Datasheet > MAX3863ETJ+T

MAX3863ETJ+T

更新时间： 2024-02-10 22:56:33

品牌	Logo	应用领域
美信 - MAXIM		接口集成电路
页数	文件大小	规格书
15页	400K
描述
Interface Circuit, BIPolar, ROHS COMPLIANT, TQFN-32

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MAX3863ETJ+T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	QFN
包装说明：	HVQCCN, LCC32,.2SQ,20	针数：	32
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.81
接口集成电路类型：	INTERFACE CIRCUIT	JESD-30 代码：	S-XQCC-N32
JESD-609代码：	e3	长度：	5 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	32	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装等效代码：	LCC32,.2SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	电源：	3.3 V
认证状态：	Not Qualified	座面最大高度：	0.8 mm
子类别：	Display Drivers	最大供电电压：	3.6 V
最小供电电压：	3.15 V	标称供电电压：	3.3 V
表面贴装：	YES	技术：	BIPOLAR
温度等级：	INDUSTRIAL	端子面层：	Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	5 mm	Base Number Matches：	1

MAX3863ETJ+T 数据手册

2.7Gbps Laser Driver with Modulation

Compensation

MAX863

A - TOKO FSLB2520-330K

B - MURATA BLM11HA601SPT

50Ω

DATA+

DATA-

DATA+

DATA-

25Ω

MODN

0.1μF

OSCILLOSCOPE

MAX3863

50Ω

MOD

0.1μF

APCFILT1

50Ω

CLK+

CLK-

CLK+

CLK-

50Ω

BIAS

RTEN

15Ω

Figure 1. AC Characterization

Mark-Density Outputs

Detailed Description

The MK+ and MK- outputs monitor the input signal

mark density. With a 50% mark density, both outputs

are the same voltage. More ones cause the MK+ volt-

age to increase and the MK- voltage to decrease.

Fewer ones than zeros cause MK- to be at a higher

voltage than MK+.

The MAX3863 laser driver has two main components: a

high-speed modulation driver and a biasing block with

APC. The clock and data inputs to the modulation driver

use CML logic levels. The optional clock signal synchro-

nizes data transitions for minimum pattern-dependent jit-

ter. Outputs to the laser diode consist of a switched

modulation current and a steady bias current. The APC

loop adjusts the laser diode bias current to maintain con-

stant average optical power. Compensation of the modu-

lation current can be programmed to keep a constant

extinction ratio over time and temperature. The modula-

tion output stage uses a programmable current source

with a maximum current of 80mA. A high-speed differen-

tial pair switches the source to the laser diode. The rise

and fall times are typically 50ps.

Pulse-Width Control

A pulse-width adjustment range of 50% to 150%

( 185ps) is available at 2.7Gbps. This feature compen-

sates pulse-width distortion elsewhere in the system.

Resistors at the PWC+ and PWC- pins program the

pulse width. The sum of the resistors is 1kΩ. The pins

can be left open for a 100% pulse width. A voltage also

can control these pins. A differential voltage of 600mV

(typ) gives 185ps of pulse-width distortion.

Optional Input Data Retiming

To eliminate pattern-dependent jitter in the input data, a

synchronous differential clock signal should be con-

nected to the CLK+ and CLK- inputs, and the RTEN

control input should be connected low. The input data

is retimed on the rising edge of CLK+. If RTEN is tied

high or is left floating, the retiming function is disabled,

and the input data is directly connected to the output

stage. Leave CLK+ and CLK- open when retiming is

disabled.

Output Enable

The MAX3863 incorporates an input to enable current

to the laser diode. When EN is low, the modulation and

bias outputs at the MOD pin are enabled. When EN is

high or floating, the output is disabled. In the disabled

condition, bias and modulation currents are off.

Power-Supply Threshold

To prevent data errors caused by low supply, the

MAX3863 disables the laser diode current for supply

voltage less than 2.7V. The power-supply threshold and

_______________________________________________________________________________________

1...4 5 678 9 10...15

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