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參數(shù)資料
| 型號： | MAX3738ETG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 其它接口 |
| 英文描述： | 1Gbps to 2.7Gbps SFF/SFP Laser Driver with Extinction Ratio Control |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC24 |
| 封裝： | 4 X 4 MM, QFN-24 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 403K |
| 代理商： | MAX3738ETG |
M
Average power is regulated using APC, which keeps
constant current from a photodiode coupled to the
laser. Peak-to-peak power is maintained by compen-
sating the modulation current for reduced slope effi-
ciency (h) of laser over time and temperature:
P
AVG
= I
MD
/
ρ
MON
P
P-P
=
η
x I
MOD
Modulation compensation from bias increases the mod-
ulation current by a user-selected proportion (K) need-
ed to maintain peak-to-peak laser power as bias
current increases with temperature. Refer to Maxim
Application Note
HFAN-02.21
for details:
K =
I
MOD
/
I
BIAS
This provides a first-order approximation of the current
increase needed to maintain peak-to-peak power.
Slope efficiency decreases more rapidly as tempera-
ture increases. The MAX3738 provides additional tem-
perature compensation as temperature increases past
a user-defined threshold (T
TH
).
1Gbps to 2.7Gbps SFF/SFP Laser Driver with
Extinction Ratio Control
8
_______________________________________________________________________________________
MAX3738
IN+
IN-
OUT-
OUT+
INPUT BUFFER
DATA
PATH
I
MOD
V
BG
R
MODSET
MODSET
V
BG
R
APCSET
APCSET
I
APCSET
C
APC
APCFILT1
APCFILT2
I
BIAS
BIAS
MD
V
CC
I
BIAS
ENABLE
x1
TX_FAULT
TX_DISABLE
SAFETY LOGIC
AND
POWER DETECTOR
R
BC_MON
BC_MON
V
CC
R
PC_MON
PC_MON
R
D
V
CC
I
MD
C
MD
SHUTDOWN
SHUTDOWN
x268
R
PULL
= 45k
T
xK
xTC
T > T
TH
I
BIAS
I
MOD
ENABLE
x1/2
MODTCOMP
R
MODTCOMP
TH_TEMP
R
TH_TEMP
MODBCOMP
R
MODBCOMP
I
BIAS
82
I
MD
1
Figure 4. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3738ETG+ | 功能描述:激光驅(qū)動器 155-4.25Gbps SFF/SFP w/Extinction RC RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3738ETG+GD0 | 功能描述:激光驅(qū)動器 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3738ETG+T | 功能描述:激光驅(qū)動器 155-4.25Gbps SFF/SFP w/Extinction RC RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3738ETG+TGD0 | 功能描述:激光驅(qū)動器 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3738ETG-T | 功能描述:激光驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
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