intersil EL2126 DATA SHEET

®

EL2126

FN7046.4Data Sheet May 2, 2007

Ultra-Low Noise, Low Power, Wideband
Amplifier

The EL2126 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 EL2126 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 SO
packages.

The EL2126 is fabricated in Elantec’s proprietary
complementary bipolar process, and is specified for
operation over the full -40°C to +85°C temperature range.

Pinouts

EL2126

(5 LD SOT-23)

TOP VIEW

Features

• Voltage noise of only 1.3nV/√Hz

• Current noise of only 1.2pA/√Hz

• 200µV offset voltage

• 100MHz -3dB BW for A

= 10

V

• Very low supply current - 4.7mA

• SOT-23 package

• ±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

OUT

VS-

NC

IN-

IN+

VS-

1

2

3

1

2

3

4

-+

EL2126

(8 LD SOIC)

TOP VIEW

-

+

5

VS+

4

IN-IN+

NC

8

VS+

7

OUT

6

NC

5

1

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

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

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright Intersil Americas Inc. 2002, 2005, 2007. All Rights Reserved

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

Ordering Information

EL2126

PART

NUMBER

EL2126CW-T7 G -40 to +85 7” (3k pcs) 5 Ld SOT-23 MDP0038
EL2126CW-T7A G -40 to +85 7” (250 pcs) 5 Ld SOT-23 MDP0038
EL2126CS 2126CS -40 to +85 - 8 Ld SOIC (150 mil) MDP0027
EL2126CS-T7 2126CS -40 to +85 7” 8 Ld SOIC (150 mil) MDP0027
EL2126CS-T13 2126CS -40 to +85 13” 8 Ld SOIC (150 mil) MDP0027
EL2126CSZ ( Note) 2126CSZ -40 to +85 - 8 Ld SOIC (150 mil)

EL2126CSZ-T7 ( Note) 2126CSZ -40 to +85 7” 8 Ld SOIC (150 mil)

EL2126CSZ-T13 ( Note) 2126CSZ -40 to +85 13” 8 Ld SOIC (150 mil)

EL2126CWZ-T7 (Note) BAAH -40 to +85 7” 5 Ld SOT-23 (SC74)

EL2126CWZ-T7A (Note) BAAH -40 to +85 7” 5 Ld SOT-23 (SC74)

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.

PART

MARKING

TEMP RANGE

(°C) TAPE AND REEL PACKAGE PKG. DWG. #

MDP0027

(Pb-free)

MDP0027

(Pb-free)

MDP0027

(Pb-free)

P5.064

(1.65mm) (Green)

P5.064

(1.65mm) (Green)

2

FN7046.4

May 2, 2007

EL2126

Absolute Maximum Ratings Thermal Information

VS+ to VS-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33V

Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA

Any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . V

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = T

+ -0.3V to VS- +0.3V

S

A

Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-60°C to +150°C

Maximum Die Junction Temperature. . . . . . . . . . . . . . . . . . .+150°C

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

Electrical Specifications V

+ = +5V, VS- = -5V, TA = +25°C, RF = 180Ω, RG = 20Ω, RL = 500Ω Unless Otherwise Specified.

S

Parameter Description Conditions Min Typ Max Unit

DC PERFORMANCE

V

OS

Input Offset Voltage (SO8) 0.2 2 mV
Input Offset Voltage (SOT23-5) 3mV

T

CVOS

I

B

I

OS

T

CIB

C

IN

A

VOL

PSRR Power Supply Rejection Ratio

Offset Voltage Temperature

17 µV/°C

Coefficient
Input Bias Current -10 -7 µA
Input Bias Current Offset 0.06 0.6 µA
Input Bias Current Temperature

0.013 µA/°C

Coefficient
Input Capacitance 2.2 pF
Open Loop Gain VO = -2.5V to +2.5V 80 87 dB

80 100 dB

(Note 1)
CMRR Common Mode Rejection Ratio at CMIR 75 106 dB
CMIR Common Mode Input Range -4.6 3.8 V
V

OUTH

V

OUTL

V

OUTH2

V

OUTL2

I

OUT

I

SY

AC PERFORMANCE - R

BW -3dB Bandwidth, R
BW ±0.1dB ±0.1dB Bandwidth, R
BW ±1dB ±1dB Bandwidth, R
Peaking Peaking, R
SR Slew Rate V
OS Overshoot, 4V

t

S

Positive Output Voltage Swing No load, RF = 1kΩ 3.8 3.8 V

Negative Output Voltage Swing No load, RF = 1kΩ -4 -3.9 V

Positive Output Voltage Swing RL = 100Ω 3.2 3.45 V

Negative Output Voltage Swing RL = 100Ω -3.5 -3.2 V

Output Short Circuit Current

80 100 mA

(Note 2)

Supply Current 4.7 5.5 mA

= 20Ω, CL = 3pF

G

= 500Ω 100 MHz

L

= 500Ω 17 MHz

L

= 500Ω 80 MHz

L

= 500Ω 0.6 dB

L

Wave

Output Square

P-P

= 2V

OUT

Positive 2.8 %
Negative -7 %

, measured at 20% to 80% 80 110 V/µs

P-P

Settling Time to 0.1% of ±1V Pulse 51 ns

3

FN7046.4

May 2, 2007

EL2126

Electrical Specifications V

+ = +5V, VS- = -5V, TA = +25°C, RF = 180Ω, R

S

: , R

G

: Unless Otherwise Specified.

