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1-8
Data Sheet
February 11, 2005
Low-Power 100MHz Gain-of-2 Stable
Operational Amplifier
• 100MHz gain-bandwidth at gain-of-2
The power supply operating range of the EL2045 is from
±18V down to as little as ±2V. For single-supply operation,
the EL2045 operates from 36V down to as little as 2.5V. The
excellent power supply operating range of the EL2045
makes it an obvious choice for applications on a single +5V
or +3V supply.
The EL2045 also features an extremely wide output voltage
swing of ±13.6V with VS = ±15V and RL = 1k. At ±5V,
output voltage swing is a wide ±3.8V with RL = 500 and
±3.2V with RL = 150. Furthermore, for single-supply
operation at +5V, output voltage swing is an excellent 0.3V
to 3.8V with RL = 500.
• Gain-of-2 stable
• Low supply current - 5.2mA at VS = ±15V
• Wide supply range - ±2V to ±18V dual-supply and 2.5V to
36V single-supply
• High slew rate - 275V/µs
• Fast-settling - 80ns to 0.1% for a 10V step
• Low differential gain - 0.02% at AV = +2, RL = 150
• Low differential phase - 0.07° at AV = +2, RL = 150
• Wide output voltage swing - ±13.6V with VS = ±15V,
RL = 1kand 3.8V/0.3V with VS = +5V, RL = 500
• Pb-Free available (RoHS compliant)
Applications
• Video amplifiers
• Single-supply amplifiers
At a gain of +2, the EL2045 has a -3dB bandwidth of
100MHz with a phase margin of 50°. Because of its
conventional voltage-feedback topology, the EL2045 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 EL2045 an ideal choice for
price-sensitive applications requiring low power and high
speed.
• Active filters/integrators
Ordering Information
• Log amplifiers
PACKAGE
TAPE & REEL PKG. DWG. #
EL2045CS
8-Pin SO
-
MDP0027
EL2045CS-T7
8-Pin SO
7”
MDP0027
EL2045CS-T13
8-Pin SO
13”
MDP0027
EL2045CSZ
(See Note)
8-Pin SO
(Pb-free)
-
MDP0027
EL2045CSZ-T7
(See Note)
8-Pin SO
(Pb-free)
7”
MDP0027
EL2045CSZ-T13
(See Note)
8-Pin SO
(Pb-free)
13”
MDP0027
8-Pin PDIP
-
MDP0031
EL2045CN
• High speed sample-and-hold
• High speed signal processing
• ADC/DAC buffers
• Pulse/RF amplifiers
• Pin diode receivers
• Photo multiplier amplifiers
• Difference amplifiers
Pinout
EL2045
(8-PIN SO & 8-PIN PDIP)
TOP VIEW
NC 1
IN- 2
NOTE: Intersil Pb-free 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
FN7030.1
Features
The EL2045 is a high speed, low power, low cost monolithic
operational amplifier built on Elantec's proprietary
complementary bipolar process. The EL2045 is gain-of-2
stable and features a 275V/µs slew rate and 100MHz gainbandwidth at gain-of-2 while requiring only 5.2mA of supply
current.
PART NUMBER
EL2045
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 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
EL2045
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 = 1k unless otherwise specified.
DESCRIPTION
Input Offset Voltage
CONDITION
VS = ±15V
TEMP
MIN
25°C
TYP
MAX
UNIT
0.5
7.0
mV
9.0
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
VOUT
ISC
Output Voltage Swing
Output Short Circuit Current
2
300
nA
400
nA
0.3
nA/°C
3000
V/V
VS = ±15V,VOUT = ±10V, RL = 1k
Common-mode Input Range
µA
All
Open-loop Gain
CMIR
µA
nA
AVOL
Common-mode Rejection Ratio
9.2
50
(Note 1)
CMRR
µA
25°C
Average Offset Current Drift
Power Supply Rejection Ratio
8.2
VS = ±5V
TCIOS
PSRR
µV/°C
25°C
1500
TMIN, TMAX
1500
V/V
VS = ±5V, VOUT = ±2.5V, RL = 500
25°C
2500
V/V
VS = ±5V, VOUT = ±2.5V, RL = 150
25°C
1750
V/V
VS = ±5V to ±15V
25°C
65
85
dB
TMIN, TMAX
60
25°C
70
TMIN, TMAX
70
VCM = ±12V, VOUT = 0V
dB
95
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 = 1k
25°C
±13.4
±13.6
V
TMIN, TMAX
±13.1
VS = ±15V, RL = 500
25°C
±12.0
±13.4
V
VS = ±5V, RL = 500
25°C
±3.4
±3.8
V
VS = ±5V, RL = 150
25°C
±3.2
V
VS = +5V, RL = 500
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
FN7030.1
February 11, 2005
EL2045
DC Electrical Specifications
PARAMETER
IS
VS = ±15V, RL = 1k 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
k
Common-mode
25°C
15
M
CIN
Input Capacitance
AV = +2 @10MHz
25°C
1.0
pF
ROUT
Output Resistance
AV = +2
25°C
50
m
PSOR
Power-Supply Operating Range
Dual-supply
25°C
±2.0
±18.0
V
Single-supply
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 = +2, RF = RG = 1k, CF = 3pF, RL = 1k unless otherwise specified.
