intersil EL2227 DATA SHEET

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®

EL2227

Data Sheet May 1, 2007

Dual Very Low Noise Amplifier

The EL2227 is a dual, low-noise amplifier, ideally suited to
line receiving applications in ADSL and HDSLII designs.
With low noise specification of just 1.9nV/√Hz and

1.2pA/√Hz, the EL2227 is perfect for the detection of very
low amplitude signals.

The EL2227 features a -3dB bandwidth of 115MHz and is
gain-of-2 stable. The EL2227 also affords minimal power
dissipation with a supply current of just 4.8mA per amplifier.
The amplifier can be powered from supplies ranging from
±2.5V to ±12V.

The EL2227 is available in a space-saving 8 Ld MSOP
package as well as the industry-standard 8 Ld SOIC. It can
operate over the -40°C to +85°C temperature range.

Pinout

EL2227

(8 LD SOIC, 8 LD MSOP)

TOP VIEW

VOUTA

VINA-

VINA+

VS

1

2

-

+

3

-

4

8

VS+

7

VOUTB

VINB-

6

-

+

VINB+

5

FN7058.3

Features

• Voltage noise of only 1.9nV/√Hz

• Current noise of only 1.2pA/√Hz

• Bandwidth (-3dB) of 115MHz @AV = +2

• Gain-of-2 stable

• Just 4.8mA per amplifier

• 8 Ld MSOP package

• ±2.5V to ±12V operation

• Pb-free plus anneal available (RoHS compliant)

Applications

• ADSL receivers

• HDSLII receivers

• Ultrasound input amplifiers

• Wideband instrumentation

• Communications equipment

• AGC and PLL active filters

• Wideband sensors

Ordering Information

.

PART NUMBER

EL2227CY L -40 to +85 - 8 Ld MSOP (3.0mm) MDP0043
EL2227CY-T13 L -40 to +85 13” 8 Ld MSOP (3.0mm) MDP0043
EL2227CY-T7 L -40 to +85 7” 8 Ld MSOP (3.0mm) MDP0043
EL2227CYZ (Note) BASAA -40 to +85 - 8 Ld MSOP (3.0mm) (Pb-free) MDP0043
EL2227CYZ-T13 (Note) BASAA -40 to +85 13” 8 Ld MSOP (3.0mm) (Pb-free) MDP0043
EL2227CYZ-T7 (Note) BASAA -40 to +85 7” 8 Ld MSOP (3.0mm) (Pb-free) MDP0043
EL2227CS 2227CS -40 to +85 - 8 Ld SOIC (150 mil) MDP0027
EL2227CS-T13 2227CS -40 to +85 13” 8 Ld SOIC (150 mil) MDP0027
EL2227CS-T7 2227CS -40 to +85 7” 8 Ld SOIC (150 mil) MDP0027
EL2227CSZ (Note) 2227CSZ -40 to +85 - 8 Ld SOIC (150 mil) (Pb-free) MDP0027
EL2227CSZ-T13 (Note) 2227CSZ -40 to +85 13” 8 Ld SOIC (150 mil) (Pb-free) MDP0027
EL2227CSZ-T7 (Note) 2227CSZ -40 to +85 7” 8 Ld SOIC (150 mil) (Pb-free) MDP0027

NOTE: Intersil Pb-free plus anneal 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

1

TEMP RANGE

(°C) TAPE AND REEL PACKAGE PKG. DWG.#

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. 2004, 2005, 2007. All Rights Reserved

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

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EL2227

Absolute Maximum Ratings Thermal Information

Supply Voltage between VS+ and VS-. . . . . . . . . . . . . . . . . . . . .28V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . V

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

- - 0.3V, VS +0.3V

S

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

ESD Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV

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: T

= TC = T

J

A

Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C

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

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

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

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

Electrical Specifications V

+ = +12V, VS- = -12V, RL = 500Ω and CL = 3pF to 0V, RF = RG = 620Ω, and TA = +25°C Unless Otherwise

S

Specified.

PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT

INPUT CHARACTERISTICS

V

OS

TCV
I

B

R

IN

C

IN

OS

Input Offset Voltage V

= 0V -0.2 3 mV

CM

Average Offset Voltage Drift -0.6 µV/°C
Input Bias Current V

= 0V -9 -3.4 µA

CM

Input Impedance 7.3 MΩ

Input Capacitance 1.6 pF
CMIR Common-Mode Input Range -11.8 +10.4 V
CMRR Common- Mode Rejection Ratio for V
A
e
i

VOL

N

N

Open-Loop Gain -5V ≤ V

Voltage Noise f = 100kHz 1.9 nV/√Hz

Current Noise f = 100kHz 1.2 pA/√Hz

from -11.8V to 10.4V 60 94 dB

IN

≤ 5V 70 87 dB

OUT

OUTPUT CHARACTERISTICS

V

OL

V

OH

I

SC

Output Swing Low RL = 500Ω -10.4 -10 V

R

= 250Ω -9.8 -9 V

L

Output Swing High RL = 500Ω 10 10.4 V

= 250Ω 9.5 10 V

R

L

Short Circuit Current RL = 10Ω 140 180 mA

POWER SUPPLY PERFORMANCE

PSRR Power Supply Rejection Ratio V
I

S

V

S

Supply Current (Per Amplifier) No Load 4.8 6.5 mA

Operating Range ±2.5 ±12 V

is moved from ±2.25V to ±12V 65 95 dB

S

DYNAMIC PERFORMANCE

SR Slew Rate (Note 2) ±2.5V square wave, measured 25% to 75% 40 50 V/µS
t

S

BW -3dB Bandwidth R
HD2 2nd Harmonic Distortion f = 1MHz, V

HD3 3rd Harmonic Distortion f = 1MHz, V

Settling to 0.1% (AV = +2) (AV = +2), V

= 358Ω 115 MHz

F

f = 1MHz, V

f = 1MHz, V

±1V 65 ns

O =

= 2V

O

= 2V

O

= 2V

O

= 2V

O

, RL = 500Ω, RF = 358Ω 93 dBc

P-P

, RL = 150Ω, RF = 358Ω 83 dBc

P-P

, RL = 500Ω, RF = 358Ω 94 dBc

P-P

, RL = 150Ω, RF = 358Ω 76 dBc

P-P

2

FN7058.3

May 1, 2007

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EL2227

Electrical Specifications V

PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT

INPUT CHARACTERISTICS

V

OS

TCV

OS

I

B

R

IN

C

IN

CMIR Common-Mode Input Range -4.8 3.4 V
CMRR Common-Mode Rejection Ratio for V
A

VOL

e

N

i

N

OUTPUT CHARACTERISTICS

V

OL

V

OH

I

SC

POWER SUPPLY PERFORMANCE

PSRR Power Supply Rejection Ratio V
I

S

V

S

DYNAMIC PERFORMANCE

SR Slew Rate ±2.5V square wave, measured 25%-75% 35 45 V/µS
t

S

BW -3dB Bandwidth R
HD2 2nd Harmonic Distortion f = 1MHz, V

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

Input Offset Voltage V
Average Offset Voltage Drift -0.6 µV/°C
Input Bias Current V
Input Impedance 7.3 MΩ
Input Capacitance 1.6 pF

Open-Loop Gain -5V ≤ V
Voltage Noise f = 100kHz 1.9 nV/√Hz
Current Noise f = 100kHz 1.2 pA/√Hz

Output Swing Low RL = 500Ω -3.8 -3.5 V

Output Swing High RL = 500Ω 3.5 3.7 V

Short Circuit Current RL = 10Ω 60 100 mA

Supply Current (Per Amplifier) No Load 4.5 5.5 mA
Operating Range ±2.5 ±12 V

Settling to 0.1% (AV = +2) (AV = +2), V

+ = +12V, VS- = -12V, RL = 500Ω and CL = 3pF to 0V, RF = RG = 620Ω, and TA = +25°C Unless Otherwise

S

Specified.

