参数资料
| 型号： | MAX3996CTP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/16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： | 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： | 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： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
Table 2. R TC and R MOD Selection Table
TEMPCO
i MOD = 30mA
i MOD = 15mA
i MOD = 5mA
(ppm/°C)
3500
3000
2500
2000
1500
1000
500
R MOD (k ? )
17.1
8.04
5.20
3.81
2.98
2.44
2.05
R TC (k ? )
1.85
2.19
2.68
3.42
4.64
7.08
14.4
R MOD (k ? )
34.4
16.3
10.6
7.86
6.21
5.12
4.34
R TC (k ? )
3.94
4.64
5.62
7.08
9.53
14.4
29.1
R MOD (k ? )
104
49.5
32.4
24.1
19.1
15.9
13.5
R TC (k ? )
12.3
14.4
17.4
21.8
29.1
43.8
87.8
Table 3. Circuit Responses to Various Single-Point Faults
PIN NAME
TC
FAULT
TX_DISABLE
PORDLY
IN+, IN-
MON1
MON2
COMP
CIRCUIT RESPONSE TO OVERVOLTAGE OR
SHORT TO V CC
Does not affect laser power.
Does not affect laser power.
Modulation and bias current are disabled.
Does not affect laser power.
Does not affect laser power.
Fault state* occurs.
Fault state* occurs.
A fault is detected at either the collector or the emitter
of the internal bias transistor, and a fault state* occurs.
CIRCUIT RESPONSE TO UNDERVOLTAGE OR
SHORT TO GROUND
Fault state* occurs.
Does not affect laser power.
Normal condition for circuit operation.
Modulation and bias current are disabled.
Does not affect laser power.
Does not affect laser power.
Does not affect laser power.
Disables bias current.
If the shutdown circuitry is used, bias current is shut off.
The APC circuit responds by increasing bias current
MD
SHDNDRV
BIAS
OUT+, OUT-
MODSET
Disables bias current.
Does not affect laser power. If the shutdown circuitry is
used, bias current is shut off.
In this condition, laser forward voltage is 0V and no
light is emitted.
Does not affect laser power.
Does not affect laser power. Fault* state may occur.
until a fault is detected at the emitter or collector of the
bias transistor, and then a fault* state occurs.
Does not affect laser power.
Fault state* occurs. If the shutdown circuitry is used,
bias current is shut off.
Does not affect laser power.
Fault state* occurs.
* A fault state asserts the FAULT pin, disables the modulator outputs, disables the bias output, and asserts the SHDNDRV pin.
IC pins. See Table 3 to view the circuit response to vari-
ous single-point failures. The shutdown condition is
latched until reset by a toggle of TX_DISABLE or V CC.
Fault Detection
All critical nodes are monitored for safety faults, and
any node voltage 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 for more information on laser
safety.
Shutdown
The laser driver offers redundant bias shutdown. The
SHDNDRV output drives an optional external transistor.
The bias and modulation drivers have separate internal
disable signals.
_______________________________________________________________________________________
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| 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 |
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