Datasheet EL2444CS, EL2444CN, EL2444CM, EL2244CS, EL2244CN Datasheet (ELANT)

Page 1
EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
Features
• 120MHz gain-bandwidth product
• Unity-gain stable
• Low supply current (per amplifier)
- 5.2mA at VS = ±15V
• Wide supply range - ±2V to ±18V dual-supply, 2.5V to 36V single­supply
• High slew rate - 325V/µs
• Fast settling - 80ns to 0.1% for a 10V step
• Low differential gain - 0.04% at AV=+2, RL = 150¾
• Low differential phase - 0.15° at AV = +2, R
= 150
L
• Stable w/ unlimited capacitive load
• Wide output voltage swing ­±13.6V with VS = ±15V, RL =
1000Ω, 3.8V/0.3V with V
R
= 500
L
= +5V,
S
• Low cost, enhanced replacement for the AD827 andLT1229/LT1230
Applications
• Video amplifier
• Single-supply amplifier
• Active filters/integrators
• High-speed sample-and-hold
• High-speed signal processing
• ADC/DAC buffer
• Pulse/RF amplifier
• Pin diode receiver
• Log amplifier
• Photo multiplier amplifier
• Difference amplifier
General Description
The EL2244C/EL2444C are dual and quad versions of the popular EL2044C. They are high speed, low power, low cost monolithic oper­ational amplifiers built on Elantec's proprietary complementary bipolar process. The EL2244C/EL2444C are unity-gain stable and feature a 325V/µs slew rate and 120MHz gain-bandwidth product while requiring only 5.2mA of supply current per amplifier.
The power supply operating range of the EL2244C/EL2444C is from ±18V down to as little as ±2V. For single-supply operation, the EL2244C/EL2444C operate from 36V down to as little as 2.5V. The excellent power supply operating range of the EL2244C/EL2444C makes them an obvious choice for applications on a single +5V or +3V supply.
The EL2244C/EL2444C also feature an extremely wide output volt­age swing of ±13.6V with VS = ±15V and R output voltage swing is a wide ±3.8V with R R
= 150. Furthermore, for single-supply operation at +5V, output
L
voltage swing is an excellent 0.3V to 3.8V with R
= 1000. At ±5V,
L
= 500 and ±3.2V with
L
= 500Ω.
L
At a gain of +1, the EL2244C/EL2444C have a -3dB bandwidth of 120MHz with a phase margin of 50°. They can drive unlimited load capacitance, and because of their conventional voltage-feedback topology, the EL2244C/EL2444C allow the use of reactive or non-lin­ear elements in their feedback network. This versatility combined with low cost and 75mA of output-current drive make the EL2244C/EL2444C an ideal choice for price-sensitive applications requiring low power and high speed.
Connection Diagrams
EL2244CN/CS
Dual
EL2444CN/CS
Quad
September 26, 2001
Ordering Information
Part No. Temp. Range Package Outline #
EL2244CN -40°C to +85°C 8-Pin P-DIP MDP0031
EL2244CS -40°C to +85°C 8-Lead SO MDP0027
EL2444CN -40°C to +85°C 14-Pin P-DIP MDP0031
EL2444CS -40°C to +85°C 14-Lead SO MDP0027
EL2444CM -40°C to +85°C 16-Lead SOL MDP0027
Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
© 2001 Elantec Semiconductor, Inc.
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
Absolute Maximum Ratings (T
Supply Voltage (VS) ±18V or 36V
Peak Output Current (IOP) Short-Circuit Protected
EL2244C, EL2444C
Output Short-Circuit Duration Infinite
A heat-sink is required to keep junction temperature below absolute maximum when an output is shorted.
