EL2126CS-T13 - Intersil Corporation

®EL2126

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 temper ature range.

Pinouts EL2126

(5 LD SOT-23)

TOP VIEW

EL2126

(8 LD SOIC)

TOP VIEW

Features

• Voltage noise of only 1.3nV/√Hz

• Current noise of only 1.2pA/√Hz

• 200µV offset voltage

• 100MHz -3dB BW for AV = 10

• 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

VS+

IN-IN+

VS-

OUT

IN-

IN+

VS-

VS+

OUT

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.

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

FN7046.4Data Sheet May 2, 2007

2FN7046.4

May 2, 2007

Ordering Information

PART

NUMBER PART

MARKING TEMP RANGE

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

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-2 3 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)

(Pb-free) MDP0027

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

(Pb-free) MDP0027

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

(Pb-free) MDP0027

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

(1.65mm) (Green) P5.064

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

(1.65mm) (Green) P5.064

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate terminat ion

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.

EL2126

3FN7046.4

May 2, 2007

Absolute Maximum Ratings Thermal Information

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

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

Any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . VS+ -0.3V to VS- +0.3V

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

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 = TA

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

Parameter Description Conditions Min Typ Max Unit

DC PERFORMANCE

VOS Input Offset Voltage (SO8) 0.2 2 mV

Input Offset Voltage (SOT23-5) 3mV

TCVOS Offset Voltage Temperature

Coefficient 17 µV/°C

IBInput Bias Current -10 -7 µA

IOS Input Bias Current Offset 0.06 0.6 µA

TCIB Input Bias Current Temperature

Coefficient 0.013 µA/°C

CIN Input Capacitance 2.2 pF

AVOL Open Loop Gain VO = -2.5V to +2.5V 80 87 dB

PSRR Power Supply Rejection Ratio

(Note 1) 80 100 dB

CMRR Common Mode Rejection Ratio at CMIR 75 106 dB

CMIR Common Mode Input Range -4.6 3.8 V

VOUTH Positive Output Voltage Swing No load, RF = 1kΩ3.8 3.8 V

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

VOUTH2 Positive Output Voltage Swing RL = 1 00Ω3.2 3.45 V

VOUTL2 Negative Output Voltage Swing RL = 100Ω-3.5 -3.2 V

IOUT Output Short Circuit Current

(Note 2) 80 100 mA

ISY Supply Current 4.7 5.5 mA

AC PERFORMANCE - RG = 20Ω, CL = 3pF

BW -3dB Bandwidth, RL = 500Ω100 MHz

BW ±0.1dB ±0.1dB Bandwidth, RL = 500Ω17 MHz

BW ±1dB ±1dB Bandwidth, RL = 500Ω80 MHz

Peaking Peaking, RL = 500Ω0.6 dB

SR Slew Rate VOUT = 2VP-P, measured at 20% to 80% 80 110 V/µs

OS Overshoot, 4VP-P Output Square

Wave Positive 2.8 %

Negative -7 %

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

EL2126

4FN7046.4

May 2, 2007

VNVoltage Noise Spectral Density 1.3 nV/√Hz

INCurrent 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, VOUT = 2VP-P, into 500Ω and 5pF load

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

Parameter Description Conditions Min Typ Max Unit

Electrical Specifications VS+ = +15V, VS- = -15V, TA = 25°C, RF = 180Ω, RG = 20Ω, RL = 500Ω unless otherwise speci fied.

Parameter Description Conditions Min Typ Max Unit

DC PERFORMANCE

VOS Input Offset Voltage (SO8) 0.5 3 mV

Input Offset Voltage (SOT23-5) 3mV

TCVOS Offset Voltage Temperature

Coefficient 4.5 µV/°C

IBInput Bias Current -10 -7 µA

IOS Input Bias Current Offset 0.12 0.7 µA

TCIB Input Bias Current Temperature

Coefficient 0.016 µA/°C

CIN Input Capacitance 2.2 pF

AVOL Open Loop Gain 80 90 dB

PSRR Power Supply Rejection Ratio

(Note 4) 65 80 dB

CMRR Common Mode Rejection Ratio at CMIR 70 85 dB

CMIR Common Mode Input Range -14.6 13.8 V

VOUTH Positive Output Voltage Swing No load, RF = 1kΩ13.6 13.7 V

VOUTL Negative Output Voltage Swing No load, RF = 1kΩ-13.8 -13.7 V

VOUTH2 Positive Output Voltage Swing RL = 100Ω, RF = 1kΩ10.2 11.2 V

VOUTL2 Negative Output Voltage Swing RL = 100Ω, RF = 1kΩ-10.3 -9.5 V

IOUT Output Short Circuit Current

(Note 5) 140 220 mA

ISY Supply Current 56mA

AC PERFORMANCE - RG = 20Ω, CL = 3pF

BW -3dB Bandwidth, RL = 500Ω135 MHz

BW ±0.1dB ±0.1dB Bandwidth, RL = 500Ω26 MHz

BW ±1dB ±1dB Bandwidth, RL = 500Ω60 MHz

Peaking Peaking, RL = 500Ω2.1 dB

SR Slew Rate (±2.5V Square Wave,

Measured 25%-75%) 130 150 V/µS

OS Overshoot, 4VP-P Output Square

Wave Positive 1.6 %

Negative -4.4 %

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

EL2126

5FN7046.4

May 2, 2007

VNVoltage Noise Spectral Density 1.4 nV/√Hz

INCurrent 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, VOUT = 2VP-P, into 500Ω and 5pF load

