Datasheet > EL2111CW

EL2111CW

更新时间： 2024-01-06 10:32:54

品牌	Logo	应用领域
英特矽尔 - INTERSIL		运算放大器光电二极管局域网
页数	文件大小	规格书
6页	103K
描述
Low Cost, Gain of 2, Video Op Amp

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技术参数
数据手册

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EL2111CW 技术参数

生命周期：	Obsolete	包装说明：	SOT-23, 5 PIN
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	风险等级：	5.84
Is Samacsys：	N	放大器类型：	OPERATIONAL AMPLIFIER
JESD-30 代码：	R-PDSO-G5	长度：	2.9 mm
功能数量：	1	端子数量：	5
封装主体材料：	PLASTIC/EPOXY	封装代码：	LSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
认证状态：	Not Qualified	座面最大高度：	1.45 mm
子类别：	Operational Amplifier	表面贴装：	YES
技术：	BIPOLAR	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	0.95 mm
端子位置：	DUAL	宽度：	1.6 mm
Base Number Matches：	1

EL2111CW 数据手册

EL2111

matching resistor to a cable and a 75Ω load to ground at the

end of the cable provide a 150Ω DC load. But output

capacitive coupling opens this DC path so an extra pulldown

resistor on the amplifier output to ground is required.

Figure 4 shows a 250Ω resistor. Capacitively coupling the

output will require that we shift the output offset voltage

(Figure 2) and with a white picture level is about 583mV

(Figure 3). This gives a maximum change in average value

of about 555mV. A direct coupled amplifier with an standard

NTSC video signal needs a dynamic range of 1.143V. But

with input capacitance coupling the dynamic range

requirements are the sum of the 1.143V video plus the

higher than in the direct coupled case. Using R = 43k and

average picture value change of 0.555V or 1.698V . At a

P-P

R = 4.7k will make the quiescent output offset voltage

about 1V. The output dynamic range will be 0.6V to 3V.

gain of two this doubles to 3.394V. These amplifiers do not

have this much dynamic range so a gain of less than 2 must

be used to avoid waveform compression under all

conditions.

Input capacitive coupling will increase the needed dynamic

range of the amplifier. The standard NTSC video signal is 1V

peak to peak plus 143mV for the color AC peak. The video

signal is made up of the -286mV sync pulse plus the 714mV

picture signal which may very from 0V to 714mV. The video

signal average value for a black picture is about 28mV

Capacitively coupling the input and output is worse than a

capacitor only on the input. Without any special

compromises you can only take a gain of one. But if the

backmatch resistor is reduced to 36Ω, reducing the output

0.1µF

0.32VB 68K

4.7K

OUT

0.64VB

V AMP

AMP

Video

–

FIGURE 1.

Gain = 2

1.8V offset

Amp

Ý10µs

OutVolts

53µs

1.428

1.166

2.062

1.8

0.714V

0.6

0.583V

0.867

0.0V

+0.348

+0.062

-0.286V

-0.572

1.3µs

3.8µs

5.1µs

FIGURE 2. WHITE LEVEL VIDEO

Gain = 2

+56mV

1.8V offset

Amp Out

Volts

0.714V

+3.172

Average BL

+45mV

53mV

0.686V +28mV

0.0V

+1.8

-0.286V

+1.172

Average Picture Value Change — 555mV

FIGURE 3. BLACK LEVEL VIDEO

1 2 3 456

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与EL2111CW相关器件

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EL21150000J0G	AMPHENOL	获取价格	Strip Terminal Block,
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EL212(TA)-V	EVERLIGHT	获取价格	8 PIN SOP PHOTOTRANSISTOR
EL212(TB)	EVERLIGHT	获取价格	Transistor Output Optocoupler, 1-Element, 3750V Isolation, SOP-8
EL212(TB)-V	EVERLIGHT	获取价格	8 PIN SOP PHOTOTRANSISTOR
EL2120	INTERSIL	获取价格	100MHz Current Feedback Amplifier
EL2120	ELANTEC	获取价格	100 MHz Current Feedback Amplifier
EL2120C	ELANTEC	获取价格	100 MHz Current Feedback Amplifier
EL2120CN	ELANTEC	获取价格	100 MHz Current Feedback Amplifier

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