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参数资料
| 型号： | MAX3996CTP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 2.5GBPS 5.5V 20TQFN |
| 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： | 2.5Gbps |
| 通道数： | 1 |
| 电源电压： | 3 V ~ 5.5 V |
| 电流 - 电源： | 52mA |
| 电流 - 调制： | 40mA |
| 电流 - 偏置： | 60mA |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
3.0V TO 5.5V
VOLTS
V CC
I CC
V CC
i OUT
V IN+
V IN-
SINGLE-ENDED SIGNAL
100mV P-P MIN
1100mV P-P MAX
MAX3996
R OUT
R OUT
OUT-
FERRITE
BEAD*
V ID = V IN+ - V IN-
DIFFERENTIAL SIGNAL
200mV P-P MIN
2200mV P-P MAX
V ID
0.01 μ F
IN+
R IN
OUT+
0.01 μ F
i MOD
0.01 μ F
CURRENT
i MOD
0.01 μ F
IN-
25 ?
25 ?
TIME
MODULATION CURRENT
GENERATOR
Figure 2. Required Input Signal and Modulation-Current Polarity
TC
*MURATA
BLM11HA102SG
MODSET
R MOD
Bias Generator
Figure 4 shows the bias generator circuitry that con-
tains a power-control amplifier, smooth-start circuitry,
and two bias-fault sensors. The power-control amplifier
Figure 1. Output Load for AC Specification
Detailed Description
The MAX3996 contains a bias generator with automatic
power control and smooth start, a laser modulator, a
power-on reset (POR) circuit, and safety circuitry
(Figure 3).
combined with an internal NPN transistor provides DC
laser current to bias the laser in a light-emitting state.
The APC circuitry adjusts the laser bias current to main-
tain average power over temperature and changing
laser properties. The smooth-start circuitry prevents
current spikes to the laser during power-up or enable,
ensuring compliance with safety requirements and
extending the life of the laser.
V CC
FAULT
SHDNDRV
SMOOTH START
400mV
BIAS
BIAS
BIAS
1.1V
FAULT 1
PORDLY
TX_DISABLE
POR CIRCUIT
SAFETY
CIRCUITRY
BIAS
GENERATOR
MD
COMP
MD
MAX3996
BIAS ENABLE
WITH SMOOTH
START
V CC
MON1
MON2
POWER-CONTROL
AMPLIFIER
MAX3996 DISABLE
BIAS
BIAS
FAULT 2
400mV
R MON (11 ? )
MON2
MON1
50 ?
50 ?
OUT-
COMP
IN+
INPUT BUFFER
LASER
MODULATION
OUT+
Figure 4. Bias Circuitry
IN-
100 ?
MODULATION
The MD input is connected to the anode of a monitor
diode, which is used to sense laser power. The BIAS
output is connected to the cathode of the laser through
ENABLE
MODULATION
FAULT
MODULATION CURRENT
GENERATOR
an inductor or ferrite bead. The power-control amplifier
drives a transistor to control the laser ’ s bias current. In
a fault condition (Table 1), the base of the bias-driving
TC
MODSET
transistor is pulled low to ensure that bias current is
turned off.
Figure 3. Laser Driver Functional Diagram
_______________________________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3996CTP+ | 功能描述:激光驱动器 3-5.5V 2.5Gbps VCSEL & Laser Driver 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 |
| MAX3996CTP+D | 制造商:Maxim Integrated Products 功能描述:LASER DRVR VCSEL 2.5GBPS 1CH 20TQFN - Rail/Tube |
| MAX3996CTP+T | 功能描述:激光驱动器 3-5.5V 2.5Gbps VCSEL & Laser Driver 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 |
| MAX3996CTP+TD | 制造商:Maxim Integrated Products 功能描述:LASER DRVR VCSEL 2.5GBPS 1CH 20TQFN - Tape and Reel |
| MAX3996EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3996 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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