参数资料
型号: MAX3296CTI+T
厂商: Maxim Integrated
文件页数: 9/28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
3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
L V
PORDLY
E N
E N
FLTDLY
POL
POL
MON
MD
IN+
I N-
POR CIRCUIT
SAFETY
BIAS GENERATOR
LASER
MODULATOR
MODSET
TC
POR
FAULT
FAULT
SHDNDRV
MD
BIASDRV
REF
OUT+
OUT-
the anode or cathode of a monitor photodiode or to a
resistor-divider, depending on the specific application
circuit. Three application circuits are supported:
common-cathode laser with photodiode, common-
cathode laser without photodiode, and common-anode
laser with photodiode (as shown in the Design Procedure
section). The POL and POL inputs determine the laser
pinning (common cathode, common anode) (Table 4).
The smooth-start circuitry prevents current spikes to the
laser during power-up or enable; this ensures compliance
with safety requirements and extends the life of the laser.
The power-control amplifier drives an external transistor
to control the laser bias current. In a fault condition, the
power-control amplifier ’s output is disabled (high
Figure 2a. Simplified Laser Driver Functional Diagram
LV
PORDLY
REF
POR
FAULT
POR CIRCUIT
MAX3286
MAX3296
1.7V
REF
CONTROLLED
REFERENCE
GENERATOR
FAULT
V CC - 0.54V
MON
SHDNDRV
FLTDLY
EN
EN
SAFETY
CIRCUITRY
1.97V
1.53V
MD
POL
POL
SMOOTH-
START
+1.7V
BIAS GENERATOR
BIASDRV
IN+
IN-
INPUT BUFFER
LASER
MODULATOR
MODULATION CURRENT
GENERATOR
50 ?
V CC
50 ?
OUT-
OUT+
TC
R TC
Figure 2b. Laser Driver Functional Diagram
MODSET
R MOD
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9
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