AK2572 Datasheet, PDF (12/50 Pages) Asahi Kasei Microsystems – APC for Burst Mode Applicable Direct Modulation Laser Diode

ASAHI KASEI
[AK2572]
2. Operation Setting
The AK2572 can operate following functions as shown in Table 2-1 by EEPROM / Register setting. For further
details, please refer to the circuit description at the next page and thereafter.
Table 2-1 AK2572 Operation Setting
Set-up
RE_BURST_SET
0
RE_SFP_SET [*3]
0
1
RE_PWR_LVL1_SET [*3]
0
RE_PWR_LVL2_SET
0
RE_APC_FF_SET
00 ~ 11 （0 ~ 3）
RE_APC_FB_SET
00 ~ 11 （0 ~ 3）
RE_OPTALM_SET
0/1
RE_CURRALM_SET
0/1
Continuous mode
○
Burst mode
×
SFP_MSA support
○
×
Shutdown request
Logical sum (ORed)
of TXFAULT and TXDIS
TXDIS
Power leveling [1]
×
EXTALM2
/ MOD_CTRL-pin
EXTALM2
Power leveling [2]
×
APC_FF function
APC_FB function
OPTALM
□ ［*1］
□ ［*1］
□ ［*1］
CURRALM
□ ［*1］
1
1
0
1
1
0
11 （3）
0
0
0
×
○
×
Related setting
TXDIS
MOD_CTRL-pin
×
○
E_MOD_TCï¼»1ï¼½
E_MOD_TCï¼»2ï¼½
EXTALM2
MOD
_CTRL
RE_PWR_SEL
○
×
E_BIAS_TCï¼»0ï¼½~ï¼»3ï¼½
E_MOD_TCï¼»0ï¼½~ï¼»3ï¼½
○ ［*2］
× ［*2］
× ［*2］
RE_OPTALM
RE_TIMER_OPTALM
× ［*2］
E_CURRALM_BIAS_TC
E_CURRALM_MOD_TC
ï¼»*1ï¼½ These functions are determined by the corresponding EEPROM / Register setting. Therefore the operations
of “□“ depend on the user’s setting.
［*2］ In Burst mode setting (RE_BURST_SET＝“1”, RE_SFP_SET＝”1”), it is assumed that only APC_FF
function is used and no APC_FB function is used (Monitor PD, CURRALM and OPTALM are not used).
[*3] Setting of RE_SFP_SET＝“0” and R_PWR_LVL1_SET＝“1“ is prohibited.
-12-
<MS0290-E-01>
2004/8