参数资料
| 型号： | MAX3643ETG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/15页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 2.5GBPS 3.6V 24TQFN |
| 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： | 2.5Gbps |
| 通道数： | 1 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 32mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 70mA |
| 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： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
MAX3643
155Mbps to 2.5Gbps Burst-Mode Laser Driver
This approach can also be used for a conventional volt-
age DAC output, if desired. In all cases, the voltage at
MODSET must be kept ≤ 1.4V, which limits the range of
acceptable values for R MODSET depending on the maxi-
V CC
mum modulation current.
Laser diode bias current is set in the same manner as
modulation current.
Z O = 50 Ω
130 Ω
130 Ω
MAX3643
IN+/BEN+
LVPECL Data/Burst-Enable Inputs
The MAX3643 data and BEN inputs are biased with an
on-chip, high-impedance network. When DC-coupled,
LVPECL
Z O = 50 Ω
82 Ω
82 Ω
IN-/BEN-
the MAX3643 operates properly with signals that meet
the EC table input-swing and common-mode require-
ments, including LVPECL and most CML.
See Figure 3 for a termination network that can be used
to connect the data and BEN inputs to LVPECL data out-
puts. Other termination networks may also be used, as
long as both the input swing and common limits are met.
Sample-and-Hold Operation
When the MAX3643 internal sample-and-hold is not
required, the MDIN pin should be connected to ground
and the MDOUT pin unconnected. If the internal sample-
and-hold is required, then it is necessary to ensure that
Figure 3. LVPECL High-Speed Inputs
V CMBEN + (100mV to 800mV)
IN+
IN-
the time constant resulting from the monitor diode load
resistance and the total load capacitance is compatible
V CMBEN
BEN+
with the desired minimum burst interval. It is also neces-
sary to make certain that the load at MDOUT does not
exceed the capability of the MDOUT pin.
Because the voltage at MDIN is not reflected to MDOUT
V CMBEN - (100mV to 800mV)
3.3V
R 1 = 1.65k Ω
BEN-
MAX3643
until after the end of the laser burst, systems using the
internal sample-and-hold alone cannot support continu-
ous mode operation, often a required feature for module
calibration. In this case, the voltage at MDIN can also
be connected directly to a controller mux input. As long
as the total capacitance (including monitor diode intrin-
sic capacitance, MDIN capacitance, mux off-capaci-
tance, and wiring parasitics) is less than 50pF, and the
monitor diode load resistor is less than 2k Ω , then the
sample-and-hold captures a 576ns minimum burst. The
MAX3643 typical MDIN capacitance is 5pF, typical
monitor diode maximum capacitance is 25pF, and the
typical capacitance of a mux input in the off-state is
3pF to 5pF. When the mux is in the on-state, the capac-
itance at the input is typically 10pF to 20pF.
12
V CMBEN = +2.0V
R 2 = 2.54k Ω
Figure 4. Single-Ended Biasing for Burst Enable
If the minimum burst duration is longer than 576ns, it
may be useful to connect an external capacitor in par-
allel with the monitor diode load to limit the effects of
the data pattern on the monitor diode output.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3643EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3643 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 |
| MAX3643EVKIT+ | 功能描述:激光驱动器 evaluation kit for MAX3643ETG+ 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 |
| MAX3645EEE | 功能描述:限幅放大器 2.97-5.5V 125-200Mbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3645EEE+ | 功能描述:限幅放大器 2.97-5.5V 125-200Mbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3645EEE+T | 功能描述:限幅放大器 2.97-5.5V 125-200Mbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
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