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參數(shù)資料
| 型號(hào)： | MAX3287CUE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 其它接口 |
| 英文描述： | 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, DSO16 |
| 封裝： | TSSOP-16 |
| 文件頁(yè)數(shù)： | 14/28頁(yè) |
| 文件大?。?/td> | 1446K |
| 代理商： | MAX3287CUE |
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M
3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
Q1 = general-purpose PNP,
β
>100, f
t
> 5MHz
B1 = ferrite bead (see
Bias Filter
section)
M1 = general-purpose PMOS device (optional)
Common Cathode with Current Feedback
In the common-cathode configuration with current feed-
back, a servo control loop is formed by an external PNP
transistor (Q1), R
MON
, the controlled-reference voltage
block, R
SET
, R
MD
, and the power-control amplifier
(Figure 10). The voltage at MD is stabilized to 1.7V. The
voltage at MON is set by the resistors R
SET
and R
MD
.
As in the short-wavelength configuration, a 0.1μF
C
BIASDRV
connected between BIASDRV and V
CC
is
sufficient to obtain an approximate 1μs APC loop time
constant. This improves power-supply noise rejection.
To select the external components:
1) Determine the required laser bias current
I
BIAS
= I
TH
+ I
MOD / 2
2) Select R
MD
and R
SET
.
Maxim recommends R
SET
= 1k
, R
MD
= 5k
, which
results in V
CC
- V
MON
≈
250mV.
3) Select R
MON
where R
MON
= 250mV / I
BIAS
, assuming
R
SET
= 1k
and R
MD
= 5k
.
V
CC
V
CC
R
DEG
V
CC
CONTROLLED REFERENCE VOLTAGE
V
REF
= 2.65V
REF
ONLY
MAX3286/96
POL
SHDNDRV
C
BIASDRV
BIASDRV
MON
M1
Q1
MD
POWER-CONTROL
AMPLIFIER
LASER
I
BIAS
PHOTO
DIODE
I
D
FERRITE
BEAD
B1
1.7V
SMOOTH-
START
V
CC
R
SET
POL
MAX3286
MAX3287
MAX3296
MAX3297
Figure 9. Common-Cathode Laser with Photodiode
V
CC
R
MON
V
CC
CONTROLLED REFERENCE VOLTAGE
V
REF
= 2.65V - 2.25V (V
CC
- V
MON
)
REF
MAX3286/96
ONLY
POL
SHDNDRV
C
BIASDRV
BIASDRV
MON
M1
Q1
MD
POWER-CONTROL
AMPLIFIER
I
BIAS
I
D
FERRITE
BEAD
B1
1.7V
SMOOTH-
START
V
CC
R
SET
R
MD
POL
MAX3286
MAX3288
MAX3296
MAX3298
LASER
Figure 10. Common Cathode with Current Feedback (PNP Configuration)
14
______________________________________________________________________________________
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3286 | 3.0V to 5.5V, 1.25Gbps/2.5Gbps LAN Laser Drivers |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3287CUE-T | 功能描述:激光驅(qū)動(dòng)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 |
| MAX3288CUE | 功能描述:激光驅(qū)動(dòng)器 3.0V to 5.5V 1.25Gbps/2.5Gbps LAN 激光驅(qū)動(dòng)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 |
| MAX3288CUE-T | 功能描述:激光驅(qū)動(dòng)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 |
| MAX3289CUE | 功能描述:激光驅(qū)動(dòng)器 20Mbps +3.3V SOT23 RS-485/RS-422 Transmitters 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 |
| MAX3289CUE-T | 功能描述:激光驅(qū)動(dòng)器 20Mbps +3.3V SOT23 RS-485/RS-422 Transmitters 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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