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參數(shù)資料
| 型號： | MAX3286 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers |
| 中文描述： | 3.0V至5.5V、1.25Gbps/2.5Gbps LAN激光驅(qū)動器 |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 1446K |
| 代理商： | MAX3286 |
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15
M
3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
V
CC
V
CC
MAX3286/96
ONLY
POL
SHDNDRV
C
BIASDRV
BIASDRV
MON
LASER
Q1
MD
POWER-CONTROL
AMPLIFIER
I
BIAS
I
D
FERRITE
BEAD
B1
MONITOR
DIODE
1.7V
SMOOTH-
START
V
CC
V
CC
R
DEG
R
SET
POL
MAX3286
MAX3289
MAX3296
MAX3299
Figure 12. Common Anode with Photodiode
The relationship between laser bias current and R
MON
is shown in Figure 11. The remaining discrete compo-
nents used with the common cathode without photodi-
ode configuration are as follows:
Q1 = general-purpose PNP,
β
>100, f
t
> 5MHz
B1 = ferrite bead (see the
Bias Filter
section)
M1 = general-purpose PMOS device (optional)
C
BIASDRV
= 0.1μF (typ)
Common Anode with Photodiode
In the common-anode configuration with photodiode, a
servo control loop is formed by an external NPN transis-
tor (Q1), the laser diode, the monitor diode, R
SET
, and
the power-control amplifier. The voltage at MD is stabi-
lized to 1.7V. The monitor photodiode current is set by
I
D
= V
MD
/ R
SET
(Figure 12). Determine the desired mon-
itor current (I
D
), then select R
SET
= 1.7V / I
D
.
C
BIASDRV
and a degeneration resistor (R
DEG
) must be
connected to the bias transistor (in this case NPN) to
obtain the desired APC loop time constant. This
improves power-supply (and ground) noise rejection. A
capacitance of 0.1μF is sufficient to obtain time con-
stants of up to 5μs in most cases. The voltage across
R
DEG
should not be larger than 250mV at maximum bias
current.
The discrete components used with the common anode
with photodiode configuration are summarized as follows:
R
SET
= 1.7 / I
D
C
BIASDRV
= 0.1μF (typ)
R
DEG
= 0.25 / I
BIAS(MAX)
Q1 = general-purpose NPN,
β
> 100, f
t
> 5MHz
B1 = ferrite bead (see the
Bias Filter
section)
M1 = general-purpose PMOS (optional)
Programming POR Delay
A capacitor can be added to PORDLY to increase the
delay for which POR is asserted low (meaning that V
CC
is within the operational range) when powering up the
part.
The delay is approximately:
See the
Typical Operating Characteristics.
t
C
(
PORDLY
.
=
[ ]
1 4 10
6
100
0.1
10
1k
10k
1
10
R
MON
(
)
L
100
R
SET
= 1k
R
MD
= 5k
Figure 11. Common Cathode without Photodiode Laser
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3296 | MAX3296 Shortwave or VCSEL (Common Cathode) Evaluation Kit |
| MAX3296CGISEVKIT | MAX3296 Shortwave or VCSEL (Common Cathode) Evaluation Kit |
| MAX3296EVKIT-SW | MAX3296 Shortwave or VCSEL (Common Cathode) Evaluation Kit |
| MAX3297CUE | 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers |
| MAX3286-MAX3299 | 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3286C/D | 功能描述:激光驅(qū)動器 DICE SALES DICE 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 |
| MAX3286C/D-B1H WAF | 制造商:Maxim Integrated Products 功能描述: |
| MAX3286CGI | 功能描述:激光驅(qū)動器 NULL 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 |
| MAX3286CGI-T | 功能描述:激光驅(qū)動器 NULL 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 |
| MAX3286CHJ | 功能描述:激光驅(qū)動器 3.0V to 5.5V 1.25Gbps/2.5Gbps LAN 激光驅(qū)動器 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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