INTERSIL EL2075CS

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1- 888
®
2GHz GBWP Gain-of-10 Stable
Operational Amplifier
The EL2075 is a precision voltagefeedback amplifier featuring a 2GHz
gain-bandwidth product, fast settling
time, excellent differential gain and differential phase
performance, and a minimum of 50mA output current drive
over temperature.
The EL2075 is gain-of-10 stable with a -3dB bandwidth of
400MHz at AV = +10. It has a very low 200µV of input offset
voltage, only 2µA of input bias current, and a fully
symmetrical differential input. Like all voltage-feedback
operational amplifiers, the EL2075 allows the use of reactive
or non-linear components in the feedback loop. This
combination of speed and versatility makes the EL2075 the
ideal choice for all op-amp applications at a gain of 10 or
greater requiring high speed and precision, including active
filters, integrators, sample-and-holds, and log amps. The low
distortion, high output current, and fast settling makes the
EL2075 an ideal amplifier for signal-processing and
digitizing systems.
EL2075
FN7151
September 26, 2001
Features
• 2GHz gain-bandwidth product
• Gain-of-10 stable
• Conventional voltage-feedback topology
• Low offset voltage = 200µV
• Low bias current = 2µA
• Low offset current = 0.1µA
• Output current = 50mA over temperature
• Fast settling = 13ns to 0.1%
Applications
• Active filters/integrators
• High-speed signal processing
• ADC/DAC buffers
• Pulse/RF amplifiers
• Pin diode receivers
• Log amplifiers
EL2075
(8-PIN SO, PDIP)
TOP VIEW
• Photo multiplier amplifiers
• High speed sample-and-holds
Ordering Information
PART
NUMBER
1
TEMP. RANGE
PACKAGE
PKG. NO.
EL2075CN
0°C to +75°C
8-Pin PDIP
MDP0031
EL2075CS
0°C to +75°C
8-Pin SO
MDP0027
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. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL2075
Absolute Maximum Ratings (TA = 25°C)
Supply Voltage (V S). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±7V
Output Current Output is short-circuit protected to ground, however,
maximum reliability is obtained if IOUT does not exceed 70mA.
Common-Mode Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±VS
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . .θJA = 95°C/W PDIP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . θJA = 175°C/W SO-8
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +75°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175°C
Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . . -60°C to +150°C
Note: See EL2071/EL2171 for Thermal Impedance 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
Open-Loop DC Electrical Specifications
PARAMETER
VOS
DESCRIPTION
Input Offset Voltage
VS = ±5V, RL = 100Ω, unless otherwise specified.
TEST CONDITIONS
VCM = 0V
TEMP
MIN
25°C
TYP
MAX
UNIT
0.2
1
mV
2.5
mV
TMIN, TMAX
TCV OS
Average Offset Voltage Drift
(Note 1)
All
8
IB
Input Bias Current
VCM = 0V
All
2
6
µA
IOS
Input Offset Current
VCM = 0V
25°C
0.1
1
µA
2
µA
TMIN, TMAX
µV/°C
PSRR
Power Supply Rejection Ratio
(Note 2)
All
70
90
dB
CMRR
Common Mode Rejection Ratio
(Note 3)
All
70
90
dB
IS
Supply Current—Quiescent
No Load
25°C
21
TMIN, TMAX
25
mA
25
mA
RIN (diff)
RIN (Differential)
Open-Loop
25°C
15
kΩ
CIN (diff)
CIN (Differential)
Open-Loop
25°C
1
pF
RIN (cm)
RIN (Common-Mode)
25°C
1
MΩ
CIN (cm)
CIN (Common-Mode)
25°C
1
pF
ROUT
Output Resistance
25°C
50
mΩ
CMIR
Common-Mode Input
Range
25°C
±3
±3.5
V
TMIN, TMAX
±2.5
All
50
70
mA
V
IOUT
Output Current
VOUT
Output Voltage Swing
No Load
All
±3.5
±4
V
VOUT 100
Output Voltage Swing
100Ω
All
±3
±3.6
V
VOUT 50
Output Voltage Swing
50Ω
All
±2.5
±3.4
V
AVOL 100
Open-Loop Gain
100Ω
25°C
1000
2800
V/V
TMIN, TMAX
800
25°C
800
TMIN, TMAX
600
AVOL 50
Open-Loop Gain
50Ω
V/V
2300
V/V
V/V
eN@ > 1MHz
Noise Voltage 1–100MHz
25°C
2.3
nV/√Hz
iN@ > 100kHz
Noise Current 100k–100MHz
25°C
3.2
pA/√Hz
NOTES:
1. Measured from T MIN, TMAX.
2. ±VCC = ±4.5V to 5.5V.
