參數(shù)資料
型號： AK2574VB
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)動器apc的突發(fā)模式
文件頁數(shù)： 5/30頁
文件大小： 248K
代理商： AK2574VB
ASAHI KASEI
[AK2574]
<MS0266-E-00>
-5-
2003/12
Pin Description (Continued)
PIN#Symbol
27, 28 IMODN
Function
Negative MOD current output.
Sinks MOD current when input data is “L”.
Positive MOD current output.
Sinks up to 85mA (typ) MOD current when input data is “H”.
MOD current is adjusted with I-DAC1.
IMOD votage should be (VDD – 1.8V) or more.
VSS for MOD current drive circuit.
VSS for BIAS current drive circuit.
BIAS current output. Sinks up to 54mA (typ) current.
BIAS current is adjusted with I-DAC2.
IBIAS votage should be (VDD – 1.8V) or more.
VSS for BIAS current drive circuit.
Connect toVSS with 0.1uF
±
50% (in the operating temerature
range) capacitor.
No Connection. Connect tothe VSS (recommended) or leave open.
Connect toVSS with 0.1uF
±
50% (in the operating temerature
range) capacitor.
Connect to IBIASSC1 with 330
Ω
±
1% resistor.
Monitor PD votage input. Monitor PD current is converted tothe
votage with resistor.
TEMPMON
Temperature sensor monitor output.
I/O
Ao
Remark
29, 30 IMOD
Ao
31
32
33, 34 IBIAS
VSSMD
VSSBI
PWR
PWR
Ao
35
36
VSSBI
IBIASC1
PWR
Ao
37
38
NC
IBIASC2
Ao
39
40
IBIASR1
PDIN
Ao
Ai
41
Ao
AC load
≤
30pF
DC load
≥
50k
Ω
42
BIAS
BIAS reference for internal circuit. Connect to VSS with 12k
Ω
±
1% resistor.
Power supply for analog circuit.
VSS for analog circuit.
TXACT is set when PDIN votage beyond the reference votage
(DACAPC output) and is kept during BRST=”H”. TXACT is reset
when BRST is transient “H”
→
“L”. The polarity can be set with
EEPROM. TXACT is valid within 2ms after power-up.
Test input. Connect to VSS for normal operation
Ao
43
44
45
AVDD
AVSS
TXACT
PWR
PWR
Do
46
TEST1
Di
Connect to
VSS.
47
48
DVSS
DVDD
VSS for digital circuit.
Power supply for digital circuit.
PWR
PWR
Center PAD of PKG should be connected to the VSS for good electrical performance and radiation of heat.
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