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參數(shù)資料
| 型號： | MAX3736 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.2Gbps, Low-Power, Compact, SFP Laser Driver |
| 中文描述： | 3.2Gbps、低功耗、緊湊的SFP激光驅(qū)動器 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 341K |
| 代理商： | MAX3736 |
Detailed Description
The MAX3736 laser driver consists of three operational
blocks: a bias current generator, a modulation current
generator, and a high-speed modulation path. The
laser-biasing block includes a monitor output for bias-
sensing purposes. Both the bias and modulation gener-
ating blocks are enabled and disabled by the DIS pin.
The high-speed modulation path provides a 100
differential input resistance.
Bias Current Generator
To maintain constant average optical power, the
MAX3736 is designed to interface to a laser controller
IC. The laser controller IC controls the MAX3736, and
maintains a constant laser power using an automatic
power-control (APC) circuit. A back-facet photodiode,
mounted in the laser package, is used to convert the
optical power into a photocurrent. The laser controller
IC adjusts the laser bias current so the monitor photodi-
ode’s current matches the level programmed by the
user. It does this by adjusting the current sourced by
the MAX3736’s BIASSET pin. The MAX3736 reacts by
increasing or decreasing the laser current at BIAS.
Bias Current Monitor
The MAX3736 features a bias current monitor
(BC_MON). This monitor is realized by mirroring a frac-
tion of the bias current and developing a voltage
across an external resistor connected to ground. For
example, connecting a 100
resistor to ground gives
the following relationship:
V
BC_MON
= (I
BIAS
/ 73) x 100
. For compliance, the
voltage on BC_MON must be kept below 1.39V.
Modulation Current Generator
The laser’s modulation amplitude can be controlled by
placing a resistor from MODSET to ground. To set the
modulation amplitude, see the I
MOD
vs. R
MODSET
graph in the
Typical Operating Characteristics
. A more
advanced control scheme employs the use of a laser
controller IC to control modulation current to
stabilize the extinction ratio. For more information on
controlling the extinction ratio refer to Maxim
Application Note
HFAN-02.3.1: Maintaining Average
Power and Extinction Ratio, Part 1, Slope Efficiency and
Threshold Current
.
M
3.2Gbps, Low-Power, Compact,
SFP Laser Driver
_______________________________________________________________________________________
7
IN+
1.2V
1.2V
x85
x1
x85
DIS
V
CC
V
CC
V
CC
V
CC
V
CC
16k
82pF
7.2k
24k
50
50
BIASSET
MODSET
BIAS
BC_MON
IN-
OUT+
OUT-
MAX3736
Figure 4. Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3736ETE | 3.2Gbps, Low-Power, Compact, SFP Laser Driver |
| MAX3737ETJ | Full-Duplex LVDM Transceiver 8-MSOP -40 to 85 |
| MAX3737 | Multirate Laser Driver with Extinction Ratio Control |
| MAX3737EGJ | Multirate Laser Driver with Extinction Ratio Control |
| MAX3740A | Full-Duplex LVDM Transceiver 8-MSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3736E/D | 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 |
| MAX3736ETE | 功能描述:激光驅(qū)動器 3.2Gbps Low-Power SFP Laser Driver 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 |
| MAX3736ETE+ | 功能描述:激光驅(qū)動器 3.2Gbps Low-Power SFP Laser Driver 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 |
| MAX3736ETE+T | 功能描述:激光驅(qū)動器 3.2Gbps Low-Power SFP Laser Driver 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 |
| MAX3736ETE-T | 功能描述:激光驅(qū)動器 3.2Gbps Low-Power SFP Laser Driver 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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