intersil EL1519 DATA SHEET

®

EL1519

Data Sheet April 10, 2007

Medium Power Differential Line Driver

The EL1519 is a dual operational amplifier designed for
customer premise line driving in DMT ADSL solutions. This
device features a high drive capability of 250mA while
consuming only 7.1mA of supply current per amplifier and
operating from a single 5V to 12V supply. This driver
achieves a typical distortion of less than -85dBc, at 150kHz
into a 25Ω load. The EL1519 is available in the industry
standard 8 Ld SO. This device is optimized to use low
feedback resistor values to minimize noise in ADSL
systems.

The EL1519 is ideal for ADSL, SDSL, HDSL2 and VDSL line
driving applications.

Ordering Information

PART

PART NUMBER

EL1519CS 1519CS - 8 Ld SO MDP0027
EL1519CS-T7 1519CS 7" 8 Ld SO MDP0027
EL1519CS-T13 1519CS 13" 8 Ld SO MDP0027
EL1519CSZ

(See Note)
EL1519CSZ-T7

(See Note)
EL1519CSZ-T13

(See Note)

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.

MARKING

1519CSZ - 8 Ld SO

1519CSZ 7" 8 Ld SO

1519CSZ 13" 8 Ld SO

TAPE &

REEL PACKAGE

(Pb-Free)

(Pb-Free)

(Pb-Free)

PKG.

DWG. #

MDP0027

MDP0027

MDP0027

FN7017.2

Features

• Drives up to 250mA from a +12V supply

•20V

differential output drive into 100Ω

P-P

• -85dBc typical driver output distortion at full output at
150kHz

• Low quiescent current of 7.5mA per amplifier

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• ADSL G.lite CO line driving

• ADSL full rate CPE line driving

• G.SHDSL, HDSL2 line driver

• Video distribution amplifier

• Video twisted-pair line driver

Pinout

EL1519

(8 LD SO)

TOP VIEW

VSOUTA

8

OUTB

7

INB-

6

-

+

INB+

5

INA-

INA+

GND

1

-

2

+

3

4

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. 2004, 2007. All Rights Reserved.

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

EL1519

Absolute Maximum Ratings (T

VS+ Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . -0.3V to +14.6V

V

+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to VS+

IN

Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA

Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA

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

Electrical Specifications V

= +25°C) Thermal Information

A

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

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

Operating Junction Temperature . . . . . . . . . . . . . . .-40°C to +150°C

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

A

= ±12V, RF = 750Ω, RL = 100Ω connected to mid supply, TA = +25°C. Unless otherwise specified.

S

PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT

AC PERFORMANCE

BW -3dB Bandwidth A
HD Total Harmonic Distortion f = 150kHz, V
dG Differential Gain A
dθ Differential Phase A
SR Slewrate V

= +4 70 MHz

V

=16Vp-p, RL=25Ω -85 dBc

O

= +2, RL = 37.5Ω 0.15 %

V

= +2, RL = 37.5Ω 0.1 °

V

from -3V to +3V 275 350 V/µS

OUT

DC PERFORMANCE

V
ΔV
R

OS

OS

OL

Offset Voltage -20 20 mV
VOS Mismatch -10 10 mV
Transimpedance V

from -4.5V to +4.5V 0.7 1.4 2.5 MΩ

OUT

INPUT CHARACTERISTICS

I

+ Non-Inverting Input Bias Current -3 3 µA

B

I

- Inverting Input Bias Current -30 30 µA

B

e

N

i

N

Input Noise Voltage 2.7 nV√Hz

-Input Noise Current 18 pA/√Hz

OUTPUT CHARACTERISTICS

V

OUT

I

OUT

SUPPLY

V

S

I

S

Loaded Output Swing (single ended) RL = 100Ω to GND, VS = ±6V ±4.8 ±5 V

R

= 25Ω to GND, VS = ±6V ±4.4 ±4.7 V

L

Output Current RL = 0Ω 450 mA

Supply Voltage Single Supply 5 12 V
Supply Current All Outputs at Mid Supply 14.2 18 mA

2

FN7017.2

April 10, 2007

Typical Performance Curves

EL1519

28

AV=10
V

=±6V

S

=100Ω

R

24

L

20

16

GAIN (dB)

12

8

100K 100M1M 10M

FREQUENCY (Hz)

