AK2574 Datasheet, PDF (10/30 Pages) Asahi Kasei Microsystems – 156M Laser Diode Driver + APC for Burst Mode

ASAHI KASEI
[AK2574]
9. I-DAC2
Item
Resolution
Maximum Output
Current
Minimum Output
Current 1
Minimum Output
Current 2
Condition
min
IBIAS = VDD – 1.8V 48
R_DAC2=FFh
IBIAS = VDD
1 ≤ R_DAC2 ≤ 5
IBIAS = VDD
R_DAC2 = 0
Current Supply with IBIAS = VDD
Shutdown
1 LSB Current Step IBIAS = VDD – 1.8V
DNL
IBIAS = VDD – 1.8V -1
typ
max Unit Remark
8
bit
54
60
mA
1.06
1.2 mA R_DAC2 = 1 to 5
0
mA R_DAC2 = 0
100 uA TXDIS = “1”
0.212
mA
+1 LSB Code 20h to FFh
10. Duty Cycle Adjustment
Item
Maximum Pulse Extended
1 LSB Pulse Extended Step
Pulse Extended Stability
Condition
0.3ns Extended
Ta=-40 to 85℃,
VDD=3.1～3.5V
min
typ max Unit
Remarks
0.5
ns Note 1
0.03
ns 32 Steps
0.2
ns Note 1
Note 1: This parameter is characterized and is not 100% tested.
11. DAC (TXACT)
Item
Resolution
Output Voltage
Condition
min
typ
max Unit Remarks
3
bit
R_CMPTH[2:0]=011
0.86
0.9
0.94
V
R_CMPTH[2:0]=010
0.76
0.8
0.84
V
R_CMPTH[2:0]=001
0.66
0.7
0.74
V
R_CMPTH[2:0]=000
0.56
0.6
0.64
V
R_CMPTH[2:0]=100
0.46
0.5
0.54
V
R_CMPTH[2:0]=101
0.36
0.4
0.44
V
R_CMPTH[2:0]=110
0.26
0.3
0.34
V
R_CMPTH[2:0]=111
0.16
0.2
0.24
V
12. PDIN Capacitance
Item
PDIN Capacitance
Condition
min
typ
max
Unit
Remarks
14
26
pF
13. BIASGEN
Item
BIAS pin Voltage
Condition
min
typ
max
Unit
Remark
1.2
V
14. Temperature Sensor
Item
Voltage Slope
Condition
min
TEMPMON Voltage -12.14
Offset Adjustment Target Ta = 35℃
Note 1: This parameter is characterized and is not 100% tested.
typ
-11.56
1.215
max
-10.98
Unit
mV / ℃
V
Remark
Note 1
<MS0266-E-00>
-10-
2003/12