= 0V 0.2 3 mV

CM

= 0V -9 -3.7 µA

CM

from -4.8V to 3.4V 60 97 dB

IN

≤ 5V 70 84 dB

OUT

= 250Ω -3.7 -3.5 V

R

L

RL = 250Ω 3.5 3.6 V

is moved from ±2.25V to ±12V 65 95 dB

S

±1V 77 ns

O =

= 358Ω 90 MHz

F

= 2V

, RL = 500Ω, RF = 358Ω 98 dBc

P-P

= 2V

, RL = 150Ω, RF = 358Ω 90 dBc

P-P

, RL = 500Ω, RF = 358Ω 94 dBc

P-P

= 2V

, RL = 150Ω, RF = 358Ω 79 dBc

P-P

f = 1MHz, V

f = 1MHz, V

O
O

O

3

FN7058.3

May 1, 2007

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Typical Performance Curves

4

3

2

1

0

-1

-2

-3

VS = ±12V

-4

NORMALIZED GAIN (dB)

AV = +2

-5

RL = 500Ω

-6
1M 10M 100M

RF = 1kΩ

RF = 100Ω

R

FREQUENCY (Hz)

FIGURE 1. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS RF

= 350Ω

F

RF = 620Ω

200M

EL2227

4

3

2

1

0

-1

-2

-3

-4

NORMALIZED GAIN (dB)

VS = ±12V
AV = -1

-5
RL = 500Ω

-6

1M 10M 10 0M

RF = 100Ω

RF = 350Ω

RF = 420Ω

RF = 620Ω

RF = 1kΩ

200M

FREQUENCY (Hz)

FIGURE 2. INVERTING FREQUENCY RESPONSE FOR

VARIOUS R

F

4

3

2

1

0

-1

-2

-3

-4

NORMALIZED GAIN (dB)

VS = ±12V
RF = 350Ω

-5
RL = 500Ω

-6

1M 10M 100M

FREQUENCY (Hz)

AV = 2

AV = 5AV = 10

200M

FIGURE 3. NON-INVERTING FREQUENCY RESPONSE

(GAIN)

135

90

45

0

-45

-90

-135

PHASE (°)

-180

-225

VS = ±12

= 350Ω

R

F

-270
RL = 500Ω

-315

1M 10M

AV = 5

AV = 2

AV = 10

100M 200M

FREQUENCY (Hz)

FIGURE 5. NON-INVERTING FREQUENCY RESPONSE

(PHASE)

4

3

2

1

0

-1

AV = -10

-2

-3

-4

NORMALIZED GAIN (dB)

VS = ±12V
RF = 420Ω

-5
RL = 500Ω

-6

1M 10M 10 0M

AV = -2 AV = -1

AV = -5

200M

FREQUENCY (Hz)

FIGURE 4. INVERTING FREQUENCY RESPONSE (GAIN)

135

90

45

0

-45

-90

-135

PHASE (°)

-180

VS = ±12V

-225
RF = 420Ω

-270
R

L

-315

1M 10M 10 0M

AV = -10

= 500Ω

AV = -1

AV = -2

AV = -5

200M

FREQUENCY (Hz)

FIGURE 6. INVERTING FREQUENCY RESPONSE (PHASE)

4

FN7058.3

May 1, 2007

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Typical Performance Curves (Continued)

EL2227

4

VS = ±12V

3

RF = 350Ω
AV = +2

2

RL = 500Ω

1

0

-1

-2

-3

-4

NORMALIZED GAIN (dB)

-5

-6
100k 1M 10M

V

V

= 500mV

IN

V

= 1V

IN

V

= 2V

IN

FREQUENCY (Hz)

IN

= 100mV

PP

PP

PP

V

= 20mV

IN

PP

PP

100M

FIGURE 7. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS INPUT SIGNAL LEVELS

5

4

3

2

1

0

-1

-2
VS=±12

VS = ±12V

V

RF = 620Ω

-3

NORMALIZED GAIN (dB)

RF=620

RL = 500Ω

-4

Ω

AV = +2

-5

1M 10M 100M

CL = 30pF

CL = 12pF

CL = 2pF

200M

FREQUENCY (Hz)

