DATASHEET

EL1519
®
Data Sheet
April 10, 2007
FN7017.2
Medium Power Differential Line Driver
Features
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.
• Drives up to 250mA from a +12V supply
The EL1519 is ideal for ADSL, SDSL, HDSL2 and VDSL line
driving applications.
• 20VP-P differential output drive into 100Ω
• -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
Ordering Information
PART NUMBER
PART
MARKING
TAPE &
REEL PACKAGE
PKG.
DWG. #
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)
1519CSZ
-
8 Ld SO
(Pb-Free)
MDP0027
EL1519CSZ-T7
(See Note)
1519CSZ
7"
8 Ld SO
(Pb-Free)
MDP0027
EL1519CSZ-T13
(See Note)
1519CSZ
13"
8 Ld SO
(Pb-Free)
MDP0027
• Video distribution amplifier
• Video twisted-pair line driver
Pinout
EL1519
(8 LD SO)
TOP VIEW
OUTA 1
INA- 2
8 VS
-
7 OUTB
+
INA+ 3
6 INB-
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.
1
GND
4
+
5 INB+
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 (TA = +25°C)
Thermal Information
VS+ Voltage to Ground . . . . . . . . . . . . . . . . . . . . . . -0.3V to +14.6V
VIN+ Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to VS+
Current into any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8mA
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA
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
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
PARAMETER
VS = ±12V, RF = 750Ω, RL = 100Ω connected to mid supply, TA = +25°C. Unless otherwise specified.
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
AC PERFORMANCE
BW
-3dB Bandwidth
AV = +4
70
MHz
HD
Total Harmonic Distortion
f = 150kHz, VO =16Vp-p, RL=25Ω
-85
dBc
dG
Differential Gain
AV = +2, RL = 37.5Ω
0.15
%
dθ
Differential Phase
AV = +2, RL = 37.5Ω
0.1
°
SR
Slewrate
VOUT from -3V to +3V
350
V/µS
275
DC PERFORMANCE
VOS
Offset Voltage
-20
20
mV
ΔVOS
VOS Mismatch
-10
10
mV
ROL
Transimpedance
2.5
MΩ
VOUT from -4.5V to +4.5V
0.7
1.4
INPUT CHARACTERISTICS
IB+
Non-Inverting Input Bias Current
-3
3
µA
IB-
Inverting Input Bias Current
-30
30
µA
eN
Input Noise Voltage
2.7
nV√ Hz
iN
-Input Noise Current
18
pA/√ Hz
OUTPUT CHARACTERISTICS
VOUT
IOUT
Loaded Output Swing (single ended)
RL = 100Ω to GND, VS = ±6V
±4.8
±5
V
RL = 25Ω to GND, VS = ±6V
±4.4
±4.7
V
450
mA
Output Current
RL = 0Ω
VS
Supply Voltage
Single Supply
IS
Supply Current
All Outputs at Mid Supply
SUPPLY
2
5
14.2
12
V
18
mA
FN7017.2
April 10, 2007
EL1519
Typical Performance Curves
28
GAIN (dB)
20
16
RR
F=1kΩ
F=1kΩ
AV=5
VS=±6V
RL=100Ω
18
RF=500Ω
RF=750Ω
RF=500Ω
RF=750Ω
GAIN (dB)
24
22
AV=10
VS=±6V
RL=100Ω
14
RF=1kΩ
10
12
6
8
100K
1M
10M
2
100K
100M
1M
FREQUENCY (Hz)
FIGURE 1. DIFFERENTIAL FREQUENCY RESPONSE vs RF
CL=22pF
51
AV=5
RF=750Ω
RL=100Ω
CL=10pF
BW (MHz)
GAIN (dB)
55
AV=5
VS=±6V
RL=100Ω
RF=750Ω
14
CL=0pF
10
6
47
43
39
2
100K
1M
10M
35
2.5
100M
3
3.5
-45
4
VS=±2.5V
AV=5
RF=750Ω
-55 RL=100Ω
f=1MHz
3
-65
HD3
-75
HD2
2.5
3
3.5
