Datasheet EL2228CY-T7, EL2228CY-T13, EL2228CY, EL2228CS-T7, EL2228CS-T13 Datasheet (ELANT)

EL2228C - Preliminary

Dual Low Noise Amplifier

EL2228C - Preliminary

Features

• Voltage noise of only 4.9nV/√Hz

• Current noise of only 1.2pA/√Hz

• Bandwidth (-3dB) of 80MHz -
@AV = +1

• Gain-of-1 stable

• Just 4.5mA per amplifier

• 8-pin MSOP package

• ±2.5V to ±12V operation

Applications

• ADSL Filters

• HDSLII Filters

• Ultrasound input amplifiers

• Wideband Instrumentation

• Communications equipment

• Wideband sensors

Ordering Information

Part No. Temp. Range Package Outline #

EL2228CY 8-Pin MSOP - MDP0043

EL2228CY-T13 8-Pin MSOP 13” MDP0043

EL2228CY-T7 8-Pin MSOP 7” MDP0043

EL2228CS 8-Pin SO - MDP0027

EL2228CS-T13 8-Pin SO 13” MDP0027

EL2228CS-T7 8-Pin SO 7” MDP0027

General Description

The EL2228C is a dual, low-noise amplifier, ideally suited to filtering
applications in ADSL and HDSLII designs. It feature low noise speci-

fication of just 4.9nV/√Hz and 1.2pA/√Hz, making it ideal for

processing low voltage waveforms.

The EL2228C has a -3dB bandwidth of 80MHz and is gain-of-1 sta­ble. It also affords minimal power dissipation with a supply current of
just 4.5mA per amplifier. The amplifier can be powered from supplies
ranging from ±2.5V to ±12V.

The EL2228C is available in a space saving 8-Pin MSOP package as
well as the industry standard 8-Pin SO. It can operate over the -40°C to
+85°C temperature range.

Connection Diagram

1

VOUTA

2

VINA-

VINA+

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.

­+

3

4

VS-

EL2228C

8-Pin SO and 8-Pin MSOP

8

VS+

7

VOUTB

65-

VINB-

+

VINB+

September 25, 2001

EL2228C - Preliminary

Dual Low Noise Amplifier

Absolute Maximum Ratings (T

Values beyond absolute maximum ratings can cause the device to be pre­maturely damaged. Absolute maximum ratings are stress ratings only
and functional device operation is not implied.

Supply Voltage between VS+ and VS- +28V

EL2228C - Preliminary

Input Voltage VS- - 0.3V, VS +0.3V

Maximum Continuous Output Current 40mA

= 25°C)

A

Maximum Die Temperature +125°C

Storage Temperature -65°C to +150°C

Operating Temperature -40°C to +85°C

Lead Temperature 260°C

Power Dissipation See Curves

ESD Voltage 2kV

Important Note:

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

A

Electrical Characteristics

VS+= +12V, VS - = -12V, R

Parameter Description Condition Min Typ Max Unit

Input Characteristics

V

OS

TCV

I

B

R

IN

C

IN

Input Offset Voltage V

Average Offset Voltage Drift

OS

Input Bias Current V
Input Impedance 8 MΩ

Input Capacitance 1 pF

CMIR Common-Mode Input Range -11.8 +10.4 V

CMRR Common-Mode Rejection Ratio for VIN from -11.8V to +10.4V 60 90 dB

A

VOL

e

n

i

n

Open-Loop Gain -5V ≤ V
Voltage Noise f = 100kHz 4.9 nV/√Hz
Current Noise f = 100kHz 1.2 pA/√Hz

Output Characteristics

V

OL

V

OH

I

SC

Output Swing Low R

Output Swing High R

Short Circuit Current R

Power Supply Performance

PSRR Power Supply Rejection Ratio VS is moved from ±10.8V to ±13.2V 65 83 dB

I

S

Supply Current (Per Amplifier) No load 4 5 6 mA

Dynamic Performance

SR Slew Rate

t

S

Settling to +0.1% (AV = +1) (AV = +1), VO = 2V step 50 ns

BW -3dB Bandwidth 80 MHz

HD2 2nd Harmonic Distortion f = 1MHz, VO = 2V

HD3 3rd Harmonic Distortion f = 1MHz, VO = 2V

1. Measured over operating temperature range

2. Slew rate is measured on rising and falling edges

= 500Ω and C

L

[2]

= 3pF to 0V, R

L

= 420Ω & T

F

= 0V 0.2 3 mV

CM

[1]

= 0V -9 -4.5 -1 µA

CM

= 25°C unless otherwise specified.

