Datasheet > MAX3736

MAX3736

更新时间： 2023-12-20 18:44:50

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
11页	309K
描述
3.2Gbps、低功耗、紧凑的SFP激光驱动器

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中文翻译

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数据手册

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MAX3736 数据手册

3.2Gbps, Low-Power, Compact,

SFP Laser Driver

MAX736

DIS

82pF

16kΩ

24kΩ

7.2kΩ

OUT+

OUT-

50Ω

IN+

IN-

BIAS

x85

BC_MON

1.2V

MAX3736

BIASSET

MODSET

Figure 4. Functional Diagram

Bias Current Monitor

Detailed Description

The MAX3736 features a bias current monitor

(BC_MON). This monitor is realized by mirroring a frac-

tion of the bias current and developing a voltage

across an external resistor connected to ground. For

example, connecting a 100Ω resistor to ground gives

the following relationship:

The MAX3736 laser driver consists of three operational

blocks: a bias current generator, a modulation current

generator, and a high-speed modulation path. The

laser-biasing block includes a monitor output for bias-

sensing purposes. Both the bias and modulation gener-

ating blocks are enabled and disabled by the DIS pin.

The high-speed modulation path provides a 100Ω

differential input resistance.

= (I

/ 73) x 100Ω. For compliance, the

BIAS

voltage on BC_MON must be kept below 1.39V.

BC_MON

Modulation Current Generator

The laser’s modulation amplitude can be controlled by

placing a resistor from MODSET to ground. To set the

Bias Current Generator

To maintain constant average optical power, the

MAX3736 is designed to interface to a laser controller

IC. The laser controller IC controls the MAX3736, and

maintains a constant laser power using an automatic

power-control (APC) circuit. A back-facet photodiode,

mounted in the laser package, is used to convert the

optical power into a photocurrent. The laser controller

IC adjusts the laser bias current so the monitor photodi-

ode’s current matches the level programmed by the

user. It does this by adjusting the current sourced by

the MAX3736’s BIASSET pin. The MAX3736 reacts by

increasing or decreasing the laser current at BIAS.

modulation amplitude, see the I

vs. R

MODSET

MOD

graph in the Typical Operating Characteristics. A more

advanced control scheme employs the use of a laser

controller IC to control modulation current to

stabilize the extinction ratio. For more information on

controlling the extinction ratio, refer to Application

Note 1092: HFAN-02.3.1: Maintaining Average Power

and Extinction Ratio, Part 1, Slope Efficiency and

Threshold Current.

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1...4 5 678 9 10 11

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与MAX3736相关器件

型号	品牌	获取价格	描述	数据表
MAX3736E/D	MAXIM	获取价格	3.2Gbps, Low-Power, Compact, SFP Laser Driver
MAX3736ETE	MAXIM	获取价格	3.2Gbps, Low-Power, Compact, SFP Laser Driver
MAX3736ETE+T	MAXIM	获取价格	Interface Circuit, BIPolar, 3 X 3 MM, TQFN-16
MAX3736ETE-T	MAXIM	获取价格	Interface Circuit, BIPolar, 3 X 3 MM, TQFN-16
MAX3737	MAXIM	获取价格	Multirate Laser Driver with Extinction Ratio Control
MAX3737_11	MAXIM	获取价格	Multirate Laser Driver with Extinction Ratio Control 100mA Bias Current
MAX3737EGJ	MAXIM	获取价格	Multirate Laser Driver with Extinction Ratio Control
MAX3737EGJ-T	MAXIM	获取价格	Interface Circuit, BIPolar, 5 X 5 MM, 0.90 MM HEIGHT, QFN-32
MAX3737ETJ	MAXIM	获取价格	Multirate Laser Driver with Extinction Ratio Control
MAX3737ETJ+	MAXIM	获取价格	Interface Circuit, BIPolar, 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE, TQFN-32

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