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EL2044
®
Low Power/Low Voltage 120MHz UnityGain Stable Operational Amplifier
The EL2044 is a high speed, low
power, low cost monolithic operational
amplifier built on Elantec's proprietary
complementary bipolar process. The EL2044 is unity-gain
stable and features a 325V/µs slew rate and 120MHz gainbandwidth product while requiring only 5.2mA of supply
current.
The power supply operating range of the EL2044 is from
±18V down to as little as ±2V. For single-supply operation,
the EL2044 operates from 36V down to as little as 2.5V. The
excellent power supply operating range of the EL2044
makes it an obvious choice for applications on a single +5V
supply.
The EL2044 also features an extremely wide output voltage
swing of ±13.6V with VS = ±15V and RL = 1kΩ. At ±5V,
output voltage swing is a wide ±3.8V with RL = 500Ω and
±3.2V with RL = 150Ω. Furthermore, for single-supply
operation at +5V, output voltage swing is an excellent 0.3V
to 3.8V with RL = 500Ω.
August 16, 2004
Features
• Pb-free available
• 120MHz -3dB bandwidth
• Unity-gain stable
• Low supply current - 5.2mA @VS = ±15V
• Wide supply range - ±2V to ±18V dual-supply and 2.5V to
36V single-supply
• High slew rate = 325V/µs
• Fast settling - 80ns to 0.1% for a 10V step
• Low differential gain - 0.04% at AV = +2, RL = 150Ω
• Low differential phase - 0.15° at AV = +2, RL = 150Ω
• Wide output voltage swing - ±13.6V with VS = ±15V,
RL = 1kΩ and 3.8V/0.3V with VS = +5V, RL = 500Ω
• Low cost, enhanced replacement for the AD847 and
LM6361
Applications
• Video amplifiers
At a gain of +1, the EL2044 has a -3dB bandwidth of
120MHz with a phase margin of 50°. Because of its
conventional voltage-feedback topology, the EL2044 allows
the use of reactive or non-linear elements in its feedback
network. This versatility combined with low cost and 75mA of
output-current drive makes the EL2044 an ideal choice for
price-sensitive applications requiring low power and high
speed.
• Single-supply amplifiers
The EL2044 is available in the 8-pin SO and 8-pin PDIP
packages and operates over the full -40°C to +85°C
temperature range.
• Pin diode receivers
Ordering Information
• Photo multiplier amplifiers
TAPE &
REEL
PKG. DWG. #
EL2044CS
8-Pin SO
-
MDP0027
EL2044CSZ
(See Note)
8-Pin SO
(Pb-free)
-
MDP0027
EL2044CS-T7
8-Pin SO
7”
MDP0027
EL2044CSZ-T7
(See Note)
8-Pin SO
(Pb-free)
7”
MDP0027
• High speed sample-and-hold
• High speed signal processing
• ADC/DAC buffers
• Pulse/RF amplifiers
• Log amplifiers
Pinout
EL2044
(8-PIN SO & 8-PIN PDIP)
TOP VIEW
NC 1
EL2044CS-T13
8-Pin SO
13”
MDP0027
EL2044CSZT13 (See Note)
8-Pin SO
(Pb-free)
13”
MDP0027
8-Pin PDIP
-
MDP0031
EL2044CN
• Active filters/integrators
• Difference amplifiers
PACKAGE
PART NUMBER
FN7029.1
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which is
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-020B.
1
IN- 2
IN+ 3
V- 4
8 NC
+
7 V+
6 OUT
5 NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003, 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL2044
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage (VS). . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18V or 36V
Input Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VS
Differential Input Voltage (dVIN) . . . . . . . . . . . . . . . . . . . . . . . .±10V
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 60mA
Power Dissipation (PD) . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Temperature Range (TA) . . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature (TST). . . . . . . . . . . . . . . . . . .-65°C to +150°C
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
DC Electrical Specifications
PARAMETER
VOS
VS = ±15V, RL = 1kΩ, unless otherwise specified.