RF=750Ω

RF=1kΩ

RF=500Ω

RF=1kΩ

FIGURE 1. DIFFERENTIAL FREQUENCY RESPONSE vs R

22

AV=5

=±6V

V

S

=100Ω

R

18

L

=750Ω

R

F

14

10

GAIN (dB)

6

CL=10pF

CL=22pF

CL=0pF

22

AV=5

=±6V

V

S

R

=100Ω

18

L

14

10

GAIN (dB)

6

2

100K 100M1M 10M

F

FIGURE 2. DIFFERENTIAL FREQUENCY RESPONSE vs R

55

AV=5

=750Ω

R

F

51

R

=100Ω

L

47

BW (MHz)

43

39

RF=750Ω

FREQUENCY (Hz)

RF=500Ω

RF=1kΩ

F

2

100K 100M1M 10M

FREQUENCY (Hz)

FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE vs C

-45
VS=±2.5V

=5

A

V

R

=750Ω

F

-55

=100Ω

R

L

f=1MHz

-65

HD (dB)

-75

-85

14.55.51.5 2.5 3.5 534

2

V

OP-P

HD3

HD2

(V)

FIGURE 5. DIFFERENTIAL HARMONIC DISTORTION vs

DIFFERENTIAL OUTPUT VOLTAGE

35

2.5 5 634 5.53.5 4.5
(V)

±V

S

L

FIGURE 4. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE

4

3

2

1

PEAKING (dB)

0

-1

-2

2.5 633.5 4.5 5.545
(V)

±V

S

AV=5
R

F

R

L

=750Ω
=100Ω

FIGURE 6. DIFFERENTIAL PEAKING vs SUPPLY VOLTAGE

3

FN7017.2

April 10, 2007

Typical Performance Curves

EL1519

-45
VS=±6V

-50

=5

A

V

=750Ω

R

F

-55

=100Ω

R

L

f=1MHz

-60

-65

-70

HD (dB)

-75

-80

-85

-90

1111935 9 157

V

OP-P

HD3

HD2

1713

(V)

FIGURE 7. DIFFERENTIAL HARMONIC DISTORTION vs

DIFFERENTIAL OUTPUT VOLTAGE

-45

-50

-55

-60

-65

THD (dB)

-70

-75

-80
115193711 17913

VS=±2.5V VS=±6V

5

V

OP-P

(V)

AV=5V

=750Ω

R

F

=100Ω

R

L

f=1MHz

-45

-50

-55

-60

-65

-70

THD (dB)

-75

-80

-85

-90
1152135 9 19713

VS=±2.5V

V

OP-P

(V)

AV=5

=750Ω

R

F

=100Ω

R

L

f=150kHz

VS=±6V

1711

FIGURE 8. DIFFERENTIAL TOTAL HARMONIC DISTORTION

vs DIFFERENTIAL OUTPUT VOLTAGE

-10

-30

-50

-70

ISOLATION (dB)

-90

-110
10K 100K 1M

B → A

A → B

100M10M

FREQUENCY (Hz)

FIGURE 9. DIFFERENTIAL TOTAL HARMONIC DISTORTION

FIGURE 10. CHANNEL ISOLATION vs FREQUENCY

vs DIFFERENTIAL OUTPUT VOLTAGE

100

IB-

10

E

N

CURRENT NOISE (pA/√Hz)

VOLTAGE NOISE (nV/√Hz),

IB+

1

10 10M

FREQUENCY (Hz)

100M100K 1M10K100 1K

30

10

-10

-30

PSRR (dB)

-50

-70
10K

PSRR-

PSRR+

100M100K 10M1M

FREQUENCY (Hz)

FIGURE 11. VOLTAGE AND CURRENT NOISE vs FREQUENCY FIGURE 12. POWER SUPPLY REJECTION vs FREQUENCY

4

FN7017.2

April 10, 2007

Typical Performance Curves

EL1519

100

VS=±6V

=1

A

V

=1.5kΩ

R

10

F

1

0.1

0.01

OUTPUT IMPEDANCE (Ω)

0.001
10K 100K 1M 100M

FREQUENCY (Hz)

10M

10M

1M

100K

10K

MAGNITUDE (Ω)

1K

100

100 10K

GAIN

PHASE

100M1M1K 100K 10M

FREQUENCY (Hz)

