EL4095CS INTERSIL [Intersil Corporation], EL4095CS Datasheet - Page 10

• Manufacturer Part Number: EL4095CS
• Description: Video Gain Control/Fader/Multiplexer
• Manufacturer: INTERSIL [Intersil Corporation]

EL4095
Test Circuit, A
= +1
V
Applications Information
The EL4095 is a general-purpose two-channel fader whose
input channels each act as a current-feedback amplifier
(CFA) input. Each input can have its own gain factor as
established by external resistors. For instance, the Test
Circuit shows two channels each arranged as +1 gain, with
the traditional single feedback resistor R
connected from
F
V
to the -V
of each channel.
OUT
IN
The EL4095 can be connected as an inverting amplifier in
the same manner as any CFA.
Frequency Response
Like other CFAs, there is a recommended feedback resistor,
which for this circuit is 1kΩ. The value of RF sets the closed-
loop -3dB bandwidth, and has only a small range of practical
variation. The user should consult the typical performance
curves to find the optional value of R
for a given circuit gain.
F
In general, the bandwidth will decrease slightly as closed-
loop gain is increased; R
can be reduced to make up for
F
bandwidth loss. Too small a value of R
will cause frequency
F
response peaking and ringing during transients. On the other
hand, increasing R
will reduce bandwidth but improve
F
stability.
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