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參數(shù)資料
| 型號： | MAX3996 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.0V to 5.5V, 2.5Gbps VCSEL and Laser Driver |
| 中文描述： | +3.0V至+5.5V、2.5Gbps VCSEL及激光驅(qū)動器 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大?。?/td> | 785K |
| 代理商： | MAX3996 |
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
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.
M
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
_______________________________________________________________________________________
9
Table 2. R
TC
and R
MOD
Selection Table
PIN NAME
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.
If the shutdown circuitry is used, bias current is shut off.
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.
TC
FAULT
TX_DISABLE
PORDLY
IN+, IN-
MON1
MON2
COMP
Disables bias current.
MD
Disables bias current.
The APC circuit responds by increasing bias current
until a fault is detected at the emitter or collector of the
bias transistor, and then a fault* state occurs.
SHDNDRV
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.
*
A fault state asserts the FAULT pin, disables the modulator outputs, disables the bias output, and asserts the SHDNDRV pin.
Does not affect laser power.
BIAS
Fault state* occurs. If the shutdown circuitry is used,
bias current is shut off.
Does not affect laser power.
Fault state* occurs.
OUT+, OUT-
MODSET
Table 3. Circuit Responses to Various Single-Point Faults
i
MOD
= 30mA
i
MOD
= 15mA
i
MOD
= 5mA
TEMPCO
(ppm/°C)
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
3500
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2000
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1000
500
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3996CGP | 功能描述:激光驅(qū)動器 3-5.5V 2.5Gbps VCSEL & Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3996CGP-T | 功能描述:激光驅(qū)動器 3-5.5V 2.5Gbps VCSEL & Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
| MAX3996CTP+ | 功能描述:激光驅(qū)動器 3-5.5V 2.5Gbps VCSEL & Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝: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:激光驅(qū)動器 3-5.5V 2.5Gbps VCSEL & Laser Driver RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube |
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