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EL2044
Data Sheet August 16, 2004 FN7029.1
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/s 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 = 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. 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. The EL2044 is available in the 8-pin SO and 8-pin PDIP packages and operates over the full -40C to +85C temperature range.
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/s * Fast settling - 80ns to 0.1% for a 10V step * Low differential gain - 0.04% at AV = +2, RL = 150 * Low differential phase - 0.15 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 * Low cost, enhanced replacement for the AD847 and LM6361
Applications
* Video amplifiers * Single-supply amplifiers * Active filters/integrators * High speed sample-and-hold * High speed signal processing * ADC/DAC buffers * Pulse/RF amplifiers * Pin diode receivers * Log amplifiers * Photo multiplier amplifiers
Ordering Information
PART NUMBER EL2044CS EL2044CSZ (See Note) EL2044CS-T7 EL2044CSZ-T7 (See Note) EL2044CS-T13 EL2044CSZT13 (See Note) EL2044CN PACKAGE 8-Pin SO 8-Pin SO (Pb-free) 8-Pin SO 8-Pin SO (Pb-free) 8-Pin SO 8-Pin SO (Pb-free) 8-Pin PDIP TAPE & REEL 7" 7" 13" 13" PKG. DWG. # MDP0027 MDP0027 MDP0027 MDP0027
* Difference amplifiers
Pinout
EL2044 (8-PIN SO & 8-PIN PDIP) TOP VIEW
NC 1 8 NC 7 V+ 6 OUT 5 NC
MDP0027 MDP0027 MDP0031
IN- 2 IN+ 3 V- 4 +
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.
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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 (c) 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 = 25C)
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) . . . . . . . . . . . . .-40C to +85C Operating Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . +150C Storage Temperature (TST). . . . . . . . . . . . . . . . . . .-65C to +150C
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 Input Offset Voltage
VS = 15V, RL = 1k, unless otherwise specified. CONDITION VS = 15V TEMP 25C TMIN, TMAX MIN TYP 0.5 MAX 7.0 13.0 10.0 2.8 8.2 11.2 2.8 50 300 500 50 0.3 800 600 1200 1000 65 60 70 70 14.0 4.2 4.2/0.1 13.4 13.1 12.0 3.4 13.4 3.8 3.2 3.6/0.4 3.5/0.5 40 35 75 3.8/0.3 13.6 90 80 1500 UNIT mV mV V/C A A A nA nA nA nA/C V/V V/V V/V V/V dB dB dB dB V V V V V V V V V V mA mA
DESCRIPTION
TCVOS IB
Average Offset Voltage Drift Input Bias Current VS = 15V
All 25C TMIN, TMAX VS = 5V 25C 25C TMIN, TMAX VS = 5V 25C All 25C TMIN, TMAX VS = 5V, VOUT = 2.5V, RL = 500 VS = 5V, VOUT = 2.5V, RL = 150 25C 25C 25C TMIN, TMAX
IOS
Input Offset Current
VS = 15V
TCIOS AVOL
Average Offset Current Drift Open-loop Gain
(Note 1) VS = 15V,VOUT = 10V, RL = 1k
PSRR
Power Supply Rejection Ratio
VS = 5V to 15V
CMRR
Common-mode Rejection Ratio VCM = 12V, VOUT = 0V
25C TMIN, TMAX
CMIR
Common-mode Input Range
VS = 15V VS = 5V VS = +5V
25C 25C 25C 25C TMIN, TMAX
VOUT
Output Voltage Swing
VS = 15V, RL = 1k
VS = 15V, RL = 500 VS = 5V, RL = 500 VS = 5V, RL = 150 VS = +5V, RL = 500
25C 25C 25C 25C TMIN, TMAX
ISC
Output Short Circuit Current
25C TMIN, TMAX
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EL2044
DC Electrical Specifications
PARAMETER IS Supply Current VS = 15V, RL = 1k, unless otherwise specified. (Continued) CONDITION VS = 15V, no load TEMP 25C TMIN, TMAX VS = 5V, no load RIN Input Resistance Differential Common-mode CIN ROUT PSOR Input Capacitance Output Resistance AV = +1 @10MHz AV = +1 25C 25C 25C 25C 25C 25C 25C 2.0 2.5 5.0 150 15 1.0 50 18.0 36.0 MIN TYP 5.2 MAX 7 7.6 UNIT mA mA mA k M pF m V V
DESCRIPTION
Power-supply Operating Range Dual-supply Single-supply
NOTE: 1. Measured from TMIN to TMAX.
