參數(shù)資料
型號(hào)： AK2574
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 156M Laser Diode Driver + APC for Burst Mode
中文描述： 1.56激光二極管驅(qū)動(dòng)器apc的突發(fā)模式
文件頁(yè)數(shù)： 21/30頁(yè)
文件大?。?/td> 248K
代理商： AK2574
ASAHI KASEI
[AK2574]
<MS0266-E-00>
-21-
2003/12
Table 3-2 PDIN capacitance (CPDIN)
Item
PDIN Capacitance (CPDIN)
Table 3-3 TXACT Reference Voltage
RE_DAC_TXACT
min
typ
14
max
26
Unit
pF
Remark
txact_ref
typ
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
min
0.86
0.76
0.66
0.56
0.46
0.36
0.26
0.16
max
0.94
0.84
0.74
0.64
0.54
0.44
0.34
0.24
unit
V
V
V
V
V
V
V
V
Remarks
011
010
001
000
100
101
110
111
3.2 CLKALM
CLKALM is detected when input CLK is 0s or 1’s fixed more than 100ns (typ). The polarity of CLKALM can be set
by RE_CLKALM_POL (0: “H” at detection, 1: “L” at detection). AK2574 goes into “shutdown” (see 4. Shutdown)
when CLKALM is detected.
4. Shutdown
Table 4-1 shows the shutdown condition and Table 4-2 shows AK2574 operation at shutdown. AK2574 goes into
“Shutdown” when TXDIS request from TXDIS pin or CLKALM detection. Thepolarity of TXDIS can be set by
RE_TXDIS_POL (0: “H” shutdown, 1: “L” shutdown).
Table 4-1 Shutdown Condition
TXDIS (Note1)
1
0
0
Note 1: 1 means shutdown request from TXDIS pin.
Note 2: 1 means CLKALM detection.
CLKALM (Note2)
X
0
1
Operation
Shutdown
Normal Operation
Shutdown
Remarks
Shutdown by pin
Shutdown by CLKALM detection
Table 4-2 AK2574 operation at shutdown
Function
I-DAC1 /2 output
APC_FF
MOD Driver
BIAS Driver
CLKALM
TXACT
Operation
High-Z (0mA output)
Normal Operation
DATA=0
OFF (BRST=0)
Normal Operation
Hod non-detected poarity
Remarks
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