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參數(shù)資料
| 型號： | MAX3273 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 32-Bit Digital Signal Controller with Flash 100-LQFP -40 to 125 |
| 中文描述： | +3.3V、2.5Gbps低功耗激光驅動器 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大小： | 984K |
| 代理商： | MAX3273 |
M
+3.3V, 2.5Gbps Low-Power Laser Driver
8
_______________________________________________________________________________________
Detailed Description
The MAX3273 laser driver consists of two main parts: a
high-speed modulation driver and a laser-biasing block
with automatic power control (APC). The circuit design
is optimized for both high-speed and low-voltage
(+3.3V) operation. To minimize the jitter of the input sig-
nal at speeds as high as 2.7Gbps, the device accepts
a differential CML clock signal for data retiming. When
LATCH is high, the input data is synchronized by the
clock signal. When LATCH is low, the input data is
directly applied to the output stage.
The output stage is composed of a high-speed differ-
ential pair and a programmable modulation current
source. Because the modulation output drives a maxi-
mum current of 60mA into the laser with an edge speed
of 59ps, large transient voltage spikes can be generat-
ed (due to the parasitic inductance of the laser). These
transients and the laser-forward voltage leave insuffi-
cient headroom for the proper operation of the laser dri-
ver if the modulation output is DC-coupled to the laser
diode. To solve this problem, the MAX3273
’
s modula-
tion output is AC-coupled to the cathode of a laser
diode. An external pullup inductor is necessary to DC-
bias the modulation output at V
CC
. Such a configuration
isolates laser-forward voltage from the output circuitry
and the supply voltage V
CC
. A simplified functional dia-
gram is shown in Figure 3.
The MAX3273 modulation output is optimized for dri-
ving a 25
load. Modulation current swings of 75mA
are possible, but because of minimum power-supply
and jitter requirements at 2.5Gbps, the specified maxi-
mum modulation current is limited to 60mA. To inter-
face with the laser diode, a damping resistor (R
D
) is
required for impedance matching. An RC-shunt net-
work might also be necessary to compensate for the
laser-diode parasitic inductance, thereby improving the
L
P2
L
P1
0
1
MUX
Q
D
x160
FAILURE
DETECTOR
TIA
L
P1
LATCH
DATA
CLK
EN
V
BG
I
APCSET
MODSET
R
MODSET
BIASMAX
R
BIASMAX
APCFILT1
APCFILT2
APCSET
R
APCSET
C
APCFILT
x190
V
CC
FAIL
MD
I
MD
500pF
V
CC
BIAS
I
BIAS
OUT+
OUT-
25
C
D
R
D
I
MOD
V
CC
V
CC
MAX3273
Figure 3. Functional Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| MAX3273EGG | +3.3V, 2.5Gbps Low-Power Laser Driver |
| MAX3274UGE | Dual-Rate Fibre Channel Limiting Amplifier |
| MAX3274 | 32-Bit Digital Signal Controller with Flash 100-BGA MICROSTAR -40 to 85 |
| MAX327CPE | Quad, SPST, Ultra-Low Leakage, CMOS Analog Switches |
| MAX327CSE | Quad, SPST, Ultra-Low Leakage, CMOS Analog Switches |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3273E/D | 功能描述:激光驅動器 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 |
| MAX3273EGG | 功能描述:激光驅動器 2.5Gbps Low-Power 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 |
| MAX3273EGG-T | 功能描述:激光驅動器 2.5Gbps Low-Power 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 |
| MAX3273ETG+ | 功能描述:激光驅動器 2.5Gbps Low-Power 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 |
| MAX3273ETG+T | 功能描述:激光驅動器 2.5Gbps Low-Power 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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