4
4.5
5
5.5
VOP-P (V)
FIGURE 5. DIFFERENTIAL HARMONIC DISTORTION vs
DIFFERENTIAL OUTPUT VOLTAGE
3
5
5.5
6
AV=5
RF=750Ω
RL=100Ω
2
1
0
-1
-85
2
4.5
FIGURE 4. DIFFERENTIAL BANDWIDTH vs SUPPLY VOLTAGE
PEAKING (dB)
HD (dB)
FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE vs CL
1.5
4
±VS (V)
FREQUENCY (Hz)
1
100M
FIGURE 2. DIFFERENTIAL FREQUENCY RESPONSE vs RF
22
18
10M
FREQUENCY (Hz)
-2
2.5
3
3.5
4
4.5
5
5.5
6
±VS (V)
FIGURE 6. DIFFERENTIAL PEAKING vs SUPPLY VOLTAGE
FN7017.2
April 10, 2007
EL1519
Typical Performance Curves
-45
-45
VS=±6V
AV=5
RF=750Ω
RL=100Ω
f=1MHz
-55
HD (dB)
-60
AV=5
RF=750Ω
RL=100Ω
f=150kHz
-50
-55
THD (dB)
-50
-65
-70
HD3
-75
-60
VS=±2.5V
-65
-70
-75
-80
VS=±6V
-80
HD2
-85
-85
-90
-90
1
3
5
7
9
11
15
13
17
19
1
3
5
7
FIGURE 7. DIFFERENTIAL HARMONIC DISTORTION vs
DIFFERENTIAL OUTPUT VOLTAGE
11
13
15
17
19
21
FIGURE 8. DIFFERENTIAL TOTAL HARMONIC DISTORTION
vs DIFFERENTIAL OUTPUT VOLTAGE
-45
-10
AV=5V
RF=750Ω
RL=100Ω
f=1MHz
-55
-30
ISOLATION (dB)
-50
THD (dB)
9
VOP-P (V)
VOP-P (V)
-60
VS=±2.5V
-65
VS=±6V
-70
-50
B→A
-70
A→B
-90
-75
-80
1
3
5
7
9
11
13
15
17
-110
10K
19
100K
VOP-P (V)
FIGURE 9. DIFFERENTIAL TOTAL HARMONIC DISTORTION
vs DIFFERENTIAL OUTPUT VOLTAGE
10M
100M
FIGURE 10. CHANNEL ISOLATION vs FREQUENCY
30
100
10
IBPSRR (dB)
VOLTAGE NOISE (nV/√Hz),
CURRENT NOISE (pA/√Hz)
1M
FREQUENCY (Hz)
10
-10
-30
PSRR-
EN
-50
PSRR+
IB+
1
10
100
1K
10K
100K
1M
10M
100M
FREQUENCY (Hz)
FIGURE 11. VOLTAGE AND CURRENT NOISE vs FREQUENCY
4
-70
10K
100K
1M
10M
100M
FREQUENCY (Hz)
FIGURE 12. POWER SUPPLY REJECTION vs FREQUENCY
FN7017.2
April 10, 2007
EL1519
Typical Performance Curves
10
10M
VS=±6V
AV=1
RF=1.5kΩ
50
1
0.1
-50
PHASE
100K
-100
-150
10K
-200
0.01
1K
-250
0.001
10K
100K
10M
1M
100M
100
100
1K
10K
FREQUENCY (Hz)
10M
-300
100M
14.5
SUPPLY CURRENT (mA)
PHASE (°)
DIFFERENTIAL GAIN (%),
DIFFERENTIAL PHASE (°)
1M
FIGURE 14. TRANSIMEDANCE (ROL) vs FREQUENCY
0.06
0.05
0.04
GAIN
0.03
PHASE
0.02
0.01
0
1
2
3
4
14
13.5
13
12.5
-50
0
5
-25
0
FIGURE 15. DIFFERENTIAL GAIN AND DIFFERENTIAL PHASE
5.15
OUTPUT VOLTAGE (±V)
5.2
8
6
IB-
2
0
-2
50
75
100
125
150
FIGURE 16. SUPPY CURRENT vs TEMPERATURE
10
4
25
TEMPERATURE (°C)
NUMBER OF 150Ω LOADS
IB+
-4
-6
RL=100Ω
5.1
50.5
5
4.95
4.9
4.85
-8
-10
-50
100K
FREQUENCY (Hz)
FIGURE 13. OUTPUT IMPEDANCE vs FREQUENCY
INPUT BIAS CURRENT (µA)
0
GAIN
1M
MAGNITUDE (Ω)
OUTPUT IMPEDANCE (Ω)
100
-25
0
25
50
75
100
125
150
TEMPERATURE (°C)
FIGURE 17. INPUT BIAS CURRENT vs TEMPERATURE
5
4.8
-50
-25
0
25
50
75
100
125
150
TEMPERATURE (°C)
FIGURE 18. OUTPUT VOLTAGE vs TEMPERATURE
FN7017.2
April 10, 2007
EL1519
520
16
510
14
500
12
490
10
IS (mA)
SLEW RATE (V/µs)
Typical Performance Curves
480
8
470
6
460
4
450
2
440
-50
0
-25
0
25
50
75
100
125
150
0
1
2
3
4
5
6
7
±VS (V)
TEMPERATURE (°C)
FIGURE 19. SLEW RATE vs TEMPERATURE
FIGURE 20. SUPPLY CURRENT vs SUPPLY VOLTAGE
3
7
TRANSIMPEDANCE (MΩ)
