ak2574 AKM Semiconductor, Inc., ak2574 Datasheet - Page 16
ak2574
Manufacturer Part Number
ak2574
Description
156m Laser Diode Driver Apc For Burst Mode
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK2574.pdf
(30 pages)
transition. To protect the last DATA, BRST 1$ 0 transition should be behind the last DATA input. Fig 2-6 illustrates
the timing example.
sensor (every 6&, Duty data is stored in E_DUTY_TC, see Table 6-3 for more information). Write same data into
E_DUTY_TC for constant duty adjustment. Table 2 -3 and 2-4 show the characteristics of duty adjustment function.
Fig 2-5 Input timing example with CLK
AK2574 operates without CLK when SEL=” L” . DATA input should be 12.8ns or more behind BRST = 0 $ 1
Fig 2-6 Input timing example without CLK
AK2574 supplies a programmed duty adjustment in response to the temperature from an on-chip temperature
ASAHI KASEI
2.2.3
2.3 Duty Adjustment
Table 2-3 Duty Adjustment characteristics
Note 1: This parameter is characterized and is not 100% tested.
Table 2-4 Pulse Extended
<MS0266-E-00>
BRSTP - BRSTN
DATAP - DATAN
DATAP - DATAN
Item
Maximum Pulse Extended
1 LSB Pulse Extended Step
Pulse Extended Stability
BRSTP - BRSTN
CLKP- CLKN
R_DUTY
Input Timing (SEL=” L” , in the case of direct DATA)
30
31
0
1
2
.
.
Pulse Extended (typ) [ns]
12.8ns (min)
2 CLK (typ)
Symbol
Tstep
Tsta
0.03
0.06
0.90
0.93
Td
0
.
.
min
0.5
(24bit included Guard Time)
(24bit include Guard Time)
Preamble + Delimiter
Preamble + Delimiter
Remark
0.03
typ
-16-
max
0.2
Unit
ns
ns
ns
Note 1
32 Steps
Ta=-40 to 85&, VDDDR=3.1'3.5V
0.3ns Extended (Note 1)
ATM Cell (53byte)
ATM Cell (53byte)
Remarks
[AK2574]
2003/12