参数资料
| 型号： | MAX3996CTP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 12/16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： | 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 ~ 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： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
SHDNDRV
SHUTDOWN
OPTIONAL
SHUTDOWN
CIRCUITRY
V CC
LASER
V CC
MONITOR
DIODE
SMOOTH
START
1.1V
MAX3996
CIRCUIT
L1*
BIAS
I BIAS
MD
POWER-CONTROL
AMPLIFIER
11 ?
MON2
R SET
*FERRITE BEAD
I D
BIAS
DISABLE
C COMP
0.1 μ F
COMP
MON1
Figure 11. APC Loop
monitor photodiode current is set by I D = V MD /R SET .
Determine the desired monitor current (I D ), and then
select R SET = 1.1V/I D .
A bias stabilizing capacitor (C COMP ) must be connect-
ed between the COMP pin and ground to obtain the
desired APC loop time constant. This improves power-
supply and ground noise rejection. A capacitance of
0.1μF usually is sufficient to obtain time constants of up
to 35μs.
The degeneration resistance between MON2 and
R SET = 1.1V/I D
C COMP = 0.1μF (typ)
L1 = ferrite bead, see the Bias Filter section
R MON = 400mV/(maximum bias current)
Programming POR Delay
A capacitor can be added to PORDLY to increase the
delay when powering up the part. The delay will be
approximately:
ground determines the bias current that causes a fault
and affects the APC time constant. Select R MON (the
total resistance between MON2 and ground) =
t =
C PORDLY
1 . 4 × 10 ? 6
sec onds
400mV/(maximum bias current). A degeneration resis-
tance of 10 ? can be obtained by grounding MON1.
Increasing R MON increases the APC time constant.
The discrete components for use with the common
anode with photodiode configuration are:
See the Typical Operating Characteristics section.
Designing the Laser-Compensation
Filter Network
Laser package inductance causes the laser impedance
to increase at high frequencies, leading to ringing,
overshoot, and degradation of the laser output. A laser-
compensation filter network can be used to reduce the
laser impedance at high frequencies, thereby reducing
output ringing and overshoot.
12
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| 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 |
| MAX3997ETM+ | 制造商:Maxim Integrated Products 功能描述:4 CH 10.3G LIMITING AND LINEAR EQ - Rail/Tube |
| MAX3997ETM+CCP | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX3997ETM+T | 制造商:Maxim Integrated Products 功能描述:4 CH 10.3G LIMITING AND LINEAR EQ - Tape and Reel |
| MAX3997EVKIT# | 制造商:Maxim Integrated Products 功能描述:EVALUATION KIT FOR THE MAX3997 - Boxed Product (Development Kits) |
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