FIGURE 9. NON-INVERTING FREQUENCY RESPONSE FOR

VARIOUS CL

4

3

2

1

0

-1

-2

-3

-4

NORMALIZED GAIN (dB)

-5

-6
1M 10M 10 0M

V

= 2.8V

IN

VS ±12V
RF = 420Ω
RL = 500Ω
AV = -1

V

= 1.4V

IN

PP

FREQUENCY (Hz)

PP

V

IN

V

= 20mV

IN

= 280mV

PP

PP

200M

FIGURE 8. INVERTING FREQUENCY RESPONSE FOR

VARIOUS INPUT SIGNAL LEVELS

4

3

2

1

0

-1

-2

-3

VS ± 12V
R F= 420Ω

-4

NORMALIZED GAIN (dB)

RL = 500Ω

-5

AV = -1

-6
1M 10M 10 0M

CL = 30pF

CL = 12pF

CL = 2pF

200M

FREQUENCY (Hz)

FIGURE 10. INVERTING FREQUENCY RESPONSE FOR

VARIOUS CL

4

3

2

1

0

-1

-2

-3
VS = ±12V

NorMalized GAIN (dB)

R

= 620Ω

-4

F

= 15pF

C

L

-5
AV = +2

-6

1M 10M 100M

FIGURE 11. NON-INVERTING FREQUENCY RESPONSE FOR

RL = 100Ω RL = 500Ω

RL = 50Ω

FREQUENCY (Hz)

200M

-1

-2

-3

-4

NORMALIZED GAIN (dB)

-5

-6

FIGURE 12. FREQUENCY RESPONSE FOR VARIOUS OUTPUT

VARIOUS RL

5

4

3

2

1

0

VS = ±12V
RF = 620Ω
R

= 500Ω

L

= +2

A

V

100k 1M 10M

VO = +10V

VO = -10V

FREQUENCY (Hz)

DC LEVELS

VO = 0V

VO = -5V

VO = +5V

100M

FN7058.3

May 1, 2007

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Typical Performance Curves (Continued)

EL2227

140

AV = +2
RF = 620Ω

120

RL = 500Ω

100

80

60

40

AV = +5 AV = -5

3dB BANDWIDTH (MHz)

20

0

24 8

AV = -1

AV = +2

SUPPLY VOLTAGE (±V)

A V= -2

AV = +10

AV = -10

12610

4

AV = +2

3.5

3

AV = -1

2.5

2

AV = +10

1.5

PEAKING (dB)

AV = -10

1

0.5

0

24 8

AV = +5

AV = -5

SUPPLY VOLTAGE (±V)

AV = +2
RF = 620Ω
RL = 500Ω

AV = -2

FIGURE 13. 3dB BANDWIDTH vs SUPPLY VOLTAGE FIGURE 14. PEAKING vs SUPPLY VOLTAGE

0.5V/DIV

RF = 620Ω
AV = 2
RL = 500Ω

0.5V/DIV

RF = 620Ω
AV = 2
RL = 500Ω

12610

100ns/DIV

FIGURE 15. LARGE SIGNAL STEP RESPONSE (VS = ±12V)

RF = 620Ω
AV = 2
RL = 500Ω

20mV/DIV

100ns/DIV

FIGURE 17. SMALL SIGNAL STEP RESPONSE (VS = ±12V)

100ns/DIV

FIGURE 16. LARGE SIGNAL STEP RESPONSE (VS = ±2.5V)

RF = 620Ω
AV = 2
RL = 500Ω

20mV/DIV

100ns/DIV

FIGURE 18. SMALL SIGNAL STEP RESPONSE (VS = ±2.5V)

6

FN7058.3

May 1, 2007

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Typical Performance Curves (Continued)

EL2227

10

8

6

4

2

0

-2

-4

GROUP DELAY (ns)

-6

-8

-10
1M 10M

AV = 5V

AV = 2V

FREQUENCY (Hz)

