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TM

HFA1115

225MHz, Low Power, Output

Limiting, Closed Loop Buffer Amplifier

The HFA1115 is a high speed closed loop Buffer featuring both

user programmable gain and output limiting. Manufactured on

Intersil’s proprietary complementary bipolar UHF-1 process, the

HFA1115 also offers a wide -3dB bandwidth of 225MHz, very

fast slew rate, excellent gain flatness and high output current.

This buffer is the ideal choice for high frequency applications

requiring output limiting, especially those needing ultra fast

overload recovery times. The limiting function allows the

designer to set the maximum positive and negative output

levels, thereby protecting later stages from damage or input

saturation. The HFA1115 also allows for voltage gains of +2,

+1, and -1, without the use of external resistors. Gain

selection is accomplished via connections to the inputs, as

described in the “Application Information” text. The result is a

more flexible product, fewer part types in inventory, and more

efficient use of board space.

Compatibility with existing op amp pinouts provides flexibility

to upgrade low gain amplifiers, while decreasing component

count. Unlike most buffers, the standard pinout provides an

upgrade path, should a higher closed loop gain be needed at

a future date. For Military product, refer to the HFA1115/883

data sheet.

Pinout

HFA1115

(PDIP, SOIC)

TOP VIEW

Features

• User Programmable Output Voltage Limiting

• High Input Impedance . . . . . . . . . . . . . . . . . . . . . . . 1M

Ω

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

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

• Low Supply Current . . . . . . . . . . . . . . . . . . . . . . . . 7.1mA

• High Output Current . . . . . . . . . . . . . . . . . . . . . . . . . 60mA

• Excellent Gain Accuracy . . . . . . . . . . . . . . . . . . . 0.99V/V

• User Programmable For Closed-Loop Gains of +1, -1 or

+2 Without Use of External Resistors

• Fast Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . <1ns

• Standard Operational Amplifier Pinout

Applications

• Flash A/D Drivers

• Video Cable Drivers

• High Resolution Monitors

• Professional Video Processing

• Medical Imaging

• Video Digitizing Boards/Systems

• Battery Powered Communications

Pin Descriptions

NAME

PIN NUMBER

DESCRIPTION

NC

1

No Connection

-IN

2

Inverting Input

+IN

3

Non-Inverting Input

V-

4

Negative Supply

5

Lower Output Limit

OUT

6

Output

V+

7

Positive Supply

8

Upper Output Limit

NC

-IN

+IN

V-

1

2

3

4

8

7

6

5

V+

OUT

+

_

350

350

Part # Information

PART NUMBER

(BRAND)

TEMP.

PACKAGE

PKG.

NO.

HFA1115IP

-40 to 85

8 Ld PDIP

E8.3

HFA1115IB

(H1115I)

-40 to 85

8 Ld SOIC

M8.15

HFA11XXEVAL

High Speed Op Amp DIP Evaluation Board

Data Sheets

July 2004

FN3606.5

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

1-888-INTERSIL or 1-888-468-3774

Copyright Harris Corporation 1998, Copyright Intersil Americas Inc. 2004. All Rights Reserved

OBSOL

ETE PR

ODUCT

POSSIBL

E SUBS

TITUTE

PRODU

CT

HFA111

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