A

-4 µV/°C

for VIN from -10V to +10V 60 75 dB

≤ 5V 60 75 dB

OUT

= 500Ω -10.3 -10 V

L

R

= 250Ω -9.5 -9 V

L

= 500Ω 10 10.3 V

L

R

= 250Ω 9.5 10 V

L

= 10Ω 140 180 mA

L

±2.5V square wave, measured 25%-75% 44 65 V/µs

, R

f = 1MHz, VO = 2V

f = 1MHz, VO = 2V

P-P

P-P

P-P

P-P

L

, R

L

, R

L

, R

L

= 500Ω, A
= 150Ω, A
= 500Ω, A
= 150Ω, A

= 2 -86 dBc

V

= 2 -79 dBc

V

= 2 -93 dBc

V

= 2 -70 dBc

V

2

EL2228C - Preliminary

Dual Low Noise Amplifier

Electrical Characteristics

VS+= +5V, VS - = -5V, R

Parameter Description Condition Min Typ Max Unit

Input Characteristics

V

OS

TCV

OS

I

B

R

IN

C

IN

CMIR Common-Mode Input Range -4.7 +3.4 V

CMRR Common-Mode Rejection Ratio for VIN from -4.7V to +3.4V 60 90 dB

A

VOL

e

n

i

n

Output Characteristics

V

OL

V

OH

I

SC

Power Supply Performance

PSRR Power Supply Rejection Ratio VS is moved from ±4.5V to ±5.5V 65 83 dB

I

S

Dynamic Performance

SR Slew Rate

t

S

BW -3dB Bandwidth 75 MHz

HD2 2nd Harmonic Distortion f = 1MHz, VO = 2V

HD3 3rd Harmonic Distortion f = 1MHz, VO = 2V

1. Measured over operating temperature range

2. Slew rate is measured on rising and falling edges

= 500Ω and C

L

Input Offset Voltage V

Average Offset Voltage Drift

Input Bias Current V

= 3pF to 0V, R

L

= 420Ω & T

F

CM

[1]

CM

= 25°C unless otherwise specified.

A

= 0V 0.6 3 mV

4.9 µV/°C

= 0V -9 -4.5 -1 µA

Input Impedance 6 MΩ

Input Capacitance 1.2 pF

for VIN from -2V to +2V dB

Open-Loop Gain -2.5V ≤ V

≤ 2.5V 60 72 dB

OUT

Voltage Noise f = 100kHz 4.7 nV/√Hz
Current Noise f = 100kHz 1.2 pA/√Hz

Output Swing Low R

Output Swing High R

Short Circuit Current R

= 500Ω -3.8 -3.5 V

L

R

= 250Ω -3.7 -3.5 V

L

= 500Ω 3.5 3.7 V

L

R

= 250Ω 3.5 3.6 V

L

= 10Ω 60 100 mA

L

Supply Current (Per Amplifier) No load 3.5 4.5 5.5 mA

[2]

±2.5V square wave, measured 25%-75% 35 50 V/µs

Settling to +0.1% (AV = +1) (AV = +1), VO = 2V step 50 ns

, R

f = 1MHz, VO = 2V

f = 1MHz, VO = 2V

P-P

P-P

P-P

P-P

= 500Ω, A

L

, R

= 150Ω, A

L

, R

= 500Ω, A

L

, R

= 150Ω, A

L

= 2 -90 dBc

V

= 2 -71 dBc

V

= 2 -99 dBc

V

= 2 -69 dBc

V

EL2228C - Preliminary

3

EL2228C - Preliminary

Dual Low Noise Amplifier

Typical Performance Curves

Non-inverting Frequency Response for Various R

EL2228C - Preliminary

4
3
2
1
0

-1

-2

-3

Normalized Gain (dB)

-4

VS=±12V
AV=+1

-5
RL=500Ω

-6

100k 1M

Non-inverting Frequency Response (Gain)

4

VS=±12V

3

RF=420Ω
RL=500Ω

2

AV=+1

1
0

-1

-2

-3

Normalized Gain (dB)

-4

-5

-6

100k 1M 10M

AV=10

RF=200Ω

RF=0Ω

Frequency (Hz)

AV=5

Frequency (Hz)

10M

AV=1

F

RF=1kΩ

RF=420Ω

100M

AV=2

100M

Inverting Frequency Response for Various R

4
3
2
1
0

-1

-2

-3

Normalized Gain (dB)

-4

-5

-6
1M 10M

Inverting Frequency Response (Gain)

4
3
2
1
0

-1

-2

-3

Normalized Gain (dB)

-4

-5

-6

100k 1M 10M

RF=100Ω RF=420Ω

RF=1kΩ

VS=±12V
AV=-1
RL=500Ω

VS=±12V
RF=420Ω

AV=-10

AV=-5

Frequency (Hz)

Frequency (Hz)

F

100M

AV=-1

AV=-2

100M

Non-inverting Frequency Response (Phase)

135

90
45

0

-45

-90

Phase (°)

