FN7158 Rev.0.00

Page 1 of 9

July 1998

FN7158

Rev.0.00

July 1998

EL4089

DC Restored Video Amplifier

DATASHEET

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 75



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.

Pinout

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

•VS = ±5V to ±15V

• TTL/CMOS hold signal

Applications

• Input amplifier in video equipment

• Restoration amplifier in video mixers

DC Restoring Amplifier with a gain of 2, restoring to ground

EL4089

(8-PIN PDIP, SO)

TOP VIEW

Ordering Information

PART

NUMBER

TEMP. RANGE

PACKAGE

PKG. NO.

EL4089CN

-40°C to +85°C

8-Pin PDIP

MDP0031

EL4089CS

-40°C to +85°C

8-Pin SO

MDP0027