FIGURE 13. OUTPUT IMPEDANCE vs FREQUENCY FIGURE 14. TRANSIMEDANCE (ROL) vs FREQUENCY

0.06

0.05

0.04

0.03

PHASE (°)

0.02

DIFFERENTIAL GAIN (%),

DIFFERENTIAL PHASE (°)

0.01

GAIN

PHASE

14.5

14

13.5

13

SUPPLY CURRENT (mA)

50

0

-50

-100

-150

-200

-250

-300

0

03512 4

NUMBER OF 150Ω LOADS

12.5

-50 100 150-25 0 50 12525 75
TEMPERATURE (°C)

FIGURE 15. DIFFERENTIAL GAIN AND DIFFERENTIAL PHASE FIGURE 16. SUPPY CURRENT vs TEMPERATURE

10

8
6
4
2
0

-2

-4

-6

INPUT BIAS CURRENT (µA)

-8

-10

-50 100 150-25 0 50 12525 75

IB-

IB+

TEMPERATURE (°C)

5.2
RL=100Ω

5.15

5.1

50.5
5

4.95

4.9

OUTPUT VOLTAGE (±V)

4.85

4.8

-50 100 150-25 0 50 12525 75
TEMPERATURE (°C)

FIGURE 17. INPUT BIAS CURRENT vs TEMPERATURE FIGURE 18. OUTPUT VOLTAGE vs TEMPERATURE

5

FN7017.2

April 10, 2007

Typical Performance Curves

EL1519

520
510
500
490
480
470

SLEW RATE (V/µs)

460
450
440

-50 100 150-25 0 50 12525 75
TEMPERATURE (°C)

16
14
12
10

8

(mA)

S

I

6
4
2
0

06712 435

±V

(V)

S

FIGURE 19. SLEW RATE vs TEMPERATURE FIGURE 20. SUPPLY CURRENT vs SUPPLY VOLTAGE

7
6
5
4
3
2
1
0

OFFSET VOLTAGE (mV)

-1

-2

-3

-50 100 150-25 0 50 12525 75
TEMPERATURE (°C)

3

2.5

2

1.5

1

0.5

TRANSIMPEDANCE (MΩ)

0

-50 100 150-25 0 50 12525 75
TEMPERATURE (°C)

FIGURE 21. OFFSET VOLTAGE vs TEMPERATURE FIGURE 22. TRANSIMPEDANCE vs TEMPERATURE

AV=5
V

=±6V

S

R

=100Ω

L

=750Ω

R

F

100K 1M 10M 100M

(Hz)

39pF

30pF

22pF

10pF

0pF

FIGURE 23. DIFFERENTIAL FREQUENCY RESPONSE vs C

L

FIGURE 24. DIFFERENTIAL FREQUENCY RESPONSE vs R

22

RF=500Ω

20

18

16

AV=10

14

=±6V

V

S

=100Ω

R

L

12

100K 1M 10M 100M

RF=750Ω

RF=1kΩ

(Hz)

F

6

FN7017.2

April 10, 2007

Typical Performance Curves

AV=5
V

=±6V

S

=100Ω

R

L

100K 1M 10M 100M

RF=500Ω

RF=750Ω

RF=1kΩ

(Hz)

EL1519

JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD

1.4

1.2

1

781mW

0.8

0.6

0.4

POWER DISSIPATION (W)

0.2

0

0

25 50 75 100 15012585

S

O

8

θ

J

A

=

1

6

0

°

C

/

W

AMBIENT TEMPERATURE (°C)

FIGURE 25. DIFFERENTIAL FREQUENCY RESPONSE vs R

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY (4-LAYER) TEST BOARD

3.5

3

2.5

2

1.5

1.136W

1

POWER DISSIPATION (W)

0.5

0

015050 100

S

O

8

1

1

0

°

C/

W

AMBIENT TEMPERATURE (°C)

12525 75 85

F

FIGURE 27. PACKAGE POWER DISSIP A TION vs AMBIENT

TEMPERATURE

Applications Information

Product Description

The EL1519 is a dual operational amplifier designed for
customer premise line driving in DMT ADSL solutions. It is a
dual current mode feedback amplifier with low distortion
while drawing moderately low supply current. It is built using
Elantec's proprietary complimentary bipolar process and is
offered in industry standard pin-outs. Due to the current
feedback architecture, the EL1519 closed-loop 3dB
bandwidth is dependent on the value of the feedback
resistor. First the desired bandwidth is selected by choosing
the feedback resistor, R
the gain resistor, R
Typical Performance Curves section show the effect of
varying both R

and RG. The 3dB bandwidth is somewhat

F

dependent on the power supply voltage.

