THS4271

THS4275

SLOS397E − JULY 2002 − REVISED JANUARY 2004

LOW NOISE, HIGH SLEW RATE, UNITY GAIN STABLE VOLTAGE

FEEDBACK AMPLIFIER

DGK-8

DGN-8

D-8

DRB-8

FEATURES

− 3 nV/

√Hz

− −92 dBc THD at 30 MHz

− +5 V,

±5 V, +12 V, +15 V

DESCRIPTION

The THS4271 and THS4275 are low-noise, high slew rate,

unity gain stable voltage feedback amplifiers designed to

run from supply voltages as low as 5 V and as high as 15 V.

The THS4275 offers the same performance as the

THS4271 with the addition of power down capability. The

combination of low-noise, high slew rate, wide bandwidth,

low distortion, and unity gain stability make the THS4271

and THS4275 high performance devices across multiple

ac specifications.

Designers using the THS4271 are rewarded with higher

dynamic range over a wider frequency band without the

stability concerns of decompensated amplifiers. The

devices are available in SOIC, MSOP with PowerPAD

,

and leadless MSOP with PowerPAD

 packages.

APPLICATIONS

1

2

3

4

8

7

6

5

NC

IN−

IN+

NC

NC

THS4271

RELATED DEVICES

DEVICE

DESCRIPTION

THS4211

1-GHz voltage feedback amplifier

THS4503

Wideband fully differential amplifier

THS3202

Dual, wideband current feedback amplifier

_

+

249

Ω

+5 V

49.9

Ω

VI

−5 V

50

Ω Source

Low-Noise, Low-Distortion, Wideband Application Circuit

NOTE: Power supply decoupling capacitors not shown

VO

249

Ω

50

Ω

THS4271

This document contains information on products in more than one phase of

development. The status of each device is indicated on the page(s) specifying its

electrical characteristics.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

www.ti.com

Copyright

 2002 − 2004, Texas Instruments Incorporated

PowerPAD is a trademark of Texas Instruments.

−100

−90

−80

−70

−60

−50

−40

1

10

100

Gain = 2

Rf = 249 Ω

RL = 150 Ω

VO = 2 VPP

VS = ±5 V

HARMONIC AND INTERMODULATION

DISTORTION

vs

FREQUENCY

f − Frequency − MHz

IMD3

200 kHz Tone Spacing

VO = 2 VPP Envelope

HD3

HD2