参数资料
| 型号： | MAX3296CTI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/28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
force a shutdown if a fault is detected. The shutdown
condition is latched until reset by a toggle of EN, EN , or
power.
Another safety system, open fiber control (OFC), uses
safety interlocks to prevent eye hazards. To accommo-
date the OFC standard, the MAX3286/MAX3296 series
provide dual enable inputs and dual fault outputs.
The safety circuitry contains fault detection, dual enable
inputs, latched fault outputs, and a pulse generator
(Figure 6).
Safety circuitry monitors the APC circuit to detect unsafe
levels of laser emission during single-point failures. A
single-point failure can be a short to V CC or GND or a
short between any two IC pins.
Pulse Generator
During startup, the laser does not emit light and the
APC loop is not closed, triggering a fault signal. To
allow startup, an internal fault-delay pulse disables the
safety system for a programmable period of time, allowing
the driver to begin operation. The length of the pulse is
determined by the capacitor connected at FLTDLY and
should be set 5 to 10 times longer than the APC time
constant. The internal safety features can be disabled
by connecting FLTDLY to GND. Note that EN must be
high, EN must be low, and V CC must be in the opera-
tional range for laser operation.
Fault Detection
The MAX3286/MAX3296 series has extensive and com-
prehensive fault-detection features. All critical nodes
are monitored for safety faults, and any node voltage
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
R TC ≥ 1.9k ?
R MOD = OPEN
TEMPCO = 4000ppm/ ° C
R TC = OPEN
TEMPCO = 50ppm/ ° C
0 10 20 30 40 50 60 70 80 90 100 110
that differs significantly from its expected value results
in a fault (Table 1). When a fault condition is detected,
the laser is shut down. See the Applications Information
section for more information on laser safety.
Shutdown
The laser drivers offer dual redundant bias shutdown
mechanisms. The SHDNDRV output drives an optional
external MOSFET semiconductor. The bias and modu-
lation drivers have separate internal disable signals.
Latched Fault Output
Two complementary FAULT outputs are provided with
the MAX3286/MAX3296 series. In the event of a fault,
JUNCTION TEMPERATURE ( ° C)
Figure 5. Modulation Current vs. Temperature for Maximum
and Minimum Temperature Coefficient
these outputs latch until one of three events occurs:
1) The power is switched off, then on.
EN
(FROM POR CIRCUIT)
PULSE GENERATOR
FLTDLY
t FLTDLY
R
Q
FAULT
RESET
DOMINANT
FAULT
DETECTION
FAULT
LATCH
V CC
REF_FAULT
MONITOR_FAULT
MD_FAULT
S
FAULT
POLARITY_FAULT
TC_FAULT
MOD_FAULT
EN
SHDNDRV
Figure 6. Simplified Safety Circuit Schematic
ENABLE
MAX3286
MAX3296
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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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