参数资料
| 型号： | MAX3273ETG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 2.7GBPS 3.6V 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 2.7Gbps |
| 通道数： | 1 |
| 电源电压： | 3.14 V ~ 3.6 V |
| 电流 - 电源： | 30mA |
| 电流 - 调制： | 60mA |
| 电流 - 偏置： | 100mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
+3.3V, 2.5Gbps Low-Power Laser Driver
LATCH
L P1
V CC
25 Ω
V CC
0
OUT-
DATA
D
Q
MUX
1
I MOD
OUT+
C D
R D
L P1
CLK
MAX3273
V CC
L P2
BIAS V CC
I BIAS
EN
V BG
x160
x190
TIA
FAILURE
DETECTOR
I APCSET
MD
FAIL
I MD
500pF
MODSET
R MODSET
BIASMAX
R BIASMAX
APCFILT1
APCFILT2
APCSET
R APCSET
C APCFILT
Figure 3. Functional Diagram
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 Ω 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
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3273EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3273 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3274UGE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3277EVKIT | 制造商:Maxim Integrated Products 功能描述:LOW-NOISE, FIBRE CHANNEL TRANSIMPED - Boxed Product (Development Kits) |
| MAX3277U/D | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX327C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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