L

Parameter Description Conditions Min Typ Max Unit

V

N

I

N

Voltage Noise Spectral Density 1.3 nV/√Hz

Current Noise Spectral Density 1.2 pA/√Hz
HD2 2nd Harmonic Distortion (Note 3) -70 dBc
HD3 3rd Harmonic Distortion (Note 3) -70 dBc

NOTES:

1. Measured by moving the supplies from ±4V to ±6V

2. Pulse test only and using a 10Ω load

3. Frequency = 1MHz, V

OUT

= 2V

Electrical Specifications V

P-P

+ = +15V, VS- = -15V, TA = 25°C, R

S

: and 5pF load

: , R

F

= 20Ω, R

G

: unless otherwise specified.

L

Parameter Description Conditions Min Typ Max Unit
DC PERFORMANCE
V

OS

Input Offset Voltage (SO8) 0.5 3 mV
Input Offset Voltage (SOT23-5) 3mV

T

CVOS

Offset Voltage Temperature

4.5 µV/°C

Coefficient
I
I
T

B
OS

CIB

Input Bias Current -10 -7 µA

Input Bias Current Offset 0.12 0.7 µA

Input Bias Current Temperature

0.016 µA/°C

Coefficient
C

IN

A

VOL

PSRR Power Supply Rejection Ratio

Input Capacitance 2.2 pF

Open Loop Gain 80 90 dB

65 80 dB

(Note 4)
CMRR Common Mode Rejection Ratio at CMIR 70 85 dB
CMIR Common Mode Input Range -14.6 13.8 V
V

OUTH

V

OUTL

V

OUTH2

V

OUTL2

I

OUT

Positive Output Voltage Swing No load, R

Negative Output Voltage Swing No load, R

Positive Output Voltage Swing R

Negative Output Voltage Swing R

L
L

Output Short Circuit Current

: 13.6 13.7 V

F

: -13.8 -13.7 V

F

: , RF = 1k: 10.2 11.2 V
: , RF = 1k: -10.3 -9.5 V

140 220 mA

(Note 5)
I

SY

AC PERFORMANCE - R
BW -3dB Bandwidth, R
BW ±0.1dB ±0.1dB Bandwidth, R
BW ±1dB ±1dB Bandwidth, R
Peaking Peaking, R
SR Slew Rate (±2.5V Square Wave,

Supply Current 56mA

= 20: , CL = 3pF

G

: 135 MHz

L

: 26 MHz

L

: 60 MHz

L

: 2.1 dB

L

130 150 V/µS

Measured 25%-75%)
OS Overshoot, 4V

Wave

T

S

Settling Time to 0.1% of ±1V Pulse 48 ns

Output Square

P-P

Positive 1.6 %
Negative -4.4 %

4

FN7046.4

May 2, 2007

Electrical Specifications V

+ = +15V, VS- = -15V, TA = 25°C, RF = 180Ω, RG = 20Ω, RL = 500Ω unless otherwise specified. (Continued)

S

Parameter Description Conditions Min Typ Max Unit

V

N

I

N

Voltage Noise Spectral Density 1.4 nV/√Hz

Current Noise Spectral Density 1.1 pA/√Hz
HD2 2nd Harmonic Distortion (Note 6) -72 dBc
HD3 3rd Harmonic Distortion (Note 6) -73 dBc

NOTES:

4. Measured by moving the supplies from ±13.5V to ±16.5V

5. Pulse test only and using a 10Ω load

6. Frequency = 1MHz, V

OUT

= 2V

, into 500Ω and 5pF load

P-P

Typical Performance Curves

10

VS = ±5V

= 10

A

V

C

= 5pF

6

L

RL = 500Ω

2

-2

-6

NORMALIZED GAIN (dB)

-10
1M 10M 100M

RF = 500Ω

RF = 180Ω

FREQUENCY (Hz)

RF = 1kΩ

RF = 100Ω

FIGURE 1. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

8

4

0

-4

10

VS = ±15V

= 10

A

V

C

= 5pF

6

L

RL = 500Ω

2

-2

-6

NORMALIZED GAIN (dB)

-10
1M 10M 100M

RF = 1kΩ

RF = 500Ω

RF = 180Ω

RF = 100Ω

FREQUENCY (Hz)

FIGURE 2. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

-8

NORMALIZED GAIN (dB)

-12
1M 10M 100M

FREQUENCY (Hz)

FIGURE 3. INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

5

FIGURE 4. INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

May 2, 2007

FN7046.4

Typical Performance Curves (Continued)

FIGURE 5. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN

FIGURE 7. INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN

FIGURE 6. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN

FIGURE 8. INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

FIGURE 9. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS OUTPUT SIGNAL LEVELS

6

FIGURE 10. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS OUTPUT SIGNAL LEVELS

FN7046.4

May 2, 2007