VS = ±12V
RF = 620Ω
RL = 500Ω
P

= -20dBm into 50Ω

IN

100M

0.1

0.08

0.06

dP

0

-1 0

dG (%) OR dP (°)

0.04

0.02

-0.02

AV = 2
R
R
fO = 3.58MHz

dG

-0.5 0.5

DC INPUT VOLTAGE (V)

= 620Ω

F

= 150Ω

L

1

FIGURE 19. GROUP DELAY vs FREQUENCY FIGURE 20. DIFFERENTIAL GAIN/PHASE vs DC INPUT

VOLTAGE AT 3.58MHz

12

1.2/DIV

6

100

10

1

SUPPLY CURRENT (mA)

1.2/DIV

0

SUPPLY VOLTAGE (±V)

6120

FIGURE 21. SUPPLY CURRENT vs SUPPLY VOLTAGE

110

90

70

50

-CMRR (dB)

30

VS = ±12

10

10 10k

FREQUENCY (Hz)

1M 100M100 1k 100k 10M

FIGURE 23. CMRR

0.1

OUTPUT IMPEDANCE (Ω)

0.01
10k 1M

100k 10M

FREQUENCY (Hz)

100M

FIGURE 22. CLOSED LOOP OUTPUT IMPEDANCE vs

FREQUENCY

0

20

40

60

PSRR (dB)

80

100

1k 1M

VS-

100k

FREQUENCY (Hz)

VS+

10M 100M10k

FIGURE 24. PSRR

7

FN7058.3

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Typical Performance Curves (Continued)

EL2227

-40
AV = 2
RF = 620Ω

-50
RL = 500Ω

-60

-70

-80

DISTORTION (dBc)

-90

-100
08

2nd H

3rd H

16 204 12

OUTPUT SWING (VPP)

FIGURE 25. 1MHz 2nd and 3rd HARMONIC DISTORTION vs

OUTPUT SWING FOR VS = ±12V

-60

-70

-80

-90

THD (dBc)

-100

-110

-120
1

RL = 50

RL = 500

100010 100

FREQUENCY (kHz)

FIGURE 27. TOTAL HARMONIC DISTORTION vs FREQUENCY

VS = ±12V

@ 2V

PP

-50
AV = 2
RF = 358Ω
RL = 500Ω

-60

-70

-80

DISTORTION (dBc)

-90

-100

01.5

OUTPUT SWING (VPP)

2nd H

3rd H

2.50.5 21

FIGURE 26. 1MHz 2nd and 3rd HARMONIC DISTORTION vs

OUTPUT SWING FOR VS = ±2.5V

-60

-70

-80

-90

THD (dBc)

-100

-110

-120
1100010 100

RL = 50

RL = 500

FREQUENCY (kHz)

FIGURE 28. TOTAL HARMONIC DISTORTION vs FREQUENCY

VS = ±2.5V

@ 2V

PP

10

9

8

7

I

N

6

5

4

NOISE (pA/√Hz)

3

2

VOLTAGE NOISE (nV/√Hz), CURRENT

1

10 1k

E

N

FREQUENCY (Hz)

10k 100k100

FIGURE 29. VOLTAGE AND CURRENT NOISE vs FREQUENCY

FIGURE 30. CHANNEL TO CHANNEL ISOLATION vs

-20

-40

-60

GAIN (dB)

-80

-100

8

0

100k 1M

FREQUENCY

FREQUENCY (Hz)

A → B

B → A

100M10M

FN7058.3

May 1, 2007

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Typical Performance Curves (Continued)

EL2227

150

140

130

120

110

100

-3dB BANDWIDTH (MHz)
90

80

-20-40 20 80 14060 120

40

0100

DIE TEMPERATURE (°C)

10

9.5

(mA)

S

I

9

8.5

-50 50

100 1500

DIE TEMPERATURE (°C)

FIGURE 31. -3dB BANDWIDTH vs TEMPERATURE FIGURE 32. SUPPLY CURRENT vs TEMPERATURE

(µA)

BIAS

I

-2

-3

-4

-5

2

0

(mV)