DESCRIPTION
-3dB Bandwidth (VOUT = 0.4VPP)
Gain-bandwidth Product
CONDITION
TEMP
MIN
TYP
MAX
UNIT
VS = ±15V, AV = +2
25°C
100
MHz
VS = ±15V, AV = -1
25°C
75
MHz
VS = ±15V, AV = +5
25°C
20
MHz
VS = ±15V, AV = +10
25°C
10
MHz
VS = ±15V, AV = +20
25°C
5
MHz
VS = ±5V, AV = +2
25°C
75
MHz
VS = ±15V
25°C
200
MHz
VS = ±5V
25°C
150
MHz
50
°
275
V/µs
200
V/µs
4.4
MHz
PM
Phase Margin
RL = 1k, CL = 10pF
25°C
SR
Slew Rate (Note 1)
VS = ±15V, RL = 1k
25°C
VS = ±5V, RL = 500
25°C
VS = ±15V
25°C
VS = ±5V
25°C
12.7
MHz
FPBW
Full-power Bandwidth (Note 2)
200
3.2
tR, tF
Rise Time, Fall Time
0.1V output step
25°C
3.0
ns
OS
Overshoot
0.1V output step
25°C
20
%
tPD
Propagation Delay
25°C
2.5
ns
tS
Settling to +0.1% (AV = +2)
VS = ±15V, 10V step
25°C
80
ns
VS = ±5V, 5V step
25°C
60
ns
dG
Differential Gain (Note 3)
NTSC/PAL
25°C
0.02
%
dP
Differential Phase (Note 3)
NTSC/PAL
25°C
0.07
°
eN
Input Noise Voltage
10kHz
25°C
15.0
nV/Hz
iN
Input Noise Current
10kHz
25°C
1.50
pA/Hz
CI STAB
Load Capacitance Stability
AV = +2
25°C
Infinite
pF
NOTES:
1. Slew rate is measured on rising edge.
2. For VS = ±15V, VOUT = 20VPP. For VS = ±5V, VOUT = 5 VPP. Full-power bandwidth is based on slew rate measurement using: FPBW = SR / (2 * Vpeak).
3. Video performance measured at VS = ±15V, AV = +2 with 2 times normal video level across RL = 150. This corresponds to standard video levels across a backterminated 75 load. For other values of RL, see curves.
