EL4089C
DC Restored Video Amplifier
Features
# Complete video level restoration
system
General Description
The EL4089C is an 8-pin complete DC-restored monolithic vid-
eo amplifier sub-system. It contains a high quality video ampli-
fier and a nulling, sample-and-hold amplifier specifically de-
signed to stabilize video performance.
# 0.02% differential gain and 0.05
differential phase accuracy at
NTSC
§
When the HOLD logic input is set to a TTL/CMOS logic 0, the
sample- and-hold amplifier can be used to null the DC offset of
the video amplifer.
# 60 MHz bandwidth
# 0.1 dB flatness to 10 MHz
e
g
g
5V to 15V
# V
S
When the HOLD input goes to a TTL/CMOS logic l, the cor-
recting voltage is stored on the video amplifier’s input coupling
capacitor. The correction voltage can be further corrected as
need be, on each video line.
# TTL/CMOS hold signal
Applications
# Input amplifier in video
equipment
The video amplifier is optimized for video performance and low
power. Its current feedback design allows the user to maintain
essentially the same bandwidth over a gain range of nearly 10:1.
The amplifier drives back-terminated 75X lines.
# Restoration amplifier in video
mixers
Ordering Information
The EL4089C is fabricated in Elantec’s proprietary Comple-
mentary Bipolar process which produces NPN and PNP tran-
sistors with equivalent AC and DC performance. The EL4089C
Ý
Outline
Part No.
Temp. Range
Package
a
EL4089CN 0 C to 75 C
8-Pin P-DIP MDP0031
§
§
a
EL4089CS 0 C to 75 C
8-Lead SO
MDP0027
§
§
a
is specified for operation over 0 C to 75 C temperature range.
§
§
Connection Diagram
4089–1
DC restoring amplifier with a gain of 2, restoring to ground.
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.
©
1993 Elantec, Inc.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