Input Voltage (V
IN)
= 25 °C)
A
Differential Input Voltage (dVIN) ±10V
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
±V
S
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ 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 Characteristics
VS = ±15V, R
Parameter Description Condition Temp Min Typ Max Unit
V
OS
TCV
I
B
I
OS
TCI
A
VOL
PSRR Power Supply
CMRR Common-Mode
CMIR Common-Mode
V
OUT
I
SC
I
S
= 1000, unless otherwise specified
L
Input Offset
Voltage
Average Offset Voltage Drift
OS
Input Bias
Current
Input Offset
Current
Average Offset Current Drift
OS
Open-Loop Gain VS = ±15V,V
Rejection Ratio
Rejection Ratio
Input Range
Output Voltage
Swing
Output Short
Circuit Current
Supply Current
(Per Amplifier)
VS = ±15V 25°C 0.5 4.0 mV
T
, T
MIN
[1]
MAX
All 10.0 µV/°C
9.0 mV
VS = ±15V 25°C 2.8 8.2 µA
T
MIN
, T
MAX
11.2 µA
VS = ±5V 25°C 2.8 µA
VS = ±15V 25°C 50 300 nA
T
, T
MIN
VS = ±5V 25°C 50 nA
[1]
VS = ±5V, V
VS = ±5V, V
OUT
= ±2.5V, R
OUT
= ±2.5V, R
OUT
= ±10V, R
= 1000 25°C 800 1500 V/V
L
= 500 25°C 1200 V/V
L
= 150 25°C 1000 V/V
L
MAX
All 0.3 nA/°C
T
MIN
, T
MAX
600 V/V
500 nA
VS = ±5V to ±15V 25°C 65 80 dB
T
VCM = ±12V, V
, T
MIN
= 0V 25°C 70 90 dB
OUT
MAX
T
, T
MIN
MAX
60 dB
70 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, R
VS = ±15V, R
VS = ±5V, R
VS = ±5V, R
VS = +5V, R
= 1000 25°C ±13.4 ±13.6 V
L
= 500 25°C ±12.0 ±13.4 V
L
= 500 25°C ±3.4 ±3.8 V
L
= 150 25°C ±3.2 V
L
= 500 25°C 3.6/0.4 3.8/0.3 V
L
T
, T
MIN
T
, T
MIN
±13.1 V
MAX
3.5/0.5 V
MAX
25°C 40 75 mA
T
MIN
, T
MAX
35 mA
VS = ±15V, No Load 25°C 5.2 7 mA
T
T
MIN
MAX
7.6 mA
7.6 mA
VS = ±5V, No Load 25°C 5.0 mA
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
DC Electrical Characteristics (Continued)
VS = ±15V, R
Parameter Description Condition Temp Min Typ Max Unit
R
IN
C
IN
R
OUT
PSOR Power-Supply
1. Measured from T
= 1000, unless otherwise specified
L
Input Resistance Differential 25°C 150 k
Common-Mode 25°C 15 M
Input Capacitance AV = +1@ 10MHz 25°C 1.0 pF
Output Resistance A
Operating Range
to T
MAX
.
MIN
= +1 25°C 50 m
V
Dual-Supply 25°C ±2.0 ±18.0 V
Single-Supply 25°C 2.5 36.0 V
EL2244C, EL2444C
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
Closed-Loop AC Electrical Characteristics
VS = ±15V, AV = +1, R
EL2244C, EL2444C
Parameter Description Condition Temp Min Typ Max Unit
BW -3dB Bandwidth
GBWP Gain-Bandwidth Product VS = ±15V 25°C 60 MHz
PM Phase Margin RL = 1 k¾, CL = 10pF 25°C 50 °
CS Channel Separation f = 5MHz 25°C 85 dB
SR Slew Rate
FPBW Full-Power Bandwidth
tr, t
f
OS Overshoot 0.1V Step 25°C 20 %
t
PD
t
s
dG Differential Gain
dP Differential Phase eN Input Noise Voltage 10kHz 25°C 15.0 nVHz iN Input Noise Current 10kHz 25°C 1.50 pAHz
CI STAB Load Capacitance Stability AV = +1 25°C Infinite pF
1. Slew rate is measured on rising edge
2. For VS = ±15V, V Vpeak).
3. Video Performance measured at VS = ±15V, AV = +2 with 2 times normal video level across R across a back-terminated 75 load. For other values of R
= 1000 unless otherwise specified
L
(V
= 0.4VPP)
OUT
[1]
[2]
Rise Time, Fall Time 0.1V Step 25°C 3.0 ns
Propagation Delay 25°C 2.5 ns
Settling to +0.1%
(AV = +1)
[3]
[3]
= 20VPP. For VS = ±5V, V
OUT
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 = ±5V 25°C 45 MHz
VS = ±15V, R
VS = ±5V, R
VS = ±15V 25°C 4.0 5.2 MHz
VS = ±5V 25°C 12.7 MHz
VS = ±15V, 10V Step 25°C 80 ns
VS = ±5V, 5V Step 25°C 60 ns
NTSC/PAL 25°C 0.04 %
NTSC/PAL 25°C 0.15 °
OUT
= 1000 25°C 250 325 V/µs
L
= 500 25°C 200 V/µs
L
= 5V
. Full-power bandwidth is based on slew rate measurement using: FPBW = SR/(2π *
PP
= 150. This corresponds to standard video levels
, see curves.