OS

V

-2

-4

-50 0

DIE TEMPERATURE (°C)

FIGURE 33. V

55

53

51

49

SLEW RATE (V/µs)

47

45

-50

vs TEMPERATURE

OS

50 1500100

DIE TEMPERATURE (°C)

FIGURE 35. SLEW RATE vs TEMPERATURE

-6

15050 100

-50 50

DIE TEMPERATURE (°C)

100 1500

FIGURE 34. INPUT BIAS CURRENT vs TEMPERATURE

160

SETTLING TIME (ns)

140

120

100

80

60

40

20

0

0.01

VS = ±2.5V
V

O

VS = ±12V

VO = 2V

= 2V

PP

PP

ACCURACY (%)

VS = ±12V

= 5V

V

O

PP

10.1

FIGURE 36. SETTLING TIME vs ACCURACY

9

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Typical Performance Curves (Continued)

JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD

0.9
781mW

0.8

0.7
607mW

0.6

0.5

0.4

0.3

0.2

POWER DISSIPATION (W)

0.1

0

0100

FIGURE 37. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE

Pin Descriptions

EL2227

S

θ

O

J

8

A

=

+

1

6

0

°

C

/

M

S

O

θ

P

J

8

A

=

+

20

6

°C

/

W

AMBIENT TEMPERATURE (°C)

W

85

15025 1257550

EL2227CY

8-PIN MSOP

EL2227CS

8-PIN SO PIN NAME

PIN

FUNCTION EQUIVALENT CIRCUIT

1 1 VOUTA Output

2 2 VINA- Input

3 3 VINA+ Input Reference Circuit 2

4 4 VS- Supply

5 5 VINB+ Input

6 6 VINB- Input Reference Circuit 2

7 7 VOUTB Output Reference Circuit 1

8 8 VS+ Supply

VS+

Circuit 1

V

S

-

V

S

Circuit 2

V

OUT

+

VIN-VIN+

10

FN7058.3

May 1, 2007

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P

)

EL2227

Applications Information

Product Description

The EL2227 is a dual voltage feedback operational amplifier
designed especially for DMT ADSL and other applications
requiring very low voltage and current noise. It also features
low distortion while drawing moderately low supply current
and is built on Elantec's proprietary high-speed
complementary bipolar process. The EL2227 use a classical
voltage-feedback topology which allows them to be used in a
variety of applications where current-feedback amplifiers are
not appropriate because of restrictions placed upon the
feedback element used with the amplifier. The conventional
topology of the EL2227 allows, for example, a capacitor to
be placed in the feedback path, making it an excellent choice
for applications such as active filters, sample-and-holds, or
integrators.

ADSL CPE Applications

The low noise EL2227 amplifier is specifically designed for
the dual differential receiver amplifier function with ADSL
transceiver hybrids as well as other low-noise amplifier
applications. A typical ADSL CPE line interface circuit is
shown in Figure 38. The EL2227 is used in receiving DMT
down stream signal. With careful transceiver hybrid design
and the EL2227 1.9nV/√Hz voltage noise and 1.2pA/√Hz
current noise performance, -140dBm/Hz system background
noise performance can be easily achieved.

R

DRIVER

INPUT

RECEIVE

OUT +

AMPLIFIERS

RECEIVE

OUT -

FIGURE 38. TYPICAL LINE INTERFACE CONNECTION

R

G

RECEIVE

+

-

R

F

R

F

-

+

RFR

-

+
+

-

R

F

OUT

R

R

IN

R

R

IN

Disable Function

The EL2227 is in the standard dual amplifier package
without the enable/disable function. A simple way to
implement the enable/disable function is depicted below.
When disabled, both the positive and negative supply
voltages are disconnected (see Figure 39)

OUT

LINE +

LINE -

Z

LINE

+12V

1k

10k

10k

1k

+

-

1k

75k

FIGURE 39.

