EL2082C View Datasheet(PDF) - Elantec -> Intersil

Part Name

Description

Manufacturer

EL2082C

Current-Mode Multiplier

Elantec -> Intersil 

Typical Performance Curves

8-Pin Plastic DIP

Maximum Power Dissipation

vs Ambient Temperature

Contd

EL2082C

Current-Mode Multiplier

8-Lead SO

Maximum Power Dissipation

vs Ambient Temperature

2082 – 11

2082 – 12

Applications Information

The EL2082 is best thought of as a current-conveyor with variable current gain A current input to the

IIN pin will be replicated as a current driven out the IOUT pin with a gain controlled by VGAIN Thus

an input of 1 mA will produce an output current of 1 mA for VGAIN e 1V An input of 1 mA will

produce an output of 2 mA for VGAIN e 2V The useable VGAIN range is zero to a2V A negative level

on VGAIN even only b20 mV will yield very high signal attenuation

The EL2082 in Conjunction with Op-Amps

This resistor-load circuit shows a simple method of converting voltage signals to currents and vice

versa

 J  J Gain e VGAIN

RL

1V RIN a95X

RF a RG

RG

EL2082 a Op-Amp

2082 – 13

RIN would typically be 1 kX for video level inputs or 10 kX for g10V instrumentation signals The

higher the value of RIN (the lower the input current) the lower the distortion levels of the EL2082 will

be An approximate expression of the nonlinearity of the EL2082 is

Nonlinearity (%) e 0 3 IIN (mA)2

Optimum input current level is a tradeoff between distortion and signal-to-noise-ratio The distortion

and input range do not change appreciably with VGAIN levels distortion is set by input currents alone

7

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