Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

© 2001 Elantec Semiconductor, Inc.

Features

• Voltage noise of only 1.3nV/

√Hz

• Current noise of only 1.2pA/

√Hz

• Low offset voltage

≤200µV

• Very low supply current -4.7mA

• SOT23 package

• ±5V to ±15V operation

Applications

• Ultrasound input amplifiers

• Wideband instrumentation

• Communication equipment

• AGC & PLL active filters

• Wideband sensors

Ordering Information

Part No

Package

Tape & Reel

Outline #

EL2126CW

5-Pin SOT23

MDP0038

EL2126CS

8-Pin SO

MDP0027

EL2126CN

8-Pin PDIP

MDP0031

General Description

The EL2126C 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 SOT23

package, which further helps systems where many input channels cre-

ate both space and power dissipation problems.

The EL2126C is stable for gains of 10 and greater and uses traditional

voltage feedback. This allows the use of reactive elements in the feed-

back loop, a common requirement for many filter topologies. It

operates from ±5V to ±15V supplies and is available in a 5-pin SOT23

package and 8-pin SO and 8-pin PDIP packages.

The EL2126C is fabricated in Elantec’s proprietary complementary

bipolar process, and is specified for operation over the full -40°C to

+85°C temperature range.

Connection Diagrams

1

2

3

4

8

7

6

5

EL2126C

(8-Pin SO and 8-Pin PDIP)

1

2

3

5

4

EL2126C

(5-Pin SOT23)

-

+

-

+

VS+

IN-

IN+

VS-

OUT

NC

IN-

IN+

VS-

NC

VS+

OUT

NC

EL2126C - Preliminary

Ultra-low Noise, Low Power, Wideband Amplifier