-135

-180

-225

VS=±12V
RF=420Ω

-270
RL=500Ω

-315

100k 1M 10M

AV=5

AV=10

Frequency (Hz)

AV=1

AV=2

100M

Inverting Frequency Response (Phase)

135

90
45

0

-45

-90

Phase (°)

-135

-180

-225

VS=±12V
RF=420Ω

-270
RL=500Ω

-315

100k

AV=-1

AV=-2

AV=-5

AV=-10

10M1M 100M

Frequency (Hz)

4

Typical Performance Curves

EL2228C - Preliminary

EL2228C - Preliminary

Dual Low Noise Amplifier

Non-inverting Frequency Response for Various
Input Signal Levels

4

VS=±12V

3

RF=420Ω
RL=500Ω

2

AV=+1

1
0

-1

-2

-3

Normalized Gain (dB)

-4

-5

-6
100k 1M

Non-inverting Frequency Response for Various C

4
3
2
1
0

-1

-2

-3

Normalized Gain (dB)

VS=±12V
RF=420Ω

-4

RL=500Ω

-5

AV=+1

-6
100k 1M 10M

VIN=1V

PP

VIN=2V

PP

VIN=500mV

Frequency (Hz)

CL=3pF

Frequency (Hz)

PP

10M

CL=30pF

CL=10pF

VIN=100mV

100M

100M

Non-inverting Frequency Response for Various R

4
3
2
1

PP

L

0

-1

-2

-3

Normalized Gain (dB)

-4

VS=±12V
AV=+1

-5
RF=420Ω

-6

100k 1M

Non-inverting Frequency Response for Various
Output DC Levels

4
3
2
1
0

-1

-2

-3

Normalized Gain (dB)

VS=±12V
RF=420Ω

-4
RL=500Ω

-5

AV=+1

-6

100k 1M 10M

RL=50Ω

RL=150Ω

RL=500Ω

10M

Frequency (Hz)

VO=-10

VO=+5

VO=-5

Frequency (Hz)

VO=+10

L

RL=1kΩ

100M

VO=0

100M

-3dB Bandwidth vs ±Supply Voltage for Non­inverting Gains

80

G=1

60

40

-3dB Bandwidth (MHz)

20

0

2.5 4.5 8.5

G=2

G=5 G=10

6.5 10.5

Supply Voltage (±V)

VS=±12V
RF=420Ω
RL=500Ω
AV=+1

12.5

-3dB Bandwidth vs ±Supply Voltage for Inverting
Gains

25

VS=±12V

20

RF=420Ω
RL=500Ω
AV=+1

15

10

-3dB Bandwidth (MHz)
5

0

2.5
Supply Voltage (±V)

G=-1

G=-2

G=-5

G=-10

8.54.5 12.5

10.56.5

5

EL2228C - Preliminary

Dual Low Noise Amplifier

Typical Performance Curves

Peaking vs ±Supply Voltage for Non-inverting

EL2228C - Preliminary

Gains

1

0.8

0.6

0.4

Peaking (dB)

0.2

G=10

0

2.5 4.5

Small Signal Step Response
VS=±12V

20mV/div

G=1

G=2

8.56.5 10.5

Supply Voltage (±V)

VS=±12V
RF=420Ω
RL=500Ω
AV=+1

RF=420Ω
AV=1
RL=500Ω

12.5

Peaking vs ±Supply Voltage for Inverting Gains

0.2

0.16

0.12

0.08

Peaking (dB)

0.04

0

2.5 8.54.5 10.56.5 12.5

Small Signal Step Response
VS=±2.5V

20mV/div

G=-1

Supply Voltage (±V)

G=-10

RF=420Ω
AV=1
RL=500Ω

VS=±12V
RF=420Ω
RL=500Ω
AV=+1

G=-2

Large Signal Step Response
VS=±12V

0.5V/div

50ns/div

50ns/div

RF=420Ω
AV=1
RL=500Ω

50ns/div

Large Signal Step Response
VS=±2.5V

RF=420Ω
AV=1
RL=500Ω

0.5V/div

50ns/div

6

Typical Performance Curves

EL2228C - Preliminary

EL2228C - Preliminary

Dual Low Noise Amplifier

Group Delay vs Frequency

20
16
12

8
4
0

-4

Group Delay (ns)

-8

-12

-16

-20
1M

Supply Current vs Supply Voltage

13.2
12

10.8

9.6

8.4

7.2
6

4.8

Supply Current (mA)

3.6

2.4

1.2
0

0

VS=±12V
RF=420Ω
AV=1
RL=500Ω

AV=2

AV=1

Frequency (Hz)

5.6 11.22.8 8.4 12.64.2 9.81.4 7
VS (±V)

