1

®

FN7045.3

EL2125

Ultra-Low Noise, Low Power, Wideband

Amplifier

The EL2125 is an ultra-low noise, wideband amplifier that

runs on half the supply current of competitive parts. It is

intended for use in systems such as ultrasound imaging

where a very small signal needs to be amplified by a large

amount without adding significant noise. Its low power

dissipation enables it to be packaged in the tiny SOT-23

package, which further helps systems where many input

channels create both space and power dissipation problems.

The EL2125 is stable for gains of 10 and greater and uses

traditional voltage feedback. This allows the use of reactive

elements in the feedback loop, a common requirement for

many filter topologies. It operates from ±2.5V to ±15V

supplies and is available in the 5 Ld SOT-23 and 8 Ld SOIC

packages.

The EL2125 is fabricated using Elantec’s proprietary

complementary bipolar process, and is specified for

operation from -45°C to +85°C.

Features

• Voltage noise of only 0.83nV/

√Hz

• Current noise of only 2.4pA/

√Hz

• 200µV offset voltage

• Low supply current - 10mA

• SOT-23 package available

• ±2.5V to ±15V operation

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Ultrasound input amplifiers

• Wideband instrumentation

• Communication equipment

• AGC and PLL active filters

• Wideband sensors

Pinouts

EL2125

(5 LD SOT-23)

TOP VIEW

EL2125

(8 LD SOIC)

TOP VIEW

Ordering Information

PART NUMBER

PART

MARKING

TAPE &

REEL

PACKAGE

PKG.

DWG. #

EL2125CW-T7

F

7”

(3k pcs)

5 Ld SOT-23 MDP0038

EL2125CW-T7A

F

7”

(250 pcs)

5 Ld SOT-23 MDP0038

EL2125CS

2125CS

-

8 Ld SOIC

MDP0027

EL2125CS-T7

2125CS

7”

8 Ld SOIC

MDP0027

EL2125CS-T13

2125CS

13”

8 Ld SOIC

MDP0027

EL2125CSZ

(See Note)

2125CSZ

-

8 Ld SOIC

(Pb-free)

MDP0027

EL2125CSZ-T7

(See Note)

2125CSZ

7”

8 Ld SOIC

(Pb-free)

MDP0027

EL2125CSZ-T13

(See Note)

2125CSZ

13”

8 Ld SOIC

(Pb-free)

MDP0027

NOTE: Intersil Pb-free 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.

1

2

3

5

4

-

+

OUT

VS-

IN+

VS+

IN-

1

2

3

4

8

7

6

5

OUT

VS-

IN+

VS+

IN-

-

+

NC

NC

NC

Data Sheet

May 4, 2007

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

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

Copyright Intersil Americas Inc. 2003, 2005, 2007. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.