参数资料
| 型号： | MAX3737ETJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC LSR DRVR 2.7GBPS 3.63V 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 2.7Gbps |
| 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： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
Multirate Laser Driver with Extinction
Ratio Control
VOLTAGE
V CC
V CC
V IN +
V IN -
SINGLE ENDED
100mV (MIN)
1200mV (MAX)
MAX3737
30 Ω
30 Ω
OUT-
Z 0 = 30 Ω
(V IN +) - (V IN -)
DIFFERENTIAL
200mV P-P (MIN),
OUT-
0.5pF
30 Ω
2400mV (MAX)
CURRENT
I OUT +
I MOD
OUT+
OUT+
I OUT+
Z 0 = 30 Ω
75 Ω
Z 0 = 50 Ω
50 Ω
TIME
Figure 1. Required Input Signal and Output Polarity
HOST BOARD
Figure 2. Test Circuit for Characterization
MODULE
OSCILLOSCOPE
SOURCE
NOISE
FILTER DEFINED BY SFP MSA
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
P AVG =
Detailed Description
The MAX3737 laser driver consists of three main parts: a
high-speed modulation driver, biasing block with ERC,
and safety circuitry. The circuit design is optimized 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 MAX3737 is optimized for driving a 15 Ω
load. The minimum instantaneous voltage required at
OUT+ is 0.7V for modulation current 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 due to the series
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 data rates of 2.7Gbps, any capacitive load at the
cathode of a laser diode degrades optical output perfor-
mance. Because the BIAS output is directly connected
to the laser cathode, minimize the parasitic capacitance
associated 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 )
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 ( η ) of the laser over time and temperature:
I MD
ρ MON
P P-P = η x I MOD
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3737EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3737 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 | 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 |
| 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 |
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