参数资料
| 型号： | MAX3296CTI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/28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
impedance). This ensures that the PNP or NPN transistor
is turned off, removing the laser-bias current. (See the
Applications Information section.)
POLARITY_FAULT
+1.53V
The REF pin provides a controlled reference voltage
dependent upon the voltage at MON. The voltage at REF
is V REF = 2.65 - 2.25(V CC - V MON ). A resistor connected
at REF determines the laser power when APC is used
with common-cathode lasers. See the Design Procedure
section for information about setting the laser power.
Modulation Circuitry
The modulator circuitry consists of an input buffer, current
POL
POL
MD
SMOOTH-
START
ENABLE
GLITCH
REJECT
+1.97V
POWER-
CONTROL
AMPLIFIER
+1.7V
WINDOW
COMPARATOR
ENABLE
MD
FAULT
BIASDRV
generator, and high-speed current switch (Figure 4). The
modulator drives up to 30mA of modulation current into
a 25 ? load.
REF
CONTROLLED REFERENCE VOLTAGE
V REF = 2.65 - 2.25 (V CC - V MON )
MON
Many of the modulator performance specifications
depend on the total modulator current (I OUT ) (Figure 1a).
To ensure good driver performance, the voltage at
2.95V
REF_FAULT
MONITOR_FAULT
V CC - 540mV
OUT+ and OUT- must not be less than V CC - 1V.
The amplitude of the modulation current is set with
resistors at the MODSET and temperature coefficient (TC)
pins. The resistor at MODSET (R MOD ) programs the
temperature-stable portion of modulation current, while
the resistor at TC (R TC ) programs the temperature-
Figure 3. Bias Generator Circuitry
V CC
increasing portion of the modulation current. Figure 5
shows modulation current as a function of temperature
for two extremes: R TC is open (the modulation current
IN+
MAX3286
MAX3296
50 ?
50 ?
OUT+
has zero temperature coefficient) and R MOD is open
(the modulation temperature coefficient is 4000ppm).
Intermediate tempco values of modulation current can
400 ?
INPUT
BUFFER
CURRENT
SWITCH
OUT-
be obtained as described in the Design Procedure sec-
tion. Table 3 is the R TC and R MOD selection table.
V CC - 0.3V
400 ?
Safety Circuitry
The laser driver can be used with two popular safety
systems. APC maintains laser safety using local feed-
back. Safety features monitor laser driver operation and
IN-
MODULATION CURRENT
GENERATOR
4000ppm/ ° C
ENABLE
CURRENT AMPLIFIER
1.2V
Table 3. R TC and R MOD Selection Table
REFERENCE
REFERENCE
TEMPCO
(ppm/°C)
I MOD = 30mA
R MOD R TC
(k ? ) (k ? )
I MOD = 15mA
R MOD R TC
(k ? ) (k ? )
I MOD = 5mA
R MOD R TC
(k ? ) (k ? )
TC_FAULT
MOD_FAULT
3500
3000
2500
2000
1500
1000
26.7
9.53
5.76
4.12
3.24
2.67
1.69
2.0
2.49
3.16
4.32
6.49
53.6
18.7
11.3
8.06
6.19
5.11
3.65
4.32
5.23
6.49
8.87
13.3
162
57.6
34.8
24.9
19.1
15.8
11.5
13.3
16.2
20.0
26.7
40.2
TC
R TC
0.8V
MODSET
R MOD
0.8V
500
2.26
13.3
4.22
26.7
13.3
80.6
Figure 4. Laser Modulator Circuitry
10
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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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