DESCRIPTION
Input Offset Voltage
CONDITION
VS = ±15V
TEMP
MIN
25°C
TYP
MAX
UNIT
0.5
7.0
mV
13.0
mV
TMIN, TMAX
TCVOS
Average Offset Voltage Drift
IB
Input Bias Current
VS = ±15V
All
10.0
25°C
2.8
TMIN, TMAX
IOS
Input Offset Current
VS = ±5V
25°C
2.8
VS = ±15V
25°C
50
TMIN, TMAX
VS = ±5V
TCIOS
Average Offset Current Drift
(Note 1)
AVOL
Open-loop Gain
VS = ±15V,VOUT = ±10V, RL = 1kΩ
PSRR
CMRR
CMIR
VOUT
ISC
Power Supply Rejection Ratio
Output Voltage Swing
Output Short Circuit Current
2
8.2
µA
11.2
µA
µA
300
nA
500
nA
25°C
50
nA
All
0.3
nA/°C
1500
V/V
25°C
800
TMIN, TMAX
600
V/V
VS = ±5V, VOUT = ±2.5V, RL = 500Ω
25°C
1200
V/V
VS = ±5V, VOUT = ±2.5V, RL = 150Ω
25°C
1000
V/V
VS = ±5V to ±15V
25°C
65
80
dB
TMIN, TMAX
60
25°C
70
TMIN, TMAX
70
Common-mode Rejection Ratio VCM = ±12V, VOUT = 0V
Common-mode Input Range
µV/°C
dB
90
dB
dB
VS = ±15V
25°C
±14.0
V
VS = ±5V
25°C
±4.2
V
VS = +5V
25°C
4.2/0.1
V
VS = ±15V, RL = 1kΩ
25°C
±13.4
±13.6
V
TMIN, TMAX
±13.1
VS = ±15V, RL = 500Ω
25°C
±12.0
±13.4
V
VS = ±5V, RL = 500Ω
25°C
±3.4
±3.8
V
VS = ±5V, RL = 150Ω
25°C
±3.2
V
VS = +5V, RL = 500Ω
25°C
3.6/0.4
3.8/0.3
V
TMIN, TMAX
3.5/0.5
25°C
40
TMIN, TMAX
35
V
V
75
mA
mA
EL2044
DC Electrical Specifications
PARAMETER
IS
VS = ±15V, RL = 1kΩ, unless otherwise specified. (Continued)
DESCRIPTION
Supply Current
CONDITION
VS = ±15V, no load
TEMP
MIN
25°C
TYP
MAX
UNIT
5.2
7
mA
7.6
mA
TMIN, TMAX
RIN
Input Resistance
VS = ±5V, no load
25°C
5.0
mA
Differential
25°C
150
kΩ
Common-mode
25°C
15
MΩ
CIN
Input Capacitance
AV = +1 @10MHz
25°C
1.0
pF
ROUT
Output Resistance
AV = +1
25°C
50
mΩ
PSOR
Power-supply Operating Range Dual-supply
Single-supply
25°C
±2.0
±18.0
V
25°C
2.5
36.0
V
NOTE:
1. Measured from TMIN to TMAX.
Closed-Loop AC Electrical Specifications
PARAMETER
BW
GBWP
VS = ±15V, AV = +1, RL = 1kΩ unless otherwise specified.
DESCRIPTION
CONDITION
TEMP
MIN
TYP
MAX
UNIT
-3dB Bandwidth (VOUT = 0.4VPP) VS = ±15V, AV = +1
25°C
120
MHz
VS = ±15V, AV = -1
25°C
60
MHz
VS = ±15V, AV = +2
25°C
60
MHz
VS = ±15V, AV = +5
25°C
12
MHz
VS = ±15V, AV = +10
25°C
6
MHz
VS = ±5V, AV = +1
25°C
80
MHz
VS = ±15V
25°C
60
MHz
VS = ±5V
25°C
45
MHz
50
°
325
V/µs
200
V/µs
5.2
MHz
Gain-bandwidth Product
PM
Phase Margin
RL = 1 kΩ, CL = 10 pF
25°C
SR
Slew Rate (Note 1)
VS = ±15V, RL = 1kΩ
25°C
VS = ±5V, RL = 500Ω
25°C
VS = ±15V
25°C
VS = ±5V
25°C
12.7
MHz
FPBW
Full-power Bandwidth (Note 2)
250
4.0
tR, tF
Rise Time, Fall Time
0.1V Step
25°C
3.0
ns
OS
Overshoot
0.1V Step
25°C
20
%
tPD
Propagation Delay
25°C
2.5
ns
tS
Settling to +0.1% (AV = +1)
25°C
80
ns
60
ns
VS = ±15V, 10V step
VS = ±5V, 5V step
dG
Differential Gain (Note 3)
NTSC/PAL
25°C
0.04
%
dP
Differential Phase
NTSC/PAL
25°C
0.15
°
eN
Input Noise Voltage
10kHz
25°C
15.0
nV/√Hz
iN
Input Noise Current
10kHz
25°C
1.50
pA/√Hz
NOTES:
1. Slew rate is measured on rising edge.
2. For VS = ±15V, VOUT = 20VPP. For VS = ±5V, VOUT = 5VPP. Full-power bandwidth is based on slew rate measurement using: FPBW = SR / (2π * Vpeak).
