- 您现在的位置：买卖IC网 > PDF目录20064 > MAX3996CTP+ (Maxim Integrated)IC LASR DRVR 2.5GBPS 5.5V 20TQFN PDF资料下载
参数资料
| 型号： | MAX3996CTP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 2.5GBPS 5.5V 20TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 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： | 40mA |
| 电流 - 偏置： | 60mA |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
Table 1. Typical Fault Conditions
PIN
FAULT CONDITION
V CC
MON2
BIAS
V MON2 > 400mV
V BIAS < 400mV
MAX3996
50 ?
50 ?
OUT+
TC, MODSET
V MODSET or V TC < 200mV
IN+
INPUT BUFFER
CURRENT
SWITCH
OUT-
Smooth-Start
During startup, the laser does not emit light, and the
APC loop is not closed. The smooth-start circuit pulls
IN-
100 ?
the MD pin to approximately 2.5V during the POR delay
and while TX_DISABLE is high. This causes the power-
control amplifier to shut off the bias transistor. When
POR delay is over and TX_DISABLE is low, the MD pin
is released and pulled to GND by R SET because there
is no laser power and thus no monitor diode current.
The output voltage of the power-control amplifier then
begins to increase. A capacitor attached to COMP
(C COMP ) slows the slew rate and allows a controlled
increase in bias current (Figure 11). Maxim recom-
mends C COMP = 0.1μF.
ENABLE
Σ
1.2V REFERENCE
4000ppm/ ° C
CURRENT AMPLIFIER
96X
MODULATION
CURRENT
GENERATOR
1.2V REFERENCE
0ppm/ ° C
Modulation Circuitry
The modulation circuitry consists of an input buffer, a
current mirror, and a high-speed current switch (Figure
5). The modulator drives up to 30mA of modulation cur-
rent into a 25 ? load.
TC
R TC
200mV
TC FAULT
MODSET
R MOD
200mV
MODSET
FAULT
Many of the modulator performance specifications
depend on total modulator current. To ensure good driver
performance, the voltage at either OUT+ or OUT- must
not be less than V CC - 1V.
Figure 5. Modulation Circuitry
The amplitude of the modulation current is set with resis-
tors at the MODSET and temperature coefficient (TC)
pins. The resistor at MODSET (R MOD ) programs the
temperature-stable portion of the modulation current,
and the resistor at TC (R TC ) programs the temperature-
increasing portion of the modulation current. Figure 6
shows modulation current as a function of temperature
for two extremes: R TC is open (the modulation current
has zero temperature coefficient), and R MOD is open
(the modulation temperature coefficient is 4000ppm/ ° C).
Intermediate temperature coefficient values of the mod-
ulation current can be obtained as described in the
Design Procedure section. Table 2 is the R TC and R MOD
selection table.
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
JUNCTION TEMPERATURE ( ° C)
Safety Circuitry
The safety circuitry contains a disable input, a fault
latch, and fault detectors (Figure 7). This circuitry moni-
tors the operation of the laser driver and forces a shut-
down if a single-point fault is detected. A single-point
fault can be a short to V CC or GND, or between any two
Figure 6. Modulation Current vs. Temperature for Maximum
and Minimum Temperature Coefficient
8
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| VI-26B-EV-F3 | CONVERTER MOD DC/DC 95V 150W |
| T95R107K010LSSL | CAP TANT 100UF 10V 10% 2824 |
| VI-263-EV-F3 | CONVERTER MOD DC/DC 24V 150W |
| VE-25N-CX | CONVERTER MOD DC/DC 18.5V 75W |
| RJZ-1512S/HP | CONV DC/DC 2W 15VIN 12VOUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3996CTP+ | 功能描述:激光驱动器 3-5.5V 2.5Gbps VCSEL & Laser Driver 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 |
| MAX3996CTP+D | 制造商:Maxim Integrated Products 功能描述:LASER DRVR VCSEL 2.5GBPS 1CH 20TQFN - Rail/Tube |
| MAX3996CTP+T | 功能描述:激光驱动器 3-5.5V 2.5Gbps VCSEL & Laser Driver 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 |
| MAX3996CTP+TD | 制造商:Maxim Integrated Products 功能描述:LASER DRVR VCSEL 2.5GBPS 1CH 20TQFN - Tape and Reel |
| MAX3996EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3996 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 |
发布紧急采购，3分钟左右您将得到回复。