AK2571 Datasheet, PDF (35/52 Pages) Asahi Kasei Microsystems – Single-Chip Automatic Power/Temperature Control for WDM Laser Diodes

AKM Confidential
AK2571
R_EA_FREQ[13:11] 3
R_APC_TRGT[6:0]
7
R_TEC_ANALOG[0] 1
R_PID_PWM[2:1]
2
R_PID_CTRL[5:4]
1
R_DAC_SET[10:8]
3
R_APC_FF_SET[0] 1
R_APC_FB_SET[3:1] 3
R_APC_CNT_SET[5:4] 2
R_TV_OFFSET[4:0] 5
R_MON_SET[3:0]
4
R_STATUS_SET[6:4] 3
R_ALM_SHUTDW[1:0] 2
R_ALM_POL[2]
1
E_OPALM_SET[10:8] 3
R_TIMER_SET[1:0] 2
R_TMPRT_TRGT[7:0] 8
R_CTRL_USR[7:0]
8
R_DAC1[7:0]
8
R_DAC2[7:0]
8
EA frequency set
1
APC Feedback
1
Reference voltage set
TEC Analog control select
1
PWM division set
1
Analog / PWM select
1
I-DAC enable
1
APC Feed forward select
1
APC Feedback added I-DAC 1
select
APC Count-up finalize I-DAC 1
select
Internal T_V conv. Offset 1
adjustment
MON-DAC output set
1
STATUS MON output set 1
ALM output set
1
ALM output polarity set
1
OPALM threshold set
1
TIMER ALM count period set 1
ATC target temperature set 2
Control register set
2
I-DAC1 set
2
I-DAC2 set
2
000010
000011
000100
000100
000100
000100
000101
000101
000101
000110
000111
000111
001000
001000
001000
001001
001010
001011
001100
001101
00: 16%, 01: 8%
10: 4%, 11: 2%
Refer table 3-8
000: 16k, 001: 32k, 010:
64k, 011: 128k, 100: 256k
0000000: 1.5V
1111111: 2.1V
4.8mV/step, refer table3-4
0: Analog-1way
1: Analog-2way
00: not divide
01: 32, 10:64, 11:128
0: Analog way
1: PWM way
0: disable
1: enable
[0]: I-DAC1
[1]: I-DAC2
[2]: I-DAC3
0: fixed value
1: compensation data
0: not addition
1: addition
[0]: I-DAC1
[1]: I-DAC2
[2]: I-DAC3
00: I-DAC1
01: I-DAC2
10: I-DAC3
11: disable
Refer table 3-10
AKM factory usage
Refer table 6-1
Refer table 6-2
0x: ALM enable
10: Fix not active polarity
11: Fix active polarity
0: ALM detect “H”
1: ALM detect “L”
000: 1/2, 001: 1/3
010: 1/4, 011: 1/5
100: 1/6, 101: 1/8
00: 8s, 01: 16s
10: 32s, 11: 64s
E_ATC_TRGT –
R_ATC_CMPNST
Refer 5.2.2
<Rev. 0.6E Preliminary>
-35-
2001/11