Datasheet > EL6204CW-T7

EL6204CW-T7

更新时间： 2024-02-27 15:28:35

品牌	Logo	应用领域
英特矽尔 - INTERSIL		振荡器驱动器
页数	文件大小	规格书
10页	155K
描述
Laser Driver Oscillator

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技术参数
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EL6204CW-T7 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SOT-23	包装说明：	SOT-23, 6 PIN
针数：	6	Reach Compliance Code：	not_compliant
风险等级：	5.45	Is Samacsys：	N
接口集成电路类型：	INTERFACE CIRCUIT	JESD-30 代码：	R-PDSO-G6
JESD-609代码：	e0	长度：	2.9 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	6	最高工作温度：	70 °C
最低工作温度：		封装主体材料：	PLASTIC/EPOXY
封装代码：	LSSOP	封装等效代码：	TSOP6,.11,37
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	240	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	1.45 mm
子类别：	Display Drivers	最大供电电压：	5.5 V
最小供电电压：	4.5 V	标称供电电压：	5 V
表面贴装：	YES	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	1.6 mm
Base Number Matches：	1

EL6204CW-T7 数据手册

EL6204

and ensure that the high frequency components reach the

junction without having to charge the junction capacitance.

Applications Information

Product Description

Generally it is desirable to make the oscillator currents as

large as possible to obtain the greatest reduction in laser

noise. But it is not a trivial matter to determine this critical

value. The amplitude depends on the wave shape of the

oscillator current reaching the laser junction.

The EL6204 is a solid state, low-power, high-speed laser

modulation oscillator with external resistor-adjustable

operating frequency and output amplitude. It is designed to

interface easily to laser diodes to break up optical feedback

resonant modes and thereby reduce laser noise. The output

of the EL6204 is composed of a push-pull current source,

switched alternately at the oscillator frequency. The output

and oscillator are automatically disabled for power saving

when the average laser voltage drops to less than 1.1V. The

EL6204 has the operating frequency from 60MHz to

If the output current is sinusoidal, and the components in the

output circuit are fixed and linear, then the shape of the

current will be sinusoidal. But the amount of current reaching

the laser junction is a function of the circuit parasitics. These

parasitics can result in a resonant increase in output

600MHz and the output current from 10mA

The supply current is only 18.5mA for the output current of

to 100mA .

depending on the frequency due to the junction capacitance

and layout. Also, the amount of junction current causing

laser emission is variable with frequency due to the junction

P-P

50mA at the operating frequency of 350MHz.

P-P

capacitance. In conclusion, the sizes of the R

and

AMP

resistors must be determined experimentally. A good

Theory of Operation

FREQ

starting point is to take a value of R

A typical semiconductor laser will emit a small amount of

incoherent light at low values of forward laser current. But

after the threshold current is reached, the laser will emit

coherent light. Further increases in the forward current will

cause rapid increases in laser output power. A typical

threshold current is 35mA and a typical slope efficiency is

0.7mW/mA.

for a peak-to-peak

AMP

current amplitude less than the minimum laser threshold

current and a value of R for an output current close to a

FREQ

sinusoidal wave form (refer to the proceeding performance

curves).

and R

Pin Interfacing

FREQ

AMP

Figure 1 shows an equivalent circuit of pins associated with

the R and R resistors. V is roughly 1.27V for

When the laser is lasing, it will often change its mode of

AMP FREQ

REF

and R

operation slightly, due to changes in current, temperature, or

optical feedback into the laser. In a DVD-ROM, the optical

feedback from the moving disk forms a significant noise

factor due to feedback-induced mode hopping. In addition to

the mode hopping noise, a diode laser will roughly have a

constant noise level regardless of the power level when a

threshold current is exceeded.

both R

and R

. The R

resistors

AMP FREQ

AMP

FREQ

should be connected to the non-load side of the power

ground to avoid noise pick-up. These resistors should also

return to the EL6204's ground very directly to prevent noise

pickup. They also should have minimal capacitance to

ground. Trimmer resistors can be used to adjust initial

operating points.

The oscillator is designed to produce a low noise oscillating

current that is added to the external DC current. The

effective AC current is to cause the laser power to change at

the oscillator frequency. This change causes the laser to go

through rapid mode hopping. The low frequency component

of laser power noise due to mode hopping is translated up to

sidebands around the oscillator frequency by this action.

Since the oscillator frequency can be filtered out of the low

frequency read and serve channels, the net result is that the

laser noise seems to be reduced. The second source of

laser noise reduction is caused by the increase in the laser

power above the average laser power during the pushing-

current time. The signal-to-noise ratio (SNR) of the output

power is better at higher laser powers because of the almost

constant noise power when a threshold current is exceeded.

In addition, when the laser is off during the pulling-current

time, the noise is also very low.

REF

FIGURE 1. R

AMP

AND R

PIN INTERFACE

FREQ

External voltage sources can be coupled to the R

and

AMP

pins to effect frequency or amplitude modulation or

FREQ

adjustment. It is recommended that a coupling resistor of 1k

be installed in series with the control voltage and mounted

directly next to the pin. This will keep the inevitable high-

frequency noise of the EL6204's local environment from

propagating to the modulation source, and it will keep

parasitic capacitance at the pin minimized.

and R

Value Setting

FREQ

AMP

The laser should always have a forward current during

operation. This will prevent the laser voltage from collapsing,

1...5 6 789 10

中文翻译

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EL6204CW-T7 替代型号

型号	品牌	替代类型	描述	数据表
EL6204CWZ-T7A	INTERSIL	功能相似	Laser Driver Oscillator
EL6204CWZ-T7	INTERSIL	功能相似	Laser Driver Oscillator

与EL6204CW-T7相关器件

型号	品牌	获取价格	描述	数据表
EL6204CW-T7A	INTERSIL	获取价格	Laser Driver Oscillator
EL6204CWZ-T7	INTERSIL	获取价格	Laser Driver Oscillator
EL6204CWZ-T7A	INTERSIL	获取价格	Laser Driver Oscillator
E-L6204D	STMICROELECTRONICS	获取价格	2 CHANNEL, FULL BRIDGE BASED PRPHL DRVR, PDSO28, ROHS COMPLIANT, SOP-28
EL6205	INTERSIL	获取价格	Laser Driver Oscillator
EL6205C	ELANTEC	获取价格	Laser Driver Oscillator
EL6205CW	ELANTEC	获取价格	Laser Driver Oscillator
EL6205CW-T7	INTERSIL	获取价格	Laser Driver Oscillator
EL6205CW-T7A	INTERSIL	获取价格	Laser Driver Oscillator
EL6206	INTERSIL	获取价格	Laser Driver Oscillator

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