1µF

1µF 4.7µF

Power Dissipation

With the wide power supply range and large output drive
capability of the EL2227, it is possible to exceed the +150°C
maximum junction temperatures under certain load and
power-supply conditions. It is therefore important to calculate
the maximum junction temperature (T
applications to determine if power supply voltages, load
conditions, or package type need to be modified for the
EL2227 to remain in the safe operating area. These
parameters are related as follows:

T

JMAXTMAXθJA

PD

×()+=

MAXTOTAL

where:

PD

MAXTOTAL

is the sum of the maximum power

dissipation of each amplifier in the package (PD
PD

for each amplifier can be calculated as follows:

MAX

D

MAX

2VSI

( V

SMAXVS

OUTMAX

where:

= Maximum Ambient Temperature

T

MAX

θJA = Thermal Resistance of the Package

PD

= Maximum Power Dissipation of 1 Amplifier

MAX

VS = Supply Voltage
I

= Maximum Supply Current of 1 Amplifier

MAX

V

OUTMAX

= Maximum Output Voltage Swing of the

Application
R

= Load Resistance

L

To serve as a guide for the user, we can calculate maximum
allowable supply voltages for the example of the video
cable-driver below since we know that T
T

MAX

= +75°C, I

= 9.5mA, and the package θJAs are

SMAX

shown in Table 1. If we assume (for this example) that we
are driving a back-terminated video cable, then the

JMAX

JMAX

) for all

V

OUTMAX

----------------------------

)

×–+××=

= +150°C,

R

MAX

L

(EQ. 1)

)

(EQ. 2

11

FN7058.3

May 1, 2007

www.BDTIC.com/Intersil

EL2227

maximum average value (over duty-cycle) of V

1.4V, and R

PART PACKAGE

EL2227CS SO8 160°C/W 0.406W @ +85°C
EL2227CY MSOP8 206°C/W 0.315W @ +85°C

= 150Ω, giving the results seen in Table 1.

L

TABLE 1.

MAX PD

θ

JA

T

MAX

OUTMAX

@

ISS

is

MAX V

Single-Supply Operation

The EL2227 have been designed to have a wide input and
output voltage range. This design also makes the EL2227 an
excellent choice for single-supply operation. Using a single
positive supply, the lower input voltage range is within
200mV of ground (R
range is within 875mV of ground. Upper input voltage range
reaches 3.6V, and output voltage range reaches 3.8V with a
5V supply and R
swing on a single 5V supply. This wide output voltage range
also allows single-supply operation with a supply voltage as
high as 28V.

= 500Ω), and the lower output voltage

L

= 500Ω. This results in a 2.625V output

L

Gain-Bandwidth Product and the -3dB Bandwidth

The EL2227 have a gain-bandwidth product of 137MHz
while using only 5mA of supply current per amplifier. For
gains greater than 2, their closed-loop -3dB bandwidth is
approximately equal to the gain-bandwidth product divided
by the noise gain of the circuit. For gains less than 2, higher­order poles in the amplifiers' transfer function contribute to
even higher closed loop bandwidths. For example, the
EL2227 have a -3dB bandwidth of 115MHz at a gain of +2,
dropping to 28MHz at a gain of +5. It is important to note that
the EL2227 have been designed so that this “extra”
bandwidth in low-gain applications does not come at the
expense of stability. As seen in the typical performance
curves, the EL2227 in a gain of +2 only exhibit 0.5dB of
peaking with a 1000Ω load.

Printed-Circuit Layout

The EL2227 are well behaved, and easy to apply in most
applications. However, a few simple techniques will help
assure rapid, high quality results. As with any high-frequency

S

device, good PCB layout is necessary for optimum
performance. Ground-plane construction is highly
recommended, as is good power supply bypassing. A 0.1µF
ceramic capacitor is recommended for bypassing both
supplies. Lead lengths should be as short as possible, and
bypass capacitors should be as close to the device pins as
possible. For good AC performance, parasitic capacitances
should be kept to a minimum at both inputs and at the
output. Resistor values should be kept under 5kW because
of the RC time constants associated with the parasitic
capacitance. Metal-film and carbon resistors are both
acceptable, use of wire-wound resistors is not recommended
because of their parasitic inductance. Similarly, capacitors
should be low-inductance for best performance.

