参数资料
| 型号： | MAX3296CTI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/28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
1000
500ppm
1000ppm
2000ppm
2500ppm
with photodiode. The POL and POL inputs determine
the laser pinning (common cathode, common anode)
and affect the smooth-start circuits (Table 4).
1500ppm
3000ppm
3500ppm
Common Cathode with Photodiode
(Optical Feedback)
10
5mA
10mA
15mA
20mA
In the common cathode with photodiode configuration,
a servo control loop is formed by external PNP Q1, the
laser diode, the monitor diode, R SET , and the power-
control amplifier (Figure 9). The voltage at MD is stabi-
1
1
R L = 25 ?
10
25mA
30mA
100
1000
lized to 1.7V. The monitor photodiode current (I D ) is set
by (V REF - V MD ) / R SET = 0.95 / R SET . Determine the
desired monitor current (I D ), then select R SET = 0.95 / I D .
R MOD (k ? )
Figure 8a. R TC vs. R MOD for Various Conditions
40
35
30
The APC loop is compensated by C BIASDRV . A capacitor
must be placed from BIASDRV to V CC to ensure low-
noise operation and to reject power-supply noise. The
time constant governs how quickly the laser bias current
reacts to a change in the average total laser current
(I BIASDRV + I MOD ). A capacitance of 0.1μF is sufficient
to obtain a loop time constant in excess of 1μs, provid-
ed that R DEG is chosen appropriately. Resistor R DEG
might be necessary to ensure the APC loop’s stability
25
20
15
10
5
10 ?
LOAD NOTE: R TC = OPEN
25 ?
LOAD
50 ?
LOAD
when low bias currents are desired.
The voltage across R DEG should not be larger than
250mV at maximum bias current.
The discrete components used with the common cath-
ode with photodiode configuration are:
R SET = 0.95 / I D
0
0
2
4
6 8
10
12
14
C BIASDRV = 0.1μF (typ)
R MOD (k ? )
R DEG = 0.25 / I BIAS(MAX)
Figure 8b. Laser-Modulation Current vs. R MOD
Table 4. POL Pin Setup for Each Laser Configuration Type
DEVICE
MAX3286/MAX3296
POL
VCC
POL
GND
DESCRIPTION
LASER PINNING
Common cathode with
MAX3287/MAX3297
MAX3286/MAX3296
—
VCC
—
GND
photodiode
Common cathode without
MAX3288/MAX3298
MAX3286/MAX3296
—
GND
—
VCC
photodiode
V CC
Common anode with
MAX3289/MAX3299
—
—
photodiode
MAX3286/MAX3296
MAX3286/MAX3296
VCC
GND
VCC
GND
Not allowed; fault occurs
Not allowed; fault occurs
—
—
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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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