, and then the gain is set by picking

F

. The curves at the beginning of the

G

FIGURE 26. PACKAGE POWER DISSIP A TION vs AMBIENT

TEMPERATURE

Power Supply Bypassing and Printed Circuit
Board Layout

As with any high frequency device, good printed circuit
board layout is necessary for optimum performance. Ground
plane construction is highly recommended. Lead lengths
should be as short as possible, below 1/4”. The power
supply pins must be well bypassed to reduce the risk of
oscillation. A 1.0µF tantalum capacitor in parallel with a

0.01µF ceramic capacitor is adequate for each supply pin.
For good AC performance, parasitic capacitances should be

kept to a minimum, especially at the inverting input. This
implies keeping the ground plane away from this pin. Carbon
resistors are acceptable, while use of wire-wound resistors
should not be used because of their parasitic inductance.
Similarly, capacitors should be low inductance for best
performance.

7

FN7017.2

April 10, 2007

EL1519

Capacitance at the Inverting Input

Due to the topology of the current feedback amplifier, stray
capacitance at the inverting input will affect the AC and
transient performance of the EL1519 when operating in the
non-inverting configuration.

In the inverting gain mode, added capacitance at the
inverting input has little effect since this point is at a virtual
ground and stray capacitance is therefore not “seen” by the
amplifier.

Feedback Resistor Values

The EL1519 has been designed and specified with
R

=750Ω for AV = +5. This value of feedback resistor yields

F

extremely flat frequency response with little to no peaking
out to 50MHz. As is the case with all current feedback
amplifiers, wider bandwidth, at the expense of slight
peaking, can be obtained by reducing the value of the
feedback resistor. Inversely, larger values of feedback
resistor will cause rolloff to occur at a lower frequency. See
the curves in the Typical Performance Curves section which
show 3dB bandwidth and peaking vs. frequency for various
feedback resistors and various supply voltages.

Bandwidth vs Temperature

Whereas many amplifier's supply current and consequently
3dB bandwidth drop off at high temperature, the EL1519 was
designed to have little supply current variations with
temperature. An immediate benefit from this is that the 3dB
bandwidth does not drop off drastically with temperature.

Supply Voltage Range

The EL1519 has been designed to operate with supply
voltages from ±2.5V to ±6V. Optimum bandwidth, slew rate,
and video characteristics are obtained at higher supply
voltages. However, at ±2.5V supplies, the 3dB bandwidth at
A

= +2 is a respectable 40MHz.

V

Single Supply Operation

If a single supply is desired, values from +5V to +12V can be
used as long as the input common mode range is not
exceeded. When using a single supply, be sure to either 1)
DC bias the inputs at an appropriate common mode voltage
and AC couple the signal, or 2) ensure the driving signal is
within the common mode range of the EL1519.

ADSL CPE Applications

The EL1519 is designed as a line driver for ADSL CPE
modems. It is capable of outputting 250mA of output current
with a typical supply voltage headroom of 1.3V. It can
achieve -85dBc of distortion at low 7.1mA of supply current
per amplifier.

The average line power requirement for the ADSL CPE
application is 13dBm (20mW) into a 100Ω line. The average
line voltage is 1.41V
ratio (crest factor) of 5.3 implies peak voltage of 7.5V into the
line. Using a differential drive configuration and transformer
coupling with standard back termination, a transformer ratio
of 1:2 is selected. The circuit configuration is as shown
below.

. The ADSL DMT peak to average

RMS

+

-

1K

AFE

338Ω

+

-

1K

12.5

TX1

100

1:2

12.5

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 implicat ion or oth erwise u nde r any p a tent or p at ent r ights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

8

FN7017.2

April 10, 2007

Small Outline Package Family (SO)

A

D

NN

(N/2)+1

EL1519

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

(0.150”)

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

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

9

FN7017.2

April 10, 2007