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

Parameter Description Conditions Min Typ Max Unit

Typical Performance Curves

FIGURE 1. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF FIGURE 2. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

FIGURE 3. INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF FIGURE 4. INVERTING FREQUENCY RESPONS E FOR

VARIOUS RF

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

RF = 1kΩ

RF = 500Ω

RF = 180Ω

RF = 100Ω

VS = ±5V

AV = 10

CL = 5pF

RL = 500Ω

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

RF = 1kΩ

RF = 500Ω

RF = 180Ω

RF = 100Ω

VS = ±15V

AV = 10

CL = 5pF

RL = 500Ω

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±5V

AV = -10

CL = 5pF

RL = 500Ω

RF = 1kΩ

RF = 350Ω

RF = 100Ω

RF = 200Ω

RF = 500Ω

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

AV = -10

CL = 5pF

RL = 500Ω

RF = 1kΩ

RF = 500Ω

RF = 200Ω

RF = 100Ω

RF = 350Ω

EL2126

6FN7046.4

May 2, 2007

FIGURE 5. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN FIGURE 6. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN

FIGURE 7. INVERTING FREQUENCY RESPONSE FOR

VARIOUS GAIN FIGURE 8. INVERTING FREQUENCY RESPONS E FOR

VARIOUS RF

FIGURE 9. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS OUTPUT SIGNAL LEVELS FIGURE 10. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS OUTPUT SIGNAL LEVELS

Typical Performance Curves (Continued)

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

AV = 10

VS = ±5V

RG = 20Ω

RL = 500Ω

CL = 5pF

AV = 2 0

AV = 50

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

RG = 20Ω

RL = 500Ω

CL = 5pF AV = 1 0

AV = 2 0

AV = 5 0

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±5V

CL = 5pF

RG = 35Ω

AV = -10

AV = -20

AV = -50

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

CL = 5pF

RG = 20Ω

AV = -1 0

AV = -2 0

AV = -5 0

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±5V

CL = 5pF

RL = 500Ω

RF = 180Ω

AV = 10

VO = 2.5VPP

VO = 5VPP

VO = 1VPP

VO = 30mVPP

VO = 500mVPP

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

CL = 5pF

RL = 500Ω

RF = 180Ω

AV = 10

VO = 5VPP

VO = 1VPP

VO = 2.5VPP

VO = 30mVPP

VO = 500mVPP

VO = 10VPP

EL2126

7FN7046.4

May 2, 2007

FIGURE 1 1. INVERTING FREQUENCY RESPONSE FOR

VARIOUS OUTPUT SIGNAL LEVELS FIGURE 12. INVERTING FREQUENCY RESPONS E FOR

VARIOUS OUTPUT SIGNAL LEVELS

FIGURE 13. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS CL FIGURE 14. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS CL

FIGURE 15. INVERTING FREQUENCY RESPONSE FOR

VARIOUS CL FIGURE 16. INVERTING FREQUENCY RESPONS E FOR

VARIOUS CL

Typical Performance Curves (Continued)

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±5V

CL = 5pF

RL = 500Ω

RF = 350Ω

AV = 10

VO = 3.4VPP

VO = 1VPP

VO = 2.5VPP

VO = 30mVPP

VO = 500mVPP

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

CL = 5pF

RL = 500Ω

RF = 200Ω

AV = 10

VO = 3.4VPP

VO = 1VPP

VO=2.5VP

VO = 30mVPP

VO = 500mVPP

VO = 2.5VPP

-2

-6

-10

1M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

CL = 28pF

CL = 16pFCL = 11pF

CL = 5pF

CL = 1 pF

VS = ±5V

RF = 150Ω

AV = 10

RL = 500Ω

-2

-6

-101M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±15V

RF = 180Ω

AV = 10

RL = 500Ω

CL = 28pF

CL = 16pF

CL = 11pF

CL = 5pF

CL = 1.2pF

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

VS = ±5V

RF = 350Ω

RL = 500Ω

AV = -10

CL = 28pF

CL = 16pF

CL = 11pF

CL = 5pF

CL = 1.2pF

-4

-8

-121M 10M 100M

FREQUENCY (Hz)

NORMALIZED GAIN (dB)

CL = 28pF

CL = 16pF

CL=11p

CL = 5 pF

CL = 1.2pF

VS = ±15V

RF = 200Ω

RL = 500Ω

AV = -10

CL = 11pF

EL2126