3. ±VIN = ±2.5V, V OUT = 0V.
2
EL2075
Closed-Loop AC Electrical Specifications
PARAMETER
SSBW
DESCRIPTION
-3dB Bandwidth
(VOUT = 0.4VPP)
VS = ±5V, AV = +20, RF = 1500Ω, RL = 100Ω unless otherwise specified.
TEST CONDITIONS
TEMP
MIN
AV = +10
25°C
AV = +20
25°C
150
TMIN, TMAX
125
TYP
MAX
UNIT
400
MHz
200
MHz
MHz
AV = +50
25°C
40
MHz
25°C
2.0
GHz
GBWP
Gain-Bandwidth Product
AV = +100
LSBWa
-3dB Bandwidth
VOUT = 2VPP (Note 1)
All
80
128
MHz
LSBWb
-3dB Bandwidth
VOUT = 5VPP (Note 1)
All
32
50
MHz
GFPL
Peaking (< 50MHz)
VOUT = 0.4V PP
25°C
0
TMIN, TMAX
GFPH
Peaking (> 50MHz)
VOUT = 0.4V PP
25°C
0
TMIN, TMAX
GFR
Rolloff (< 100MHz)
VOUT = 0.4V PP
25°C
0.1
TMIN, TMAX
LPD
Linear Phase Deviation (< 100MHz)
VOUT = 0.4V PP
PM
Phase Margin
tR1, tF1
0.5
dB
0.5
dB
1
dB
1
dB
0.5
dB
0.5
dB
1.8
°
All
1
AV = +10
25°C
60
°
Rise Time, Fall Time
0.4V Step, AV = +10
25°C
1.2
ns
tR2, tF2
Rise Time, Fall Time
5V Step, AV = +10
25°C
6
ns
tS1
Settling to 0.1% (AV = -20)
2V Step
25°C
13
ns
tS2
Settling to 0.01% (AV = -20)
2V Step
25°C
25
ns
OS
Overshoot
2V Step, AV = +10
25°C
10
%
SR
Slew Rate
2V Step, AV = +10
All
800
V/µs
500
DISTORTION (Note 2)
HD2
2nd Harmonic Distortion
@ 20MHz, AV = +20
25°C
-40
TMIN, TMAX
HD3
3rd Harmonic Distortion
@ 20MHz, AV = +20
25°C
TMIN, TMAX
NOTES:
1. Large-signal bandwidth calculated using LSBW = Slew Rate (2π * VPEAK).
2. All distortion measurements are made with VOUT = 2VPP, RL = 100Ω.
3
-65
-30
dBc
-30
dBc
-50
dBc
-50
dBc
EL2075
Typical Performance Curves
Non-Inverting
Frequency Response
Inverting Frequency Response
Frequency Response
for Various RLs
Open Loop Gain
and Phase
Output Voltage Swing
vs Frequency
Equivalent Input Noise
PSRR, CMRR, and Closed-Loop
RO Frequency
2nd and 3rd Harmonic
Distortion vs Frequency
2-Tone, 3rd Order
Intermodulation Intercept
4
EL2075
Typical Performance Curves
(Continued)
Series Resistor and Resulting
Bandwidth vs Capacitive Load
Settling Time vs
Output Voltage Change
Settling Time vs
Closed-Loop Gain
Common-Mode Rejection
Ratio vs Input Common-Mode
Voltage
Bias and Offset Current vs
Input Common-Mode Voltage
Supply Current
vs Temperature
Bias and Offset Current
vs Temperature
Offset Voltage
vs Temperature
AVOL, PSRR, and CMRR
vs Temperature
Small Signal Transient Response
5
Large Signal Transient Response
EL2075
Equivalent Circuit
Burn-In Circuit
for applications such as active filters, sample-and-holds, or
integrators. Similarly, because of the ability to use diodes in
the feedback network, the EL2075 is an excellent choice for
applications such as log amplifiers.
The EL2075 also has excellent DC specifications: 200µV,
VOS , 2µA IB, 0.1µA I OS , and 90dB of CMRR. These
specifications allow the EL2075 to be used in DC-sensitive
applications such as difference amplifiers. Furthermore, the
current noise of the EL2075 is only 3.2pA/√Hz, making it an
excellent choice for high-sensitivity transimpedance amplifier
configurations.
