1

®

FN6192.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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ISL4089

DC-Restored Video Amplifier

The ISL4089 is complete DC-restored monolithic video

amplifier sub-system. It contains a high performance video

amplifier and a nulling, sample-and-hold amplifier designed

to establish a programmable DC output level.

When the HOLD logic input “0” is applied the DC restore

function is active. The sample-and-hold amplifier loop is

closed and used to null the DC offset of the video amplifier.

This can occur during sync, or, at any time that a black level

is expected. When the HOLD input “1” is applied, the

correcting voltage is stored on the video amplifier’s input

coupling capacitor. This condition must be true during active

video. The restored DC voltage level can be adjusted using

The device operates from a single +5V supply and is ideal

for +5V only systems when used with a sync separator, such

as the EL1883.

The ISL4089 is intended to directly replace the EL4089 only

in certain applications. This direct replacement requires that

the single positive supply is no higher than +5.5V and that no

part of the clamped output goes below ground. The NC on

pin 6 is not internally connected, so it can be connected to

the -5V pin in existing EL4089 applications.

The ISL4089 is specified for operation over -40°C to +85°C

temperature range.

Pinout

ISL4089

(8 Ld SOIC)

TOP VIEW

Features

• Complete video level DC-restoration system

• 0.03% differential gain and 0.05° differential phase

accuracy

• 300V/µs Slew Rate

• 0.1dB flatness to 80MHz

• +5V single supply operation

• TTL/CMOS compatible hold signal

• Pb-free plus anneal available (RoHS compliant)

Applications

• Input amplifier in video equipment

• DC-restoration amplifier in video mixers

Related Documents

• AN1261: ISL4089EVAL1 User’s Guide

• AN1089: EL4089 and EL4390 DC-Restored Video

Amplifier

+

-

+

GND

N/C

V

OUT

V+

HOLD

V

REF

IN+

IN-

+

-

+

+

-

+

GND

N/C

V

OUT

V+

HOLD

V

REF

IN+

IN-

Ordering Information

PART NUMBER

PART

MARKING

TAPE &

REEL

PACKAGE

PKG.

DWG. #

ISL4089IBZ

(See Note)

4089IBZ

-

8 Ld SO

(Pb-free)

MDP0027

ISL4089IBZ-T7

(See Note)

4089IBZ

7”

8 Ld SO

(Pb-free)

MDP0027

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

Data Sheet

June 28, 2006