Datasheet > EL4450CN

EL4450CN

更新时间： 2024-02-18 11:05:42

品牌	Logo	应用领域
英特矽尔 - INTERSIL		光电二极管
页数	文件大小	规格书
10页	170K
描述
Wideband Four-Quadrant Multiplier

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技术参数
数据手册

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EL4450CN 技术参数

生命周期：	Transferred	包装说明：	SO-14
Reach Compliance Code：	unknown	风险等级：	5.71
模拟集成电路 - 其他类型：	ANALOG MULTIPLIER OR DIVIDER	标称带宽：	90 MHz
JESD-30 代码：	R-PDSO-G14	负电源电压最大值（Vsup）：	-15 V
负电源电压最小值（Vsup）：	-5 V	标称负供电电压 (Vsup)：	-5 V
最大负输入电压：	-2 V	功能数量：	1
端子数量：	14	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
最大正输入电压：	2 V	认证状态：	Not Qualified
最大供电电压 (Vsup)：	15 V	最小供电电压 (Vsup)：	5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子位置：	DUAL	Base Number Matches：	1

EL4450CN 数据手册

EL4450

The maximum dissipation a package can offer is:

inputs between 200mVRMS and 1VRMS. The traditional use

of the EL4450 as an AGC detector and control loop would

be:

P ,max = (T ,max–T ,max)/θ

Where

T ,max is the maximum junction temperature, 150°C for

reliability, less to retain optimum electrical performance

T ,max is the ambient temperature, 70°C for commercial

and 85°C for industrial range

is the thermal resistance of the mounted package,

obtained from data sheet dissipation curves

The more difficult case is the SO-14 package. With a

maximum junction temperature of 150°C and a maximum

ambient temperature of 85°C, the 65°C temperature rise and

package thermal resistance of 120°/W gives a dissipation of

542mW at 85°C. This allows the full maximum operating

supply voltage unloaded, but reduced if loaded significantly.

FIGURE 1. TRADITIONAL AGC DETECTOR/DC

FEEDBACK CIRCUIT

The EL4450 simply provides an output equal to the square

of the input signal and an integrator filters out the AC

component, while comparing the DC component to an

amplitude reference. The integrator output is the DC control

voltage to the variable-gain sections of the AGC (not shown).

If a negative polarity of reference is required, one of the

multiplier input terminal pairs is reversed, inverting the

multiplier output. Input bias current will cause input voltage

offsets due to source impedances; putting a compensating

resistor in series with the grounded inputs of the EL4450 will

reduce this offset greatly.

Output Loading

The output stage is very powerful. It typically can source

85mA and sink 120mA. Of course, this is too much current to

sustain and the part will eventually be destroyed by

excessive dissipation or by metal traces on the die opening.

The metal traces are completely reliable while delivering the

30mA continuous output given in the Absolute Maximum

Ratings table in this data sheet, or higher purely transient

currents.

Gain accuracy degrades only 0.2% from no load to 100Ω

load. Heavy resistive loading will degrade frequency

response and video distortion for loads < 100Ω.

This control system will attempt to force:

,RMS /4=V

REF

Capacitive loads will cause peaking in the frequency

response. If a capacitive load must be driven, a small-valued

series resistor can be used to isolate it. 12Ω to 51Ω should

suffice. A 22Ω series resistor will limit peaking to 2.5dB with

even a 220pF load.

Mixer Applications

Because of its lower distortion levels, the Y input is the better

choice for a mixer’s signal port. The X input would receive

oscillator amplitudes of about 1V RMS maximum. Carrier

suppression is initially limited by the offset voltage of the Y

input, 20mV maximum, and is about 37dB worst-case. Better

suppression can be obtained by nulling the offset of the X

input. Similarly, nulling the offset of the Y input will improve

signal-port suppression. Driving an input differentially will

also maximize feedthrough suppression at frequencies

beyond 10MHz.

AC Level Detectors

Square-law converters are commonly used to convert AC

signals to DC voltages corresponding to the original

amplitude in subsystems like automatic gain controls (AGCs)

and amplitude-stabilized oscillators. Due to the controlled AC

amplitudes, the inputs of the multiplier will see a relatively

constant signal level. Best performance will be obtained for

1...4 5 678 9 10

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与EL4450CN相关器件

型号	品牌	描述	获取价格	数据表
EL4450CS	ELANTEC	Wideband Four-Quadrant Multiplier	获取价格
EL4450CS-T13	ELANTEC	Analog Multiplier Or Divider, 1 Func, 90MHz Band Width, PDSO14, SO-14	获取价格
EL4450CS-T7	ELANTEC	Analog Multiplier Or Divider, 1 Func, 90MHz Band Width, PDSO14, SO-14	获取价格
EL4451	ELANTEC	Wideband Variable-Gain Amplifier, Gain of 2	获取价格
EL4451	INTERSIL	Wideband Variable-Gain Amplifier, Gain of 2	获取价格
EL4451C	ELANTEC	Wideband Variable-Gain Amplifier, Gain of 2	获取价格

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