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| (R) CT RODU MENT ETE P REPLACE ter at SOL ED OB rt Cen m/tsc MEND uppo ECOM echnical S .intersil.co NO R our Sheetwww Data T or September 1996, Rev. A ct conta INTERSIL 1-888 EL2344 FN7154 Triple Low-Power 60MHz Unity-Gain Stable Op Amp The EL2344 is a triple version of the popular EL2044. It is a high speed, low power, low cost monolithic operational amplifier built on Elantec's proprietary complementary bipolar process. The EL2344 is unity-gain stable and feature a 325V/s slew rate and 60MHz gain-bandwidth product while requiring only 5.2mA of supply current per amplifier. The power supply operating range of the EL2344 is from 18V down to as little as 2V. For single-supply operation, the EL2344 operates from 36V down to as little as 2.5V. The excellent power supply operating range of the EL2344 makes it an obvious choice for applications on a single +5V or +3V supply. The EL2344 also features an extremely wide output voltage swing of 13.6V with VS = 15V and RL = 1000. 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 EL2344 has a -3dB bandwidth of 120MHz with a phase margin of 50. It can drive unlimited load capacitance, and because of its conventional voltagefeedback topology, the EL2344 allows the use of reactive or non-linear elements in their feedback network. This versatility combined with low cost and 75mA of outputcurrent drive makes the EL2344 an ideal choice for pricesensitive applications requiring low power and high speed. Features * 60MHz 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 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 * Stable with unlimited capacitive load * Wide output voltage swing - 13.6V with VS = 15V, RL = 1000 - 3.8V/0.3V with VS = +5V, RL = 500 * Low cost, enhanced replacement for the AD827 and LT1229/LT1230 Applications * Video amplifier * Single-supply amplifier * Active filters/integrators * High-speed sample-and-hold * High-speed signal processing Pinout EL2344 14-PIN PDIP, SO TOP VIEW * ADC/DAC buffer * Pulse/RF amplifier * Pin diode receiver * Log amplifier * Photo multiplier amplifier * Difference amplifier Ordering Information PART NUMBER EL2344CN EL2344CS TEMP. RANGE -40C to +85C -40C to +85C PACKAGE 14-Pin PDIP 14-Pin SO PKG. NO. MDP0031 MDP0027 1 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. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners. EL2344 Absolute Maximum Ratings (TA = 25 C) Supply Voltage (VS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V or 36V Peak Output Current (IOP) . . . . . . . . . . . . . . .Short-Circuit Protected Output Short-Circuit Duration (Note 1) . . . . . . . . . . . . . . . . . Infinite Input Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS Differential Input Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . .10V 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 = 1000, unless otherwise specified. CONDITION VS = 15V TEMP 25C TMIN, TMAX MIN TYP 0.5 MAX 12.0 17.0 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 UNITS 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 (Note 1) VS = 15V All 25C TMIN, TMAX VS = 5V IOS Input Offset Current VS = 15V 25C 25C TMIN, TMAX VS = 5V TCIOS AVOL Average Offset Current Drift Open-Loop Gain VS = 15V,VOUT = 10V, RL = 1000 VS = 5V, VOUT = 2.5V, RL = 500 VS = 5V, VOUT = 2.5V, RL = 150 PSRR Power Supply Rejection Ratio VS = 5V to 15V 25C All 25C TMIN, TMAX 25C 25C 25C TMIN, TMAX 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 = 1000 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 2 EL2344 DC Electrical Specifications PARAMETER IS VS = 15V, RL = 1000, 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 Power-Supply Operating Range AV = +1@ 10MHz AV = +1 Dual-Supply Single-Supply NOTE: 1. Measured from TMIN to TMAX. 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 UNITS mA mA mA k M pF m V V DESCRIPTION Supply Current (Per Amplifier) 3 EL2344 Closed-Loop AC Electrical Specifications PARAMETER BW DESCRIPTION -3dB Bandwidth (VOUT = 0.4VPP) VS = 15V, AV = +1, RL = 1000 unless otherwise specified. CONDITION 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 CS SR Phase Margin Channel Separation Slew Rate (Note 1) RL = 1k, CL = 10pF f = 5MHz VS = 15V, RL = 1000 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) VS = 15V, 10V Step VS = 5V, 5V Step dG dP eN iN CI STAB 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 back-terminated 75 load. For other values of RL, see curves. Differential Gain (Note 3) Differential Phase (Note 3) Input Noise Voltage Input Noise Current Load Capacitance Stability NTSC/PAL NTSC/PAL 10kHz 10kHz AV = +1 0.1V Step 0.1V Step TEMP 25C 25C 25C 25C 25C 25C 25C 25C 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 85 325 200 5.2 12.7 3.0 20 2.5 80 60 0.04 0.15 15.0 1.50 Infinite MAX UNITS MHz MHz MHz MHz MHz MHz MHz MHz dB V/s V/s MHz MHz ns % ns ns ns % nH/Hz pA/Hz pF 4 EL2344 Typical Performance Curves Non-Inverting Frequency Response TA = 25C, RL = 1000, AV = +1 unless otherwise specified. 