Closed-Loop AC Electrical Specifications
PARAMETER BW DESCRIPTION
VS = 15V, AV = +1, RL = 1k unless otherwise specified. CONDITION TEMP 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 4.0 250 MIN TYP 120 60 60 12 6 80 60 45 50 325 200 5.2 12.7 3.0 20 2.5 80 60 25C 25C 25C 25C 0.04 0.15 15.0 1.50 MAX UNIT MHz MHz MHz MHz MHz MHz MHz MHz V/s V/s MHz MHz ns % ns ns ns % nV/Hz pA/Hz
-3dB Bandwidth (VOUT = 0.4VPP) VS = 15V, AV = +1 VS = 15V, AV = -1 VS = 15V, AV = +2 VS = 15V, AV = +5 VS = 15V, AV = +10 VS = 5V, AV = +1
GBWP
Gain-bandwidth Product
VS = 15V VS = 5V
PM SR
Phase Margin Slew Rate (Note 1)
RL = 1 k, CL = 10 pF VS = 15V, RL = 1k VS = 5V, RL = 500
FPBW
Full-power Bandwidth (Note 2)
VS = 15V VS = 5V
tR, tF OS tPD tS
Rise Time, Fall Time Overshoot Propagation Delay Settling to +0.1% (AV = +1)
0.1V Step 0.1V Step
VS = 15V, 10V step VS = 5V, 5V step
25C
dG dP eN iN NOTES:
Differential Gain (Note 3) Differential Phase Input Noise Voltage Input Noise Current
NTSC/PAL NTSC/PAL 10kHz 10kHz
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 / (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 back-terminated 75 load. For other values of RL, see curves.
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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
CMRR, PSRR and ClosedLoop Output Resistance vs Frequency
2nd and 3rd Harmonic Distortion vs Frequency
Settling Time vs Output Voltage Change
Supply Current vs Supply Voltage
Common-Mode Input Range vs Supply Voltage
Output Voltage Range vs Supply Voltage
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EL2044 Typical Performance Curves
Gain-Bandwidth Product vs Supply Voltage
(Continued)
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
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EL2044 Typical Performance Curves
Short-Circuit Current vs Temperature
(Continued)
Small-Signal Step Response Short-Circuit Current Large-Signal
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
Differential Gain and Phase vs Number of 150 Loads at 4.43MHz 70 Gain-Bandwidth Product (MHz) 60 50 40 30 20 10 0
Gain-Bandwidth Product vs Load Capacitance
VS=15V AV=-2 1 10 100 Load Capacitance (pF) 1k 10k
Overshoot vs Load Capacitance 35 30 Power Dissipation (W) 25 20 15 10 5 0 5 VS=15V RG=open 10 15 20 25 30 35 1.4
Package Power Dissipation vs Ambient Temperature JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board
1.2 1.25W 1 0.8 0.6 0.4 0.2 0 0 25 781mW
Overshoot (%)
JA =
PD IP 8 10 0 C/ W
SO 8 60 C /W
J
A =1
50
75 85 100
125
150
Load Capacitance (pF)
Ambient Temperature (C)
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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 = 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
EL2044
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 EL2044 still has 1V of output swing. 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 150 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.
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 1k load.
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 0.1F 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 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.
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 (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 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 150, 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
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
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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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