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參數(shù)資料
| 型號(hào)： | 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(dòng)器 |
| 文件頁(yè)數(shù)： | 12/17頁(yè) |
| 文件大?。?/td> | 785K |
| 代理商： | MAX3996 |
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M
monitor photodiode current is set by I
D
= V
MD
/R
SET
.
Determine the desired monitor current (I
D
), and then
select R
SET
= 1.1V/I
D
.
A bias stabilizing capacitor (C
COMP
) must be connect-
ed between the COMP pin and ground to obtain the
desired APC loop time constant. This improves power-
supply and ground noise rejection. A capacitance of
0.1μF usually is sufficient to obtain time constants of up
to 35μs.
The degeneration resistance between MON2 and
ground determines the bias current that causes a fault
and affects the APC time constant. Select R
MON
(the
total resistance between MON2 and ground) =
400mV/(maximum bias current). A degeneration resis-
tance of 10
can be obtained by grounding MON1.
Increasing R
MON
increases the APC time constant.
The discrete components for use with the common
anode with photodiode configuration are:
R
SET
= 1.1V/I
D
C
COMP
= 0.1μF (typ)
L1 = ferrite bead, see the
Bias Filter
section
R
MON
= 400mV/(maximum bias current)
Programming POR Delay
A capacitor can be added to PORDLY to increase the
delay when powering up the part. The delay will be
approximately:
See the
Typical Operating Characteristics
section.
Designing the Laser-Compensation
Filter Network
Laser package inductance causes the laser impedance
to increase at high frequencies, leading to ringing,
overshoot, and degradation of the laser output. A laser-
compensation filter network can be used to reduce the
laser impedance at high frequencies, thereby reducing
output ringing and overshoot.
t
C
1 4 10
6
.
onds
PORDLY
=
sec
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
12
______________________________________________________________________________________
MAX3996
V
CC
I
D
R
SET
MONITOR
DIODE
1.1V
POWER-CONTROL
AMPLIFIER
V
CC
SHUTDOWN
CIRCUIT
OPTIONAL
SHUTDOWN
CIRCUITRY
SHDNDRV
LASER
L1*
11
SMOOTH
START
BIAS
DISABLE
MD
BIAS
MON2
MON1
I
BIAS
COMP
C
COMP
0.1
μ
F
*FERRITE BEAD
Figure 11. APC Loop
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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(dòng)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(dòng)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(dòng)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(dòng)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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