3. Video performance measured at VS = ±15V, AV = +2 with 2 times normal video level across RL = 150Ω. This corresponds to standard video levels across
a back-terminated 75Ω load. For other values of RL, see curves.
3
EL2044
Typical Performance Curves
Non-Inverting
Frequency Response
Inverting Frequency
Response
Frequency Response for
Various Load Resistances
Open-Loop Gain and
Phase vs Frequency
Output Voltage Swing
vs Frequency
Equivalent Input Noise
2nd and 3rd Harmonic
Distortion vs Frequency
Settling Time vs
Output Voltage Change
CMRR, PSRR and ClosedLoop Output Resistance vs
Frequency
Supply Current vs
Supply Voltage
4
Common-Mode Input
Range vs Supply Voltage
Output Voltage Range
vs Supply Voltage
EL2044
Typical Performance Curves
(Continued)
Gain-Bandwidth Product
vs Supply Voltage
Open-Loop Gain
vs Supply Voltage
Slew-Rate vs
Supply Voltage
Bias and Offset Current
vs Input Common-Mode
Voltage
Open-Loop Gain
vs Load Resistance
Voltage Swing
vs Load Resistance
Offset Voltage
vs Temperature
Bias and Offset
Current vs Temperature
Supply Current
vs Temperature
Gain-Bandwidth Product
vs Temperature
Open-Loop Gain PSRR
and CMRR vs Temperature
Slew Rate vs
Temperature
5
EL2044
Typical Performance Curves
(Continued)
Short-Circuit Current
vs Temperature
Small-Signal
Step Response
Differential Gain and
Phase vs DC Input
Offset at 3.58MHz
Short-Circuit Current
Large-Signal
Differential Gain and
Phase vs DC Input
Offset at 4.43MHz
Differential Gain and
Phase vs Number of
150Ω Loads at 3.58MHz
Differential Gain and
Phase vs Number of
150Ω Loads at 4.43MHz
Gain-Bandwidth Product vs Load Capacitance
Gain-Bandwidth Product (MHz)
70
60
50
40
30
20
10
VS=±15V
AV=-2
0
1
10
100
1k
10k
Load Capacitance (pF)
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-3 Low Effective Thermal Conductivity
Test Board
35
1.4
30
1.2 1.25W
Power Dissipation (W)
Overshoot (%)
Overshoot vs Load Capacitance
25
20
15
10
5
VS=±15V
RG=open
0
5
10
θ
JA
=
1
0.8
781mW
0.6
PD
IP
8
10
0°
C/
W
θJ
A =1
0.4
SO
8
60
°C
/W
0.2
15
20
25
Load Capacitance (pF)
6
30
35
0
0
25
50
75 85 100
Ambient Temperature (°C)
125
150
EL2044
Simplified Schematic
Burn-In Circuit
ALL PACKAGES USE THE SAME SCHEMATIC
Applications Information
Product Description
The EL2044 is a low-power wideband monolithic operational
amplifier built on Elantec's proprietary high-speed
complementary bipolar process. The EL2044 uses a
classical voltage-feedback topology which allows it 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 EL2044 allows, for example, a
capacitor to be placed in the feedback path, making it an
excellent choice for applications such as active filters,
7
sample-and-holds, or integrators. Similarly, because of the
ability to use diodes in the feedback network, the EL2044 is
an excellent choice for applications such as fast log
amplifiers.
Single-Supply Operation
The EL2044 has been designed to have a wide input and
output voltage range. This design also makes the EL2044 an
excellent choice for single-supply operation. Using a single
positive supply, the lower input voltage range is within
100mV of ground (RL = 500Ω), and the lower output voltage
range is within 300mV of ground. Upper input voltage range
reaches 4.2V, and output voltage range reaches 3.8V with a
EL2044
5V supply and RL = 500Ω. This results in a 3.5V output
swing on a single 5V supply. This wide output voltage range
also allows single-supply operation with a supply voltage as
high as 36V or as low as 2.5V. On a single 2.5V supply, the
EL2044 still has 1V of output swing.
Gain-Bandwidth Product and the -3dB Bandwidth
The EL2044 has a gain-bandwidth product of 60MHz while
using only 5.2mA of supply current. For gains greater than 4,
its closed-loop -3dB bandwidth is approximately equal to the
gain-bandwidth product divided by the noise gain of the
circuit. For gains less than 4, higher-order poles in the
amplifier's transfer function contribute to even higher closed
loop bandwidths. For example, the EL2044 has a -3dB
bandwidth of 120MHz at a gain of +1, dropping to 60MHz at
a gain of +2. It is important to note that the EL2044 has 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 EL2044 in a gain
of +1 only exhibits 1.0dB of peaking with a 1kΩ load.
