REV. A

a

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High Current Output,

Triple Video Amplifier

FEATURES

Drives 13 V Output

Drives Unlimited Capacitive Load

High Current Output Drive: 70 mA

)

Gain Flatness 0.1 dB to 10 MHz

0.06% Differential Gain Error

0.02 Differential Phase Error

Power

Operates on

2.5 V to

7.5 V Supply

10.0 mA/Amplifier Max Power Supply Current

High Speed

250 MHz Unity Gain Bandwidth (3 dB)

1200 V/ s Slew Rate

Fast Settling Time of 35 ns (0.1%)

High Speed Disable Function

Turn-Off Time 30 ns

Easy to Use

200 mA Short Circuit Current

Output Swing to 1 V of Rails

APPLICATIONS

LCD Displays

Video Line Driver

Broadcast and Professional Video

Computer Video Plug-In Boards

Consumer Video

RGB Amplifier in Component Systems

AD8023

PRODUCT DESCRIPTION

The AD8023 is a high current output drive, high voltage output

drive, triple video amplifier. Each amplifier has 70 mA of output

current and is optimized for driving large capacitive loads. The

amplifiers are current feedback amplifiers and feature gain

flatness of 0.1 dB to 10 MHz while offering differential gain and

phase error of 0.06% and 0.02

°.

The AD8023 uses maximum supply current of 10.0 mA per

amplifier and runs on

±2.5 V to ±7.5 V power supply. The

outputs of each amplifier swing to within one volt of either

supply rail to easily accommodate video signals. The AD8023

is unique among current feedback op amps by virtue of its large

capacitive load drive with a small series resistor, while still

achieving rapid settling time. For instance, it can settle to 0.1% in

35 ns while driving 300 pF capacitance.

The bandwidth of 250 MHz along with a 1200 V/

µs slew rate

make the AD8023 useful in high speed applications requiring

a single +5 V or dual power supplies up to

±7.5 V. Further-

more, the AD8023 contains a high speed disable function for

each amplifier in order to power down the amplifier or high

impedance the output. This can then be used in video multi-

plexing applications. The AD8023 is available in the indus-

trial temperature range of –40

°C to +85°C.

PIN CONFIGURATION

14-Lead SOIC

14

13

12

11

10

9

8

1

2

3

4

7

6

5

DISABLE 1

+IN 2

–IN 2

OUT 2

DISABLE 2

DISABLE 3

AD8023

OUT 3

–IN 3

+IN 3

+IN 1

–IN 1

OUT 1

V

IN

Figure 1. Pulse Response Driving a Large Load Capacitor,

Figure 2. Output Swing Voltage,

V

IN

V

O

V

O

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2000