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)： 11/17頁(yè)
文件大?。?/td> 785K
代理商： MAX3996
Determine Modulator Configuration
The MAX3996 can be used in several configurations.
For modulation currents less than 20mA, Maxim recom-
mends the configuration shown in the
Typical
Application Circuit
. Outputs greater than 20mA could
cause the voltage at the modulator output to be less
than V
CC
- 1V, which might degrade laser output. For
large currents, Maxim recommends the configuration in
Figure 9. A differential configuration is in Figure 10.
Designing the Bias Filter and
Output Pullup Beads
To reduce deterministic jitter, add a ferrite bead induc-
tor (L1) between the BIAS pin and the cathode of the
laser. Select L1 to have an impedance >100
between
f = 10MHz and f = 2GHz, and a DC resistance < 3
;
Maxim recommends the Murata BLM11HA102SG.
These inductors are also desirable for connecting the
OUT+ and OUT- pins to V
CC
.
Programming Laser Power and
Bias Fault Threshold
The IC is designed to drive a common anode laser with
a photodiode. A servo-control loop is formed by the
internal NPN bias-driving transistor, the laser diode, the
monitor diode (R
SET
), and the power-control amplifier
(Figure 11). The voltage at MD is stabilized to 1.1V. The
M
3.0V to 5.5V, 2.5Gbps VCSEL
and Laser Driver
______________________________________________________________________________________
11
1000
1
1
100
1000
10
R
MOD
(k
)
R
T
)
10
500ppm
1000ppm
1500ppm
2000ppm
3000ppm
2500ppm
3500ppm
5mA
10mA
25mA
30mA
20mA
15mA
R
L
= 25
Figure 8. R
TC
vs. R
MOD
for Various Conditions
MAX3996
0.01
μ
F
0.01
μ
F
C
PORDLY
R
TC
R
MOD
C
COMP
N.C.
0.01
μ
F
0.01
μ
F
L1*
25
OPTIONAL SHUTDOWN
CIRCUITRY
1.8k
V
CC
V
CC
V
CC
TX_DISABLE
FAULT
IN+
IN-
PORDLY
TC
MODSET MON1 MON2COMP GND
MD
BIAS
OUT+
OUT-
SHDNDRV
*FERRITE BEAD
R
SET
V
CC
L2*
V
CC
L3*
0.01
μ
F
Figure 9. Large Modulation Current
MAX3996
0.01
μ
F
0.01
μ
F
C
PORDLY
R
TC
R
MOD
C
COMP
N.C.
0.01
μ
F
0.01
μ
F
L1*
V
CC
V
CC
V
CC
TX_DISABLE
FAULT
IN+
IN-
PORDLY
TC MODSET MON1 MON2 COMP GND
MD
BIAS
OUT-
OUT+
SHDNDRV
*FERRITE BEAD
R
SET
L2*
Figure 10. Differential Configuration
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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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