Video Performance
An industry-standard method of measuring the video
distortion of a component such as the EL2044 is to measure
the amount of differential gain (dG) and differential phase
(dP) that it introduces. To make these measurements, a
0.286VPP (40 IRE) signal is applied to the device with 0V DC
offset (0 IRE) at either 3.58MHz for NTSC or 4.43MHz for
PAL. A second measurement is then made at 0.714V DC
offset (100 IRE). Differential gain is a measure of the change
in amplitude of the sine wave, and is measured in percent.
Differential phase is a measure of the change in phase, and
is measured in degrees.
For signal transmission and distribution, a back-terminated
cable (75Ω in series at the drive end, and 75Ω to ground at
the receiving end) is preferred since the impedance match at
both ends will absorb any reflections. However, when double
termination is used, the received signal is halved; therefore a
gain of 2 configuration is typically used to compensate for
the attenuation.
The EL2044 has been designed as an economical solution
for applications requiring low video distortion. It has been
thoroughly characterized for video performance in the
topology described above, and the results have been
included as typical dG and dP specifications and as typical
performance curves. In a gain of +2, driving 150Ω, with
standard video test levels at the input, the EL2044 exhibits
dG and dP of only 0.04% and 0.15° at NTSC and PAL.
Because dG and dP can vary with different DC offsets, the
video performance of the EL2044 has been characterized
over the entire DC offset range from -0.714V to +0.714V. For
more information, refer to the curves of dG and dP vs DC
Input Offset.
The output drive capability of the EL2044 allows it to drive up
to 2 back-terminated loads with good video performance.
8
For more demanding applications such as greater output
drive or better video distortion, a number of alternatives such
as the EL2120, EL400, or EL2073 should be considered.
Output Drive Capability
The EL2044 has been designed to drive low impedance
loads. It can easily drive 6VPP into a 150Ω load. This high
output drive capability makes the EL2044 an ideal choice for
RF, IF and video applications. Furthermore, the current drive
of the EL2044 remains a minimum of 35mA at low
temperatures.
Printed-Circuit Layout
The EL2044 is 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
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 5kΩ 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.
The EL2044 Macromodel
This macromodel has been developed to assist the user in
simulating the EL2044 with surrounding circuitry. It has been
developed for the PSPICE simulator (copywritten by the
Microsim Corporation), and may need to be rearranged for
other simulators. It approximates DC, AC, and transient
response for resistive loads, but does not accurately model
capacitive loading. This model is slightly more complicated
than the models used for low-frequency op-amps, but it is
much more accurate for AC analysis.
The model does not simulate these characteristics
accurately:
• Noise
• Settling time
• Non-linearities
• Temperature effects
• Manufacturing variations
• CMRR
• PSRR
EL2044
EL2044 Macromodel
IN+IN+IN+IN+IN+IN+NININININ
* Connections: +input
*
|
-input
*
|
|
+Vsupply
*
|
|
|
-Vsupply
*
|
|
|
|
output
*
|
|
|
|
|
.subckt M2044 3 2 7 4 6
*
* Input stage
*
ie 7 37 1mA
r6 36 37 800
r7 38 37 800
rc1 4 30 850
rc2 4 39 850
q1 30 3 36 qp
q2 39 2 38 qpa
ediff 33 0 39 30 1.0
rdiff 33 0 1Meg
*
* Compensation Section
*
ga 0 34 33 0 1m
rh 34 0 2Meg
ch 34 0 1.3pF
rc 34 40 1K
cc 40 0 1pF
*
* Poles
*
ep 41 0 40 0 1
rpa 41 42 200
cpa 42 0 1pF
rpb 42 43 200
cpb 43 0 1pF
*
* Output Stage
*
ios1 7 50 1.0mA
ios2 51 4 1.0mA
q3 4 43 50 qp
q4 7 43 51 qn
q5 7 50 52 qn
q6 4 51 53 qp
ros1 52 6 25
ros2 6 53 25
*
* Power Supply Current
*
ips 7 4 2.7mA
*
IN+IN+IN+IN+IN+IN+NININININ
* Models
*
.model qn npn(is=800E-18 bf=200 tf=0.2nS)
.model qpa pnp(is=864E-18 bf=100 tf=0.2nS)
.model qp pnp(is=800E-18 bf=125 tf=0.2nS)
.ends
9
EL2044
EL2044 Macromodel (Continued)
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
10
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