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参数资料
| 型号： | MAX3738ETG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/16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
Current Compliance (I MOD ≤ 60mA),
DC-Coupled
The minimum voltage at the OUT+ and OUT- pins
is 0.7V.
For:
V DIODE = Diode bias point voltage (1.2V typ)
R L = Diode bias point resistance (5 Ω typ)
R D = Series matching resistor (20 Ω typ)
For compliance:
V OUT+ = V CC - V DIODE - I MOD x (R D + R L ) -
I BIAS x R L ≥ 0.7V
Current Compliance (I MOD > 60mA),
AC-Coupled
For applications requiring modulation current greater
than 60mA, headroom is insufficient from proper opera-
tion of the laser driver if the laser is DC-coupled. To
avoid this problem, the MAX3738’s modulation output
can be AC-coupled to the cathode of a laser diode. An
external pullup inductor is necessary to DC-bias the
modulation output at V CC . Such a configuration isolates
laser forward voltage from the output circuitry and allows
the output at OUT+ to swing above and below the sup-
ply voltage (V CC ). When AC-coupled, the MAX3738
modulation current can be programmed up to 85mA.
Refer to Application Note 274: HFAN-02.0: Interfacing
V CC
MAX3738
Maxim Laser Drivers with Laser Diodes for more informa-
tion on AC-coupling laser drivers to laser diodes.
For compliance:
V OUT+ = V CC - I MOD / 2 x (R D + R L ) ≥ 0.75V
Determine C APC
The APC loop filter capacitor (C APC ) must be selected
to balance the requirements for fast turn-on and mini-
mal interaction with low frequencies in the data pattern.
The low-frequency cutoff is:
C APC (μF) ? 68 / (f 3dB (kHz) x ( η x ρ MON ) 1.1 )
High-frequency noise can be filtered with an additional
cap, C MD , from the MD pin to ground.
C MD ? C APC / 4
The MAX3738 is designed so turn-on time is faster than
1ms for most laser gain values ( η x ρ MON ). Choosing a
smaller value of C APC reduces turn-on time. Careful
balance between turn-on time and low-frequency cutoff
may be needed at low data rates for some values of
laser gain.
Interface Models
Figures 6 and 7 show simplified input and output cir-
cuits for the MAX3738 laser driver. If dice are used,
replace package parasitic elements with bondwire par-
asitic elements.
V CC
PACKAGE
16k Ω
PACKAGE
V CC
0.7nH
IN+
0.7nH
OUT-
0.11pF
0.11pF
V CC
5k Ω
0.7nH
OUT+
0.11pF
5k Ω
0.7nH
IN-
0.11pF
24k Ω
MAX3738
Figure 6. Simplified Input Structure
Figure 7. Simplified Output Structure
______________________________________________________________________________________
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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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