EL4441CS datasheet(9/16 Pages) ELANTEC

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EL4421C22C41C42C43C44C

Multiplexed-Input Video Amplifiers

Typical Performance Curves

Contd

Supply Voltage

Supply Current vs

4421 31

Temperature

Supply Current vs

4421 32

Ambient Temperature

Power Dissipation vs

8-Pin Package

4421 33

Ambient Temperature

Power Dissipation vs

14-Pin Package

4421 34

Applications Information

General Description

The EL44XX family of video mux-amps are com-

posed of two or four input stages whose inputs

are selected and control an output stage One of

the inputs is active at a time and the circuit be-

haves as a traditional voltage-feedback op-amp

for that input rejecting signals present at the un-

selected inputs Selection is controlled by one or

two logic inputs

The EL4421 EL4422 EL4441 and EL4442 have

all

inputs wired in parallel allowing a single

feedback network to set the gain of all inputs

These devices are wired for positive gains The

EL4443 and EL4444 on the other hand have all

inputs and

inputs brought out separately so

that the input stage can be wired for independent

gains and gain polarities with separate feedback

networks

The EL4421 EL4441 and EL4443 are compen-

sated for unity-gain stability while the EL4422

EL4442 and EL4444 are compensated for a fed-

back gain of a2 ideal for driving back-terminat-

ed cables or maintaining bandwidth at higher

fed-back gains

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