L
L
4
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Typical Performance Curves
EL2244C, EL2444C
EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
Non-Inverting Frequency Response
Open-Loop Gain and Phase vs Frequency
CMRR, PSRR and Closed-Loop Output Resistance vs Frequency
Inverting Frequency Response
Output Voltage Swing vs Frequency
2nd and 3rd Harmonic Distortion vs Frequency
Frequency Response for Various Load Resistances
Equivalent Input Noise
Settling Time vs Output Voltage Change
Supply Current vs Supply Voltage
Common-Mode Input Range vs Supply Voltage
5
Output Voltage Range vs Supply Voltage
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
Gain-Bandwidth Product vs Supply Voltage
Bias and Offset Current vs Input Common-Mode Voltage
Offset Voltage vs Temperature
Open-Loop Gain vs Supply Voltage
Open-Loop Gain vs Load Resistance
Bias and Offset Current vs Temperature
Slew-Rate vs Supply Voltage
Voltage Swing vs Load Resistance
Supply Current vs Temperature
Gain-Bandwidth Product vs Temperature
Open-Loop Gain, PSRR and CMRR vs Temperature
6
Slew Rate vs Temperature
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
Short-Circuit Current vs Temperature
Differential Gain and Phase vs DC Input Offset at 3.58MHz
Small-Signal Step Response
Gain-Bandwidth Product vs Load Capacitance
Differential Gain and Phase vs DC Input Offset at 4.43MHz
Large-Signal Step Response
Overshoot vs Load Capacitance
Differential Gain and Phase vs Number of 150¾ Loads at 3.58MHz
Differential Gain and Phase vs Number of 150¾ Loads at 4.43MHz
8-Pin Plastic DIP Maximum Power Dissipation vs Ambient Temperature
7
8-Lead SO Maximum Power Dissipation vs Ambient Temperature
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
14-Pin Plastic DIP Maximum Power Dissipation
EL2244C, EL2444C
vs Ambient Temperature
Simplified Schematic (Per Amplifier)
14-Lead SO Maximum Power Dissipation vs Ambient Temperature
Channel Separation vs Frequency
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Burn-In Circuit (Per Amplifier)
EL2244C, EL2444C
EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
All Packages Use the Same Schematic
9
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
Applications Information
Product Description
EL2244C, EL2444C
The EL2244C/EL2444C are low-power wideband monolithic operational amplifiers built on Elantec's pro­prietary high-speed complementary bipolar process. The EL2244C/EL2444C use a classical voltage-feedback topology which allows them 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 EL2244C/EL2444C 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 ability to use diodes in the feedback network, the EL2244C/EL2444C are an excellent choice for applications such as fast log amplifiers.
Power Dissipation
With the wide power supply range and large output drive capability of the EL2244C/EL2444C, it is possible to exceed the 150°C maximum junction temperatures under certain load and power-supply conditions. It is therefore important to calculate the maximum junction temperature (T power supply voltages, load conditions, or package type need to be modified for the EL2244C/EL2444C to remain in the safe operating area. These parameters are related as follows:
T
= T
Jmax
max
where PDmaxtotal is the sum of the maximum power dissipation of each amplifier in the package (PDmax). PDmax for each amplifier can be calculated as follows:
PDmax= (2*VS*I
where:
T
=Maximum Ambient Temperature
max
θ
=Thermal Resistance of the Package
JA
PDmax =Maximum Power Dissipation of 1Amplifier
VS =Supply Voltage
I
=Maximum Supply Current of 1 Amplifier
Smax
) for all applications to determine if
Jmax
+ (θ
(PDmaxtotal))
JA*
Smax
+(VS-V
outmax
)*(V
outmax/RL
V
=Maximum Output Voltage Swing of the
outmax
Application
RL =Load Resistance
To serve as a guide for the user, we can calculate maxi­mum allowable supply voltages for the example of the video cable-driver below since we know that T 150°C, T
θ
s are shown in Table 1. If we assume (for this exam-
JA
= 75°C, I
max
= 7.6mA, and the package
Smax
Jmax
=
ple) that we are driving a back-terminated video cable, then the maximum average value (over duty-cycle) of V
is 1.4V, and RL = 150¾, giving the results seen
outmax
in Table 1.
