®
EL4089
Data Sheet
July 1998, Rev C
FN7158
DC Restored Video Amplifier
The EL4089 is an 8-pin complete DC-
restored monolithic video amplifier
sub-system. It contains a high quality
video amplifier and a nulling, sample-and-hold amplifier
specifically designed to stabilize video performance.
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 amplifier.
When the HOLD input goes to a TTL/CMOS logic l, the
correcting 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.
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 75Ω
lines.
The EL4089 is fabricated in Elantec’s proprietary
Complementary Bipolar process which produces NPN and
PNP transistors with equivalent AC and DC performance.
The EL4089 is specified for operation over -40°C to +85°C
temperature range.
Features
• Complete video level restoration system
• 0.02% differential gain and 0.05° differential phase
accuracy at NTSC
• 60MHz bandwidth
• 0.1dB flatness to 10MHz
• V
S
= ±5V to ±15V
• TTL/CMOS hold signal
Applications
• Input amplifier in video equipment
• Restoration amplifier in video mixers
Ordering Information
PART
NUMBER
EL4089CN
EL4089CS
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
8-Pin PDIP
8-Pin SO
PKG. NO.
MDP0031
MDP0027
Pinout
EL4089
(8-PIN PDIP, SO)
TOP VIEW
DC Restoring Amplifier with a gain of 2, restoring to ground
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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