
0
Ibias
R_APC_FB
54/255
G_DAC1
G_DAC2
85/255
1
Imod
R_DAC1
R_DAC2_FB
= R_APC_FB
RE_DAC1_GAIN
RE_DAC2_GAIN
G_DAC1/G_DAC2 = 1 or 0.5
I-DAC1
I-DAC2
+
R_DAC2_FB = R_APC_FB
R_DAC2
+
R_DAC2_FF
R_DAC1_FF
0
R_DAC1_FB
= 0
R_DAC1 = R_DAC1_FF
R_DAC2 = R_DAC2_FF + R_DAC2_FB
Fig 4-9 APC example-6 (MOD=FF+FB, BIAS=FB) Fig 4-10 APC example-7 (MOD=FB, BIAS=FF+FB)
Ibias
R_APC_FB
54/255
G_DAC1
G_DAC2
85/255
1
Imod
R_DAC1
R_DAC2_FB
= R_APC_FB
RE_DAC1_GAIN
RE_DAC2_GAIN
G_DAC1/G_DAC2 = 1 or 0.5
I-DAC1
I-DAC2
+
R_DAC1_FB = K_DAC1_FBRT * R_APC_FB
R_DAC2
+
R_DAC2_FF = 0
R_DAC1_FF
K_DAC1_
FBRT
R_DAC1_FB
R_DAC1_FBRT
(E_DAC_FBRT_FIX)
R_DAC1 = R_DAC1_FF + R_DAC1_FB
R_DAC2 = R_DAC2_FB = R_APC_FB
Ibias
R_APC_FB
54/255
G_DAC1
G_DAC2
85/255
Imod
R_DAC1
R_DAC2_FB
RE_DAC1_GAIN
RE_DAC2_GAIN
G_DAC1/G_DAC2 = 1 or 0.5
I-DAC1
I-DAC2
+
R_DAC2_FB = K_DAC2_FBRT * R_APC_FB
R_DAC2
+
R_DAC2_FF
R_DAC1_FF =
0
1
R_DAC1_FB
=
R_APC_FB
R_DAC1 = R_DAC1_FB = R_APC_FB
R_DAC2 = R_DAC2_FF + R_DAC2_FB
K_DAC2_
FBRT
R_DAC2_FBRT
(E_DAC_FBRT_FIX)
Table 4-5 EEPROM Assignments for typical operation
RE_APC_
FF_SET
FB_SET
01
10
RE_APC_
RE_APC_
INIT_SET
0
1
0
1
x
x
x
0
1
0
1
x
x
E_DAC2_TC
E_DAC1_TC
I-DAC2
(BIAS)
FB
FB
FF
FF
FF
FF
FF+FB
FB
FB
FF+FB
FF+FB
I-DAC1
(MOD)
-
E_DAC1_FF_TC
E_DAC1_FF_TC
-
E_APC_INIT_TC
E_DAC1_FF_TC
E_DAC1_FF_TC
E_DAC1_FF_TC
E_DAC1_FF_TC
E_DAC1_FF_TC
-
E_APC_INIT_TC
Prohibit
FF
FF
FB
FB
FF
E_APC_INIT_TC
E_DAC2_FF_TC
E_DAC2_FF_TC
E_DAC2_FF_TC
E_DAC2_FF_TC
E_DAC2_FF_TC
-
E_APC_INIT_TC
E_DAC2_FF_TC
E_DAC2_FF_TC
10
01
11
11
11
01
01
10
10
00
11
00
01
10
11
11
11
11
11
11
FF+FB
FF
FF+FB
FF+FB
FB
FB
E_DAC1_FF_TC: I-DAC1 current data (temperature compensated)
E_DAC2_FF_TC: I-DAC2 current data (temperature compensated)
E_APC_INIT_TC: R_APC_FB initial data (temperature compensated)
Table 4-6 APC FB Operation
RE_APC_
FB_SET
FF_SET
00
01
10
11
RE_APC_
K_DAC1_FBRT
0
1
0
-
K_DAC2_FBRT
0
0
1
-
1
R_DAC2_FBRT/32/G_DAC2 R_DAC2_FBRT=E_DAC_FBRT
-
Prohibit
Remark
NoFB
FB for MOD
FB for BIAS
Prohibit
R_DAC1_FBRT=E_DAC_FBRT
XX
XX
XX
00
01
10
11
R_DAC1_FBRT*1.25/64/G_DAC1
1
-
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