EL4421CN Elantec Semiconductor, Inc. (acquired by Intersil), EL4421CN Datasheet - Page 9

• Manufacturer Part Number: EL4421CN
• Description: Multiplexed-input Video Amplifier
• Manufacturer: Elantec Semiconductor, Inc. (acquired by Intersil)

Typical Performance Curves
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
feedback network to set the gain of all inputs
These devices are wired for positive gains The
b
inputs wired in parallel allowing a single
Supply Current vs
Supply Voltage
8-Pin Package
Power Dissipation vs
Ambient Temperature
EL4421C 22C 41C 42C 43C 44C
4421 – 31
4421 – 33
Contd
Multiplexed-Input Video Amplifiers
9
EL4443 and EL4444 on the other hand have all
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
ed cables or maintaining bandwidth at higher
fed-back gains
a
inputs and
a
b
2 ideal for driving back-terminat-
Supply Current vs
Temperature
14-Pin Package
Power Dissipation vs
Ambient Temperature
inputs brought out separately so
4421 – 32
4421 – 34