Differential Gain/Phase vs DC Input Voltage at

3.58MHz

0.2
VS=±12V
RF=420Ω

0.15
RL=150Ω

AV=2

0.1

0.05

0

dG (%) or dP (°)

-0.05

-0.1

100M10M

200M

14

-0.15

-1 -0.5 0
DC Input Voltage (V)

Closed Loop Output Impedance vs Frequency

100

10

1

Output Impedance (Ω)

0.1

0.01
10k

dP

dG

10.5

100M1M 10M100k

Frequency (Hz)

CMRR

100

80

60

40

-CMRR (dB)

20

VS=±12

0

10

100k 100M1k 1M10k 10M100

Frequency (Hz)

-10

-30

-50

-70

-90

PSRR

10

VS-

VS+

100M10k 100k 1M 10M1k

Frequency (Hz)

7

EL2228C - Preliminary

Dual Low Noise Amplifier

Typical Performance Curves

1MHz 2nd and 3rd Harmonic Distortion vs Output

EL2228C - Preliminary

Swing (VS=±12V)

-40

-50

-60

-70

Distortion (dB)

-80

-90

-100
0 8

Output Swing (VPP)

1MHz 2nd and 3rd Harmonic Distortion vs Output
Swing (single-ended)

-50

-60

-70

3rd HD

-80

-90

Distortion (dBc)

-100

-110

-120

2nd HD

Output Swing (VPP)

2ndH

3rdH

VS=±12V
AV=2
RF=420Ω

20124 16

204 8 12 160

1MHz 2nd and 3rd Harmonic Distortion vs Output
Swing (VS=±2.5V)

-50

-60

-70

-80

Distortion (dB)

-90

-100

-110
0 1 2.51.50.5 2

1MHz 2nd and 3rd Harmonic Distortion vs Output
Swing (single-ended)

-50
VS=±2.5V
AV=2

-60

RF=420Ω

-70

-80

Distortion (dBc)

-90

-100

-110

3rdH

Output Swing (VPP)

2nd D

UT

3rd D

Output Swing (VPP)

2ndH

UT

2.50.5 1 1.5 20

Voltage and Current Noise vs Frequency

18
16
14
12
10

8
6
4
2

Voltage Noise (nV√Hz), Current Noise

0

10 100 10k

E

N

I

N

Frequency (Hz)

Channel to Channel Isolation vs Frequency

0

-20

-40

Gain (dB)

-60

-80

1k

100k

-100
100k 1M 10M

Frequency (Hz)

A → B

B → C

100M

8

Typical Performance Curves

EL2228C - Preliminary

EL2228C - Preliminary

Dual Low Noise Amplifier

IS vs Tempertaure
VS=±12V

11

10

S

I

9

0

IB vs Temperature

-2

-4

(µA)

B

I

-6

-8

50

Temperature (mA)

Temperature (°C)

3dB Bandwidth vs Temperature
VS=±5V

100

90

80

70

Bandwidth (MHz)

60

1500 100-50

1500 50 100-50

50

VOS vs Temperature

2

1

0

(mV)

OS

V

-1

-2

Junction Temperature (°C)

10.1

Temperature (°C)

16010 60 110-40

1010.1

SR vs Temperature

76

74

72

70

68

SR (V/µs)

66

64

62

Temperature (°C)

Package Power Dissipation vs Ambient Temp.

JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board

0.7

0.6

625mW

0.5
486mW

0.4

0.3

0.2

Power Dissipation (W)

0.1

1500 50 100-50

0

MSOP8

206°C/W

SO8

160°C/W

10085

Ambient Temperature (°C)

15025 50 75 1250

9

EL2228C - Preliminary

Dual Low Noise Amplifier

Pin Descriptions

EL2228C - Preliminary

EL2228CY

8-Pin MSOP

EL2228CS 8-

Pin SO Pin Name Pin Function Equivalent Circuit

10

Applications Information

Product Description

EL2228C - Preliminary

EL2228C - Preliminary

Dual Low Noise Amplifier

11

EL2228C - Preliminary

Dual Low Noise Amplifier

EL2228C - Preliminary

General Disclaimer

Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir­cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described
herein and makes no representations that they are free from patent infringement.

WARNING - Life Support Policy

Elantec, Inc. products are not authorized for and should not be used
within Life Support Systems without the specific written consent of
Elantec, Inc. Life Support systems are equipment intended to sup-

Elantec Semiconductor, Inc.

675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: [phone]

(888) ELANTEC
Fax: [phone]
European Office: [phone]
Japan Technical Center: [phone]

port or sustain life and whose failure to perform when properly used
in accordance with instructions provided can be reasonably
expected to result in significant personal injury or death. Users con­templating application of Elantec, Inc. Products in Life Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elan­tec, Inc.’s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.

September 25, 2001

12

Printed in U.S.A.