Table 1
Duals Package θ
EL2244CN PDIP8 95°C/W 0.789W @ 75°C ±16.6V
EL2244CS SO8 150°C/W 0.500W @ 75°C ±10.7V
QUADS
EL2444CN PDIP14 70°C/W 1.071W @ 75°C ±11.5V
EL2444CS SO14 110°C/W 0.682W @ 75°C ±7.5V
Single-Supply Operation
The EL2244C/EL2444C have been designed to have a wide input and output voltage range. This design also makes the EL2244C/EL2444C an excellent choice for single-supply operation. Using a single positive supply, the lower input voltage range is within 100mV of ground (R
= 500), and the lower output voltage range is
L
within 300 mV of ground. Upper input voltage range reaches 4.2V, and output voltage range reaches 3.8V with a 5V supply and R
= 500. This results in a 3.5V
L
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 EL2244C/EL2444C still have 1V of output swing.
Gain-Bandwidth Product and the-3dB Bandwidth
The EL2244C/EL2444C have a gain-bandwidth product of 120MHz while using only 5.2mA of supply current per amplifier. For gains greater than 4, their closed-loop
-3dB bandwidth is approximately equal to the gain-
JA
Max PDiss @ T
max
Max V
S
10
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
bandwidth product divided by the noise gain of the cir­cuit. For gains less than 4, higher-order poles in the amplifiers' transfer function contribute to even higher closed loop bandwidths. For example, the EL2244C/EL2444C have 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 EL2244C/EL2444C have 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 EL2244C/EL2444C in a gain of +1 only exhibit 1.0dB
of peaking with a 1000 load.
Video Performance
An industry-standard method of measuring the video distortion of components such as the EL2244C/ EL2444C is to measure the amount of differential gain (dG) and differential phase (dP) that they introduce. 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-termi-
nated 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 EL2244C/EL2444C have been designed as an eco­nomical solution for applications requiring low video distortion. They have 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 EL2244C/EL2444C exhibit 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 EL2244C/EL2444C 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.
Output Drive Capability
The EL2244C/EL2444C have been designed to drive low impedance loads. They can easily drive 6VPP into a 150¾ load. This high output drive capability makes the EL2244C/EL2444C an ideal choice for RF, IF and video applications. Furthermore, the current drive of the EL2244C/EL2444C remains a minimum of 35mA at low temperatures. The EL2244C/EL2444C are current­limited at the output, allowing it to withstand shorts to ground. However, power dissipation with the output shorted can be in excess of the power-dissipation capa­bilities of the package.
Capacitive Loads
For ease of use, the EL2244C/EL2444C have been designed to drive any capacitive load. However, the EL2244C/EL2444C remain stable by automatically reducing their gain-bandwidth product as capacitive load increases. Therefore, for maximum bandwidth, capacitive loads should be reduced as much as possible or isolated via a series output resistor (Rs). Similarly, coax lines can be driven, but best AC performance is obtained when they are terminated with their character­istic impedance so that the capacitance of the coaxial cable will not add to the capacitive load seen by the amplifier. Although stable with all capacitive loads, some peaking still occurs as load capacitance increases. A series resistor at the output of the EL2244C/EL2444C can be used to reduce this peaking and further improve stability.
Printed-Circuit Layout
The EL2244C/EL2444C are 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
11
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
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
EL2244C, EL2444C
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 EL2244C/EL2444C Macromodel
This macromodel has been developed to assist the user in simulating the EL2244C/EL2444C 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 non-linearities
settling-time temperature effects
CMRR manufacturing variations
PSRR
12
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Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C/EL2444 Macromodel
* Connections: +input * | -input * | | +Vsupply * | | | -Vsupply * | | | | output * | | | | | .subckt M2244 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 * * 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
EL2244C, EL2444C
EL2244C, EL2444C
13
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C/EL2444C Macromodel
EL2244C, EL2444C
EL2244C/EL2444C Model
14
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
15
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EL2244C, EL2444C
Dual/Quad Low-Power 120MHz Unity-Gain Stable Op Amp
EL2244C, EL2444C
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir­cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec, Inc. products are not authorized for and should not be used within Life Support Systems without the specific written consent of Elantec, Inc. Life Support systems are equipment intended to sup-
Elantec Semiconductor, Inc.
675 Trade Zone Blvd. Milpitas, CA 95035 Telephone: (408) 945-1323
(888) ELANTEC Fax: (408) 945-9305 European Office: +44-118-977-6020 Japan Technical Center: +81-45-682-5820
port or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. Users con­templating application of Elantec, Inc. Products in Life Support Systems are requested to contact Elantec, Inc. factory headquarters to establish suitable terms & conditions for these applications. Elan­tec, Inc.’s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages.
September 26, 2001
16
Printed in U.S.A.
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