1

FN3682.5

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

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HFA1245

Dual, 420MHz, Low Power, Video, Current

Feedback Operational Amplifier with

Disable

The HFA1245 is a dual, high speed, low power current

feedback amplifier built with Intersil’s proprietary

complementary bipolar UHF-1 process.

The HFA1245 features individual TTL/CMOS compatible

disable controls. When pulled low they disable the

corresponding amplifier, which reduces the supply current

and forces the output into a high impedance state. This

feature allows easy implementation of simple, low power

video switching and routing systems. Component and

composite video systems also benefit from this op amp’s

excellent gain flatness, and good differential gain and phase

specifications.

Multiplexed A/D applications will also find the HFA1245

useful as the A/D driver/multiplexer.

The HFA1245 is a low power, high performance upgrade for

the popular Intersil HA5022. For a dual amplifier without

disable, in a standard 8 lead pinout, please see the HFA1205

data sheet.

Pinout

HFA1245

(PDIP)

TOP VIEW

Features

• Low Supply Current . . . . . . . . . . . . . . . . . 5.8mA/Op Amp

• High Input Impedance . . . . . . . . . . . . . . . . . . . . . . . 2M

Ω

• Low Crosstalk (5MHz) . . . . . . . . . . . . . . . . . . . . . . . -83dB

• High Off Isolation (5MHz). . . . . . . . . . . . . . . . . . . . . 65dB

• Very Fast Slew Rate . . . . . . . . . . . . . . . . . . . . . 1200V/

μs

• Gain Flatness (to 50MHz) . . . . . . . . . . . . . . . . . .

±0.11dB

• Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02%

• Differential Phase. . . . . . . . . . . . . . . . . . . . . 0.03 Degrees

• Individual Output Enable/Disable

• Output Enable/Disable Time . . . . . . . . . . . . . 150ns/30ns

• Pin Compatible Upgrade to HA5022

Applications

• Flash A/D Drivers

• High Resolution Monitors

• Video Multiplexers

• Video Switching and Routing

• Professional Video Processing

• Video Digitizing Boards/Systems

• Multimedia Systems

•RGB Preamps

• Medical Imaging

• Hand Held and Miniaturized RF Equipment

• Battery Powered Communications

• High Speed Oscilloscopes and Analyzers

Part # Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HFA1245IP

-40 to 85

14 Ld PDIP

E14.3

HA5022EVAL

High Speed Op Amp DIP Evaluation Board

1

2

3

4

5

6

7

14

13

12

11

10

9

8

-IN1

+IN1

DISABLE 1

DISABLE 2

+IN2

-IN2

OUT2

NC

NC

NC

OUT1

GND

V+

+

-

+

-

V-

Data Sheet

July 2004

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ODUCT

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PLACE

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