1

®

FN2992.8

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

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HFA1112

850MHz, Low Distortion Programmable

Gain Buffer Amplifiers

The HFA1112 is a closed loop Buffer featuring user

programmable gain and ultra high speed performance.

Manufactured on Intersil’s proprietary complementary

bipolar UHF-1 process, these devices offer a wide -3dB

bandwidth of 850MHz, very fast slew rate, excellent gain

flatness, low distortion and high output current.

A unique feature of the pinout allows the user to select a

voltage gain of +1, -1, or +2, without the use of any external

components. Gain selection is accomplished via

connections to the inputs, as described in the “Application

Information” section. 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.

This amplifier is available with programmable output limiting

as the HFA1113. For applications requiring a standard buffer

pinout, please refer to the HFA1110 data sheet.

HFA1112 (PDIP, SOIC)

TOP VIEW

Features

• User Programmable for Closed-Loop Gains of +1, -1 or +2

without Use of External Resistors

• Wide -3dB Bandwidth. . . . . . . . . . . . . . . . . . . . . . 850MHz

• Very Fast Slew Rate . . . . . . . . . . . . . . . . . . . . . . 2400V/

µs

• Fast Settling Time (0.1%) . . . . . . . . . . . . . . . . . . . . . 11ns

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

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

• Overdrive Recovery . . . . . . . . . . . . . . . . . . . . . . . . <10ns

• Standard Operational Amplifier Pinout

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• RF/IF Processors

• Driving Flash A/D Converters

• High-Speed Communications

• Impedance Transformation

• Line Driving

• Video Switching and Routing

• Radar Systems

• Medical Imaging Systems

• Related Literature

- AN9507, Video Cable Drivers Save Board Space

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Pin Descriptions

NAME

PIN NUMBER

DESCRIPTION

NC

1, 5, 8

No Connection

-IN

2

Inverting Input

+IN

3

Non-Inverting Input

V-

4

Negative Supply

OUT

6

Output

V+

7

Positive Supply

NC

-IN

+IN

V-

1

2

3

4

8

7

6

5

NC

V+

OUT

NC

+

300

300

-

Ordering Information

PART NUMBER

(BRAND)

TEMP.

RANGE (°C)

PACKAGE

PKG.

DWG. #

HFA1112IP

-40 to 85

8 Ld PDIP

E8.3

HFA1112IB

(1112IB)

-40 to 85

8 Ld SOIC

M8.15

HFA1112IB96

(1112IB)

8 Ld SOIC Tape and Reel

M8.15

HFA1112IBZ

(1112IBZ) (Note)

-40 to 85

8 Ld SOIC

(Pb-free)

M8.15

HFA1112IBZ96

(1112IBZ) (Note)

8 Ld SOIC Tape and Reel

(Pb-free)

M8.15

HFA11XXEVAL

High Speed Op Amp DIP Evaluation Board

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

July 27, 2005