参数资料
| 型号： | MAX3296CTI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 2.5GBPS 5.5V 28TQFN |
| 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： | 30mA |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
The relationship between laser bias current and R MON
is shown in Figure 11. The remaining discrete compo-
nents used with the common cathode without photodi-
ode configuration are as follows:
Q1 = general-purpose PNP, β >100, f t > 5MHz
B1 = ferrite bead (see the Bias Filter section)
M1 = general-purpose PMOS device (optional)
C BIASDRV = 0.1μF (typ)
Common Anode with Photodiode
In the common-anode configuration with photodiode, a
servo control loop is formed by an external NPN transis-
tor (Q1), the laser diode, the monitor diode, R SET , and
the power-control amplifier. The voltage at MD is stabi-
lized to 1.7V. The monitor photodiode current is set by
I D = V MD / R SET (Figure 12). Determine the desired mon-
itor current (I D ), then select R SET = 1.7V / I D .
100
R SET = 1k ?
R MD = 5k ?
10
C BIASDRV and a degeneration resistor (R DEG ) must be
connected to the bias transistor (in this case NPN) to
obtain the desired APC loop time constant. This
improves power-supply (and ground) noise rejection. A
capacitance of 0.1μF is sufficient to obtain time con-
stants of up to 5μs in most cases. The voltage across
R DEG should not be larger than 250mV at maximum bias
current.
The discrete components used with the common anode
with photodiode configuration are summarized as follows:
R SET = 1.7 / I D
C BIASDRV = 0.1μF (typ)
R DEG = 0.25 / I BIAS(MAX)
Q1 = general-purpose NPN, β > 100, f t > 5MHz
B1 = ferrite bead (see the Bias Filter section)
M1 = general-purpose PMOS (optional)
Programming POR Delay
A capacitor can be added to PORDLY to increase the
delay for which POR is asserted low (meaning that V CC
is within the operational range) when powering up the
part.
The delay is approximately:
1
t =
C PORDLY
( 1 . 4 ) 10 ? 6
[ s ]
See the Typical Operating Characteristics.
0.1
10
100
1k
10k
R MON ( ? )
Figure 11. Common Cathode without Photodiode Laser
V CC
MAX3286
MAX3289
V CC
MAX3296
MAX3299
V CC
MONITOR
DIODE
V CC
MAX3286/96
POL ONLY
POL
SMOOTH-
START
1.7V
MON
SHDNDRV
BIASDRV
LASER
FERRITE
BEAD
B1
Q1
MD
POWER-CONTROL
AMPLIFIER
C BIASDRV
R SET
I D
I BIAS
R DEG
Figure 12. Common Anode with Photodiode
______________________________________________________________________________________
15
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相关代理商/技术参数 |
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| MAX3296EVKIT-LW | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX3296EVKIT-SW | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX3297CUE | 功能描述:激光驱动器 Integrated Circuits (ICs) 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 |
| MAX3297CUE+ | 功能描述:激光驱动器 Integrated Circuits (ICs) 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 |
| MAX3297CUE+T | 功能描述:激光驱动器 Integrated Circuits (ICs) 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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