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参数资料
| 型号： | MAX3738ETG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC LASER DRIVER 4.25GBPS 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 4.25Gbps |
| 通道数： | 1 |
| 电源电压： | 2.97 V ~ 3.63 V |
| 电流 - 电源： | 47mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 100mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
| 产品目录页面： | 1423 (CN2011-ZH PDF) |
155Mbps to 4.25Gbps SFF/SFP Laser Driver
with Extinction Ratio Control
VOLTAGE
V IN+
SINGLE ENDED
100mV (min)
V IN-
1200mV (max)
1 μ F
(V IN+ ) - (V IN- )
DIFFERENTIAL
200mV (min)
MAX3738
21 Ω
OSCILLOSCOPE
CURRENT
2400mV (max)
OUT-
OUT+
BIAS-T
I OUT+
I MOD
21 Ω
BIAS-T
50 Ω
50 Ω
1 μ F
TIME
Figure 1. Required Input Signal and Output Polarity
HOST BOARD
Figure 2. Test Circuit for Characterization
MODULE
FILTER DEFINED BY SFP MSA
SOURCE
NOISE
L1
1 μ H
OPTIONAL
TO LASER
DRIVER V CC
VOLTAGE
SUPPLY
C1
0.1 μ F
C2
10 μ F
C3
0.1 μ F
OPTIONAL
Figure 3. Supply Filter
Detailed Description
The MAX3738 laser driver consists of three main parts:
a high-speed modulation driver, biasing block with
ERC, and safety circuitry. The circuit design is opti-
mized for high-speed, low-voltage (+3.3V) operation
(Figure 4).
High-Speed Modulation Driver
The output stage is composed of a high-speed differ-
ential pair and a programmable modulation current
source. The MAX3738 is optimized for driving a 15 Ω
load. The minimum instantaneous voltage required at
OUT- is 0.7V for modulation currents up to 60mA and
0.75V for currents from 60mA to 85mA. Operation
above 60mA can be accomplished by AC-coupling or
with sufficient voltage at the laser to meet the driver
output voltage requirement.
To interface with the laser diode, a damping resistor
(R D ) is required. The combined resistance damping
resistor and the equivalent series resistance (ESR) of
the laser diode should equal 15 Ω . To further damp
aberrations caused by laser diode parasitic induc-
tance, an RC shunt network may be necessary. Refer to
Application Note 274: HFAN-02.0: Interfacing Maxim
Laser Drivers with Laser Diodes for more information.
At high data rates, any capacitive load at the cathode of
a laser diode degrades optical output performance.
Because the BIAS output is directly connected to the
laser cathode, minimize the parasitic capacitance asso-
ciated with the pin by using an inductor to isolate the
BIAS pin parasitics from the laser cathode.
Extinction Ratio Control
The extinction ratio (r e ) is the laser on-state power
divided by the off-state power. Extinction ratio remains
constant if peak-to-peak and average power are held
constant:
r e = (2P AVG + P P-P ) / (2P AVG - P P-P )
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3738ETG+ | 功能描述:激光驱动器 155-4.25Gbps SFF/SFP w/Extinction RC RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3738ETG+GD0 | 功能描述:激光驱动器 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3738ETG+T | 功能描述:激光驱动器 155-4.25Gbps SFF/SFP w/Extinction RC RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3738ETG+TGD0 | 功能描述:激光驱动器 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3738ETG-T | 功能描述:激光驱动器 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
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