Gain-Bandwidth Product
All Packages Use The Same Schematic
Applications Information
Product Description
The EL2075 is a wideband monolithic operational amplifier
built on a high-speed complementary bipolar process. The
EL2075 uses a classical voltage-feedback topology which
allows it to be used in a variety of applications requiring a
noise gain ≥ 10 where current-feedback amplifiers are not
appropriate because of restrictions placed upon the
feedback element used with the amplifier. The conventional
topology of the EL2075 allows, for example, a capacitor to
be placed in the feedback path, making it an excellent choice
6
The EL2075 has a gain-bandwidth product of 2GHz. For
gains greater than 40, 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 40,
higher-order poles in the amplifier's transfer function
contribute to even higher closed loop bandwidths. For
example, the EL2075 has a -3dB bandwidth of 400MHz at a
gain of +10, dropping to 200MHz at a gain of +20. It is
important to note that the EL2075 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 EL2075 in a gain of +10 only
exhibits 1.5dB of peaking with a 100Ω load.
EL2075
Output Drive Capability
The EL2075 has been optimized to drive 50Ω and 75Ω
loads. It can easily drive 6VPP into a 50Ω load. This high
output drive capability makes the EL2075 an ideal choice for
RF and IF applications. Furthermore, the current drive of the
EL2075 remains a minimum of 50mA at low temperatures.
The EL2075 is current-limited at the output, allowing it to
withstand momentary shorts to ground. However, power
dissipation with the output shorted can be in excess of the
power-dissipation capabilities of the package.
Capacitive Loads
Although the EL2075 has been optimized to drive resistive
loads as low as 50Ω, capacitive loads will decrease the
amplifier's phase margin which may result in peaking,
overshoot, and possible oscillation. For optimum AC
performance, capacitive loads should be reduced as much
as possible or isolated via a series output resistor. Coax
lines can be driven, as long as they are terminated with their
characteristic impedance. When properly terminated, the
capacitance of coaxial cable will not add to the capacitive
load seen by the amplifier. Capacitive loads greater than
10pF should be buffered with a series resistor (RS) to isolate
the load capacitance from the amplifier output. A curve of
recommended RS vs C LOAD has been included for
reference. Values of R S were chosen to maximize resulting
bandwidth without additional peaking.
Printed-Circuit Layout
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 1µF–10µF tantalum capacitor is
recommended in parallel with a 0.01µF ceramic capacitor.
All pin lengths should be as short as possible, and all bypass
capacitors should be as close to the device pins as possible.
Parasitic capacitances should be kept to an absolute
minimum at both inputs and at the output. Resistor values
should be kept under 1000Ω to 2000Ω 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
parasitic inductance. Similarly, capacitors should be lowinductance for best performance. If possible, solder the
EL2075 directly to the PC board without a socket. Even high
quality sockets add parasitic capacitance and inductance
which can potentially degrade performance. Because of the
degradation of AC performance due to parasitics, the use of
surface-mount components (resistors, capacitors, etc.) is
also recommended.
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
7
EL2075
EL2075 Macromodel
*
* Connections:
input
*
|
-input
*
|
|
+Vsupply
*
|
|
|
-Vsupply
*
|
|
|
| output
*
|
|
|
| |
.subckt M2075C 3 2 7 4 6
*
*Input Stage
*
ie 37 4 1mA
r6 36 37 15
r7 38 37 15
rc1 7 30 200
rc2 7 39 200
q1 30 3 36 qn
q2 39 2 38 qna
ediff 33 0 39 30 1
rdiff 33 0 1 Meg
*
* Compensation Section
*
ga 0 34 33 0 2m
rh 34 0 500K
ch 34 0 0.4 pF
rc 34 40 50
cc 40 0 0.05 pF
*
* Poles
*
ep 41 0 40 0 1
rpa 41 42 250
cpa 42 0 0.8 pF
rpb 42 43 50
cpb 43 0 0.5 pF
*
* Output Stage
*
ios1 7 50 3.0mA
ios2 51 4 3.0mA
q3 4 43 50 qp
q4 7 43 51 qn
q5 7 50 52 qn
q6 4 51 53 qp
ros1 52 6 2
ros2 6 53 2
*
* Power Supply Current
*
ips 7 4 11.4mA
*
* Models
*
.model qna npn(is800e-18 bf170 tf0.2ns)
.model qn npn(is810e-18 bf200 tf0.2ns)
.model qp pnp(is800e-18 bf200 tf0.2ns)
.ends
8