1

®

FN7045.2

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-pin SOT-23 and 8-pin SO

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 available (RoHS compliant)

Applications

• Ultrasound input amplifiers

• Wideband instrumentation

• Communication equipment

• AGC & PLL active filters

• Wideband sensors

Pinouts

EL2125

(5-PIN SOT-23)

TOP VIEW

EL2125

(8-PIN SO)

TOP VIEW

Ordering Information

PART NUMBER

PACKAGE

TAPE &

REEL

PKG. DWG. #

EL2125CW-T7

5-Pin SOT-23

7” (3K pcs)

MDP0038

EL2125CW-T7A

5-Pin SOT-23

7” (250 pcs)

MDP0038

EL2125CS

8-Pin SO

-

MDP0027

EL2125CS-T7

8-Pin SO

7”

MDP0027

EL2125CS-T13

8-Pin SO

13”

MDP0027

EL2125CSZ

(See Note)

8-Pin SO

(Pb-free)

-

MDP0027

EL2125CSZ-T7

(See Note)

8-Pin SO

(Pb-free)

7”

MDP0027

EL2125CSZ-T13

(See Note)

8-Pin SO

(Pb-free)

13”

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

April 21, 2005

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

1-888-INTERSIL or 1-888-352-6832

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

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