OFFSET VOLTAGE (mV)
6
5
4
3
2
1
0
-1
2.5
2
1.5
1
0.5
-2
-3
-50
-25
0
25
50
75
100
125
150
0
-50
-25
0
25
50
75
100
125
150
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 21. OFFSET VOLTAGE vs TEMPERATURE
FIGURE 22. TRANSIMPEDANCE vs TEMPERATURE
22
AV=5
VS=±6V
RL=100Ω
RF=750Ω
39pF
RF=500Ω
20
30pF
18
RF=750Ω
22pF
16
10pF
0pF
100K
1M
10M
14
100M
(Hz)
FIGURE 23. DIFFERENTIAL FREQUENCY RESPONSE vs CL
6
RF=1kΩ
AV=10
VS=±6V
RL=100Ω
12
100K
1M
10M
100M
(Hz)
FIGURE 24. DIFFERENTIAL FREQUENCY RESPONSE vs RF
FN7017.2
April 10, 2007
EL1519
Typical Performance Curves
1.4
AV=5
VS=±6V
RL=100Ω
POWER DISSIPATION (W)
RF=500Ω
RF=750Ω
RF=1kΩ
100K
1M
10M
100M
(Hz)
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
1.2
1
0.8
781mW
θJ
0.6
SO
A =1
60
0.4
8
°C
/W
0.2
0
0
25
50
75 85 100
125
150
AMBIENT TEMPERATURE (°C)
FIGURE 25. DIFFERENTIAL FREQUENCY RESPONSE vs RF
FIGURE 26. PACKAGE POWER DISSIPATION vs AMBIENT
TEMPERATURE
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY (4-LAYER) TEST BOARD
POWER DISSIPATION (W)
3.5
3
2.5
2
1.5
1.136W
SO8
110°
C /W
1
0.5
0
0
25
75 85 100
50
125
150
AMBIENT TEMPERATURE (°C)
FIGURE 27. PACKAGE POWER DISSIPATION 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, RF, and then the gain is set by picking
the gain resistor, RG. The curves at the beginning of the
Typical Performance Curves section show the effect of
varying both RF and RG. The 3dB bandwidth is somewhat
dependent on the power supply voltage.
7
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.
FN7017.2
April 10, 2007
EL1519
Capacitance at the Inverting Input
Supply Voltage Range
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.
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
AV = +2 is a respectable 40MHz.
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
RF=750Ω for AV = +5. This value of feedback resistor yields
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.
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 1.41VRMS. The ADSL DMT peak to average
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.
+
-
12.5
1K
TX1
338Ω
1:2
AFE
100
+
-
12.5
1K
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 implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
8
FN7017.2
April 10, 2007
EL1519
Small Outline Package Family (SO)
A
D
h X 45°
(N/2)+1
N
A
PIN #1
I.D. MARK
E1
E
c
SEE DETAIL “X”
1
(N/2)
B
L1
0.010 M C A B
e
H
C
A2
GAUGE
PLANE
SEATING
PLANE
A1
0.004 C
0.010 M C A B
L
b
0.010
4° ±4°
DETAIL X
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO)
INCHES
SYMBOL
SO-14
SO16 (0.300”)
(SOL-16)
SO20
(SOL-20)
SO24
(SOL-24)
SO28
(SOL-28)
TOLERANCE
NOTES
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
-
16
20
24
28
Reference
-
N
SO-8
SO16
(0.150”)
8
14
16
Rev. M 2/07
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
9
FN7017.2
April 10, 2007
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