3
FN7030.1
February 11, 2005
EL2045
EL2045 Test Circuit
Typical Performance Curves
Non-Inverting
Frequency Response
Open-Loop Gain and
Phase vs Frequency
CMRR, PSRR and Closed-Loop
Output Resistance vs Frequency
Supply Current vs
Supply Voltage
4
Inverting Frequency
Response
Frequency Response for
Various Load Resistances
Output Voltage Swing
vs Frequency
Equivalent Input Noise
2nd and 3rd Harmonic
Distortion vs Frequency
Settling Time vs
Output Voltage Change
Common-Mode Input Range
vs Supply Voltage
Output Voltage Range
vs Supply Voltage
FN7030.1
February 11, 2005
EL2045
Typical Performance Curves
(Continued)
Gain-Bandwidth Product
vs Supply Voltage
Bias and Offset Current
vs Input Common-Mode Voltage
Open-Loop Gain
vs Supply Voltage
Slew-Rate vs
Supply 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
FN7030.1
February 11, 2005
EL2045
Typical Performance Curves (Continued)
Short-Circuit Current
vs Temperature
Gain-Bandwidth Product
vs Load Capacitance
Small-Signal
Step Response
Overshoot vs
Load Capacitance
Large-Signal
Step Response
Differential Gain and
Phase vs DC Input
Offset at 3.58MHz
Differential Gain and
Phase vs DC Input
Offset at 4.43MHz
Differential Gain and
Phase vs Number of
150 Loads at 3.58MHz
Package Power Dissipation vs Ambient Temperature
JEDEC
JESD51-3 Low Effective Thermal Conductivity8-Lead
Test SO
8-Pin PDIP
Board
Maximum Power
Maximum Power
1.4 Dissipation
Dissipation
Differential Gain and
Phase vs Number of
150 Loads at 4.43MHz
Power Dissipation (W)
1.2 1.25W
PD
IP
8

JA
=
1
10
0°
C/
W
0.8
781mW
SO
8
J
0.6
A =1
60
°C
/W
0.4
0.2
0
0
25
50
75 85 100
125
150
Ambient Temperature (°C)
6
FN7030.1
February 11, 2005
EL2045
Simplified Schematic
ability to use diodes in the feedback network, the EL2045 is
an excellent choice for applications such as fast log
amplifiers.
Burn-In Circuit
Single-Supply Operation
ALL PACKAGES USE THE SAME SCHEMATIC
Applications Information
Product Description
The EL2045 is a low-power wideband, gain-of-2 stable
monolithic operational amplifier built on Elantec's proprietary
high-speed complementary bipolar process. The EL2045
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 EL2045 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. Similarly, because of the
7
The EL2045 has been designed to have a wide input and
output voltage range. This design also makes the EL2045 an
excellent choice for single-supply operation. Using a single
positive supply, the lower input voltage range is within
100mV of ground (RL = 500), 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
5V supply and RL = 500. 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
EL2045 still has 1V of output swing.
Gain-Bandwidth Product and the -3dB Bandwidth
The EL2045 has a gain-bandwidth product of 100MHz 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 EL2045 has a -3dB
bandwidth of 100MHz at a gain of +2, dropping to 20MHz at
a gain of +5. It is important to note that the EL2045 has been
FN7030.1
February 11, 2005
EL2045
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 EL2045 in a gain
of +2 only exhibits 1.0dB of peaking with a 1k load.
Video Performance
An industry-standard method of measuring the video
distortion of a component such as the EL2045 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 (75 in series at the drive end, and 75 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 EL2045 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 150, with
standard video test levels at the input, the EL2045 exhibits
dG and dP of only 0.02% and 0.07° at NTSC and PAL.
Because dG and dP can vary with different DC offsets, the
video performance of the EL2045 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 EL2045 allows it to drive up
to 2 back-terminated loads with good video performance.
For more demanding applications such as greater output
drive or better video distortion, a number of alternatives such
as the EL2120, EL400, or EL2074 should be considered.
Printed-Circuit Layout
The EL2045 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. Pin 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 5k 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 EL2045 Macromodel
This macromodel has been developed to assist the user in
simulating the EL2045 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
Output Drive Capability
The EL2045 has been designed to drive low impedance
loads. It can easily drive 6VPP into a 150 load. This high
output drive capability makes the EL2045 an ideal choice for
RF, IF and video applications. Furthermore, the current drive
of the EL2045 remains a minimum of 35mA at low
temperatures.
8
FN7030.1
February 11, 2005
EL2045
EL2045 Macromodel
* Connections: +input
*
| | -input
*
| | +Vsupply
*
| | |
-Vsupply
*
| | |
| output
*
| | |
| |
.subckt M2045 3 2 7 4 6
*
* Input stage
*
ie 7 37 0.9mA
r6 36 37 400
r7 38 37 400
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 1.5pF
rc 34 40 1K
cc 40 0 1pF
*
* Poles
*
ep 41 0 40 0 1
rpa 41 42 200
cpa 42 0 2pF
rpb 42 43 200
cpb 43 0 2pF
*
* 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
*
* 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
FN7030.1
February 11, 2005
EL2045
EL2045 Macromodel (Continued)
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9001 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
FN7030.1
February 11, 2005
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