EL4095CS datasheet(11/24 Pages) ELANTEC

11 / 24 page

EL4095C

Video Gain ControlFaderMultiplexer

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 exter-

nal resistors For instance the Test Circuit shows

two channels each arranged as a1 gain with the

traditional single feedback resistor RF connected

from VOUT to the bVIN of each channel

The EL4095 can be connected as an inverting

amplifier in the same manner as any CFA

Frequency Response

Like other CFA’s there is a recommended feed-

back resistor which for this circuit is 1 K

X The

value of RF sets the closed-loop b3 dB band-

width and has only a small range of practical

variation The user should consult the typical

performance curves to find the optional value of

RF for a given circuit gain In general the band-

width will decrease slightly as closed-loop gain is

increased RF can be reduced to make up for

bandwidth loss Too small a value of RF will

cause frequency response peaking and ringing

during transients On the other hand increasing

RF will reduce bandwidth but improve stability

EL4095C In Inverting Connection

4095 – 27

EL4095CS Datasheet(PDF) 11 Page - Elantec Semiconductor