AK2571 Datasheet, PDF (10/52 Pages) Asahi Kasei Microsystems – Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

AKM Confidential
AK2571
3.5 Modulation for dithering through I-DAC1
I-DAC1 has a modulation function for dithering. It’s added to the current of I-DAC1 and output through IOUT1. Its
function is available to set R_EA_SW.
Figure 3-3 shows the block diagram and Table 3-8 / 3-9 explains the setting
Figure 3-3 EA Block diagram
EA frequency
set
(R_EA_FREQ)
EA gain set
(R_EA_GAIN)
GAIN
I-DAC1
+
IOUT1
Table 3-8 EA Dithering frequency
R_EA_FREQ
(E_EA_FREQ)
Setting frequency (Typ)
000
16kHz
001
32kHz
010
64kHz
011
128kHz
100-111
256kHz
Table 3-9 Additional gain
R_EA_GAIN
(E_EA_GAIN)
Additional gain
00
16%
01
8%
10
4%
11
2%
Deviation (typ)
TBD
TBD
TBD
TBD
TBD
Deviation (typ)
TBD
TBD
TBD
TBD
Remarks
(Default)
Remarks
(Default)
<Rev. 0.6E Preliminary>
-10-
2001/11