Output Drive Capability

The EL2227 have been designed to drive low impedance
loads. They can easily drive 6V
high output drive capability makes the EL2227 an ideal
choice for RF, IF and video applications.

into a 500Ω load. This

P-P

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www.BDTIC.com/Intersil

Small Outline Package Family (SO)

A

D

NN

(N/2)+1

EL2227

h X 45°

PIN #1

E

C

SEATING
PLANE

0.004 C

E1

B

0.010 BM CA

I.D. MARK

1

e

0.010 BM CA

(N/2)

c

SEE DETAIL “X”

L1

H

A2

GAUGE
PLANE

A1

b

DETAIL X

L

4° ±4°

MDP0027

SMALL OUTLINE PACKAGE FAMILY (SO)

INCHES

SO16

SYMBOL

A 0.068 0.068 0.068 0.104 0.104 0.104 0.104 MAX -
A1 0.006 0.006 0.006 0.007 0.007 0.007 0.007 ±0.003 -
A2 0.057 0.057 0.057 0.092 0.092 0.092 0.092 ±0.002 -

b 0.017 0.017 0.017 0.017 0.017 0.017 0.017 ±0.003 -

c 0.009 0.009 0.009 0.011 0.011 0.011 0.011 ±0.001 -
D 0.193 0.341 0.390 0.406 0.504 0.606 0.704 ±0.004 1, 3
E 0.236 0.236 0.236 0.406 0.406 0.406 0.406 ±0.008 -

E1 0.154 0.154 0.154 0.295 0.295 0.295 0.295 ±0.004 2, 3

e 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Basic ­L 0.025 0.025 0.025 0.030 0.030 0.030 0.030 ±0.009 -

L1 0.041 0.041 0.041 0.056 0.056 0.056 0.056 Basic -

h 0.013 0.013 0.013 0.020 0.020 0.020 0.020 Reference -
N 8 14 16 16 20 24 28 Reference -

NOTES:

1. Plastic or metal protrusions of 0.006” maximum per side are not included.

2. Plastic interlead protrusions of 0.010” maximum per side are not included.

3. Dimensions “D” and “E1” are measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994

(0.150”)

SO16 (0.300”)

(SOL-16)

SO20

(SOL-20)

SO24

(SOL-24)

SO28

(SOL-28)

TOLERANCE NOTESSO-8 SO-14

A

0.010

Rev. M 2/07

13

FN7058.3

May 1, 2007

www.BDTIC.com/Intersil

Mini SO Package Family (MSOP)

M

C

SEATING
PLANE

0.10 C

N LEADS

c

0.25 C A B

E1E

B

e

L1

SEE DETAIL "X"

D

N

1

b

A

(N/2)+1

PIN #1
I.D.

(N/2)

H

M

0.08 C A B

A

EL2227

MDP0043

MINI SO PACKAGE FAMILY

SYMBOL

A1.101.10 Max. ­A1 0.10 0.10 ±0.05 ­A2 0.86 0.86 ±0.09 -

b 0.33 0.23 +0.07/-0.08 -

c0.180.18 ±0.05 ­D 3.00 3.00 ±0.10 1, 3
E4.904.90 ±0.15 -

E1 3.00 3.00 ±0.10 2, 3

e0.650.50 Basic -

L0.550.55 ±0.15 -

L1 0.95 0.95 Basic -

N 8 10 Reference -

NOTES:

1. Plastic or metal protrusions of 0.15mm maximum per side are not
included.

2. Plastic interlead protrusions of 0.25mm maximum per side are
not included.

3. Dimensions “D” and “E1” are measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994.

MILLIMETERS

TOLERANCE NOTESMSOP8 MSOP10

Rev. D 2/07

A2

GAUGE

A1

L

DETAIL X

PLANE

3° ±3°

0.25

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implic atio n or other wise u nde r any p a tent or patent rights of Intersil or it s sub sidi ari es.

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14

FN7058.3

May 1, 2007