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 Closed-Loop 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 5 EL2344 Typical Performance Curves Gain-Bandwidth Product vs Supply Voltage TA = 25C, RL = 1000, AV = +1 unless otherwise specified. (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 6 EL2344 Typical Performance Curves Short-Circuit Current vs Temperature TA = 25C, RL = 1000, AV = +1 unless otherwise specified. (Continued) Gain-Bandwidth Product vs Load Capacitance Overshoot vs Load Capacitance Small-Signal Step Response 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 Differential Gain and Phase vs Number of 150 Loads at 4.43MHz 7 EL2344 Typical Performance Curves 14-Pin Plastic DIP Maximum Power Dissipation vs Ambient Temperature TA = 25C, RL = 1000, AV = +1 unless otherwise specified. (Continued) 14-Pin SO Maximum Power Dissipation vs Ambient Temperature Channel Separation vs Frequency Simplified Schematic (Per Amplifier) Burn-In Circuit (Per Amplifier) Applications Information Product Description The EL2344 is a low-power wideband monolithic operational amplifier built on Elantec's proprietary high-speed complementary bipolar process. The EL2344 uses 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 EL2344 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 EL2344 is All Packages Use the Same Schematic 8 EL2344 an excellent choice for applications such as fast log amplifiers. 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 EL2344 still has 1V of output swing. Power Dissipation With the wide power supply range and large output drive capability of the EL2344, it is possible to exceed the 150C maximum junction temperatures under certain load and power-supply conditions. It is therefore important to calculate the maximum junction temperature (TJmax) for all applications to determine if power supply voltages, load conditions, or package type need to be modified for the EL2344 to remain in the safe operating area. These parameters are related as follows: TJMAX = TMAX + (JA* (PDmaxtotal)) 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*ISMAX+(VS-VOUTMAX)*(VOUTMAX/RL)) where: * TMAX = Maximum Ambient Temperature * JA = Thermal Resistance of the Package * PDMAX = Maximum Power Dissipation of 1 Amplifier * VS = Supply Voltage * ISMAX = Maximum Supply Current of 1 Amplifier * VOUTMAX = Maximum Output Voltage Swing of the 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 cabledriver below since we know that TJMAX = 150C, TMAX = 75C, ISMAX = 7.6mA, and the package JAs are shown in Table 1. If we assume (for this example) that we are driving a back-terminated video cable, then the maximum average value (over duty-cycle) of VOUTMAX is 1.4V, and RL = 150, giving the results seen in Table 1. TABLE 1 PACKAGE EL2344CN EL2344CS PDIP14 SO14 JA 70C/W 110C/W MAX PDISS @ TMAX 1.071W @ 75C 0.682W @ 75C MAX VS 11.5V 7.5V Gain-Bandwidth Product and the -3dB Bandwidth The EL2344 has a gain-bandwidth product of 60MHz 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-bandwidth product divided by the noise gain of the circuit. For gains less than 4, higherorder poles in the amplifiers' transfer function contribute to even higher closed loop bandwidths. For example, the EL2344 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 EL2344 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 EL2344 in a gain of +1 only exhibits 1.0dB of peaking with a 1000 load. Video Performance An industry-standard method of measuring the video distortion of components such as the EL2344 is to measure the amount of differential gain (dG) and differential phase (dP) that they introduce. To make these measurements, a 0.286VPP (40IRE) signal is applied to the device with 0V DC offset (0IRE) at either 3.58MHz for NTSC or 4.43MHz for PAL. A second measurement is then made at 0.714V DC offset (100IRE). 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 EL2344 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 EL2344 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 EL2344 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. Single-Supply Operation The EL2344 has been designed to have a wide input and output voltage range. This design also makes the EL2344 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 9 EL2344 Output Drive Capability The EL2344 has been designed to drive low impedance loads. It can easily drive 6VPP into a 150 load. This high output drive capability makes the EL2344 an ideal choice for RF, IF and video applications. Furthermore, the current drive of the EL2344 remains a minimum of 35mA at low temperatures. The EL2344 is current-limited 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. The EL2344 Macromodel This macromodel has been developed to assist the user in simulating the EL2344 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: TABLE 2. noise settling-time CMRR PSRR non-linearities temperature effects manufacturing variations Capacitive Loads For ease of use, the EL2344 has been designed to drive any capacitive load. However, the EL2344 remains stable by automatically reducing its 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. Series resistors at the output of the EL2344 can be used to reduce this peaking and further improve stability. Printed-Circuit Layout The EL2344 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. 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. 10 EL2344 EL2344 Macromodel (Continued) * Connections: +input * | -input * | | +Vsupply * | || -Vsupply * | || | output * | || | | .subckt M2344 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 * IN+IN+IN+IN+IN+IN+NININININ * 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 11 EL2344 EL2344 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 12 |
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