AK2574 Datasheet, PDF (9/30 Pages) Asahi Kasei Microsystems – 156M Laser Diode Driver + APC for Burst Mode

ASAHI KASEI
[AK2574]
7. BRST Timing (SEL=”H”, with CLK)
Item
Symbol Conditions
min
typ max Unit Remarks
DATA Set-up Time
Tsu
1.5
Note 1
DATA Hold Time
Th
1.0
BRST Set-up Time
Tsu-b
1.5
BRST Hold Time
Th-b
1.0
Delay Time of BRST “L” → “H” Tdr-bd
12.8 12.86
ns
to First DATA
Delay Time of Last DATA
to IBIAS OFF
Tdf-di Last Data=1
R_DAC2=0Fh
2
ns
IBIAS Overshoot
rib1 R_DAC2=0Fh
120 150
% Note 1
R_DAC2=2Fh
108
%
R_DAC2=FFh
98
%
IBIAS Error before 2ns
rib2 R_DAC2=0Fh
+/- 15 % Note 1
of First DATA
Delay Time of BRST “H”→”L” Tdf-bt R_DAC2=0Fh
16
ns
to TXACT OFF
Delay Time of First DATA
to TXACT Detection
Tdr-dt
Note 2
Note 1: This parameter is characterized and is not 100% tested.
Note 2: Depends on TXACT detection level, Monitor PD current, etc. For more information, see “VI. 3.1 TXACT”.
Th-b
BRSTP - BRSTN
Tsu-b
Tdr-bd
CLKP- CLKN
DATAP - DATAN
Tsu
Th
IBIAS Current
rib1
IMOD Current
TXACT
rib2
2ns
100% Nominal
Tdr-dt
Tdf-di
Tdf-bt
8. I-DAC1
Item
Condition
min
Resolution
Output Current with IMOD = VDD – 1.8V 76
Full Code
Current Supply with IMOD = VDD
Shutdown
1 LSB Current Step IMOD = VDD – 1.8V
DNL
IMOD = VDD – 1.8V -1
typ
max Unit Remark
8
bit
85
94
mA
100 uA TXDIS = “1”
0.333
mA
+1 LSB Code 20h to FFh
<MS0266-E-00>
-9-
2003/12