EL4095C
Video Gain Control/Fader/Multiplexer
Features
# Full function video fader
General Description
The EL4095C is a versatile variable-gain building block. At its
core is a fader which can variably blend two inputs together and
an output amplifier that can drive heavy loads. Each input ap-
pears as the input of a current-feedback amplifier and with ex-
ternal resistors can separately provide any gain desired. The
output is defined as:
# 0.02%/0.02 differential gain/
§
@
phase 100% gain
# 25 ns multiplexer included
# Output amplifier included
# Calibrated linear gain control
e
a
a
) B*V
GAIN
V
OUT
A*V
(0. 5V
V
(0.5V–V
),
GAIN
INA
INB
g
g
5V to 15V operation
#
# 60 MHz bandwidth
# Low thermal errors
where A and B are the fed-back gains of each channel.
Additionally, two logic inputs are provided which each override
the analog V control and force 100% gain for one input
GAIN
Applications
# Video faders/wipers
# Gain control
and 0% for the other. The logic inputs switch in only 25 ns and
provide high attenuation to the off channel, while generating
very small glitches.
# Graphics overlay
# Video text insertion
# Level adjust
Signal bandwidth is 60 MHz, and gain-control bandwidth
20 MHz. The gain control recovers from overdrive in only
70 ns.
# Modulation
g
g
The EL4095C operates from 5V to 15V power supplies, and
is available in both 14-pin DIP and narrow surface mount pack-
ages.
Ordering Information
Ý
Outline
Part No.
Temp. Range
Package
b
a
40 C to 85 C 14 Pin P-DIP MDP0031
EL4095CN
EL4095CS
§
§
Connection Diagram
b
a
40 C to 85 C SO-14
MDP0027
§
§
14-Pin DIP, SO
4095–1
Top View
Manufactured under U.S. Patent No. 5,321,371, 5,374,898
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a ‘‘controlled document’’. Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
©
1992 Elantec, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
