Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp Features General Description • 100MHz gain-bandwidth at gainof-2 • Gain-of-2 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 = 275V/µs • Fast settling = 80ns to 0.1% for a 10V step • Low differential gain = 0.02% at AV = +2, RL = 150Ω • Low differential phase = 0.07° at AV = +2, RL = 150Ω • Stable with unlimited capacitive load • Wide output voltage swing =±13.6V with VS = ±15V, RL = 1000Ω = 3.8V/0.3V with VS = +5V, RL = 500Ω The EL2245C/EL2445C are dual and quad versions of the popular EL2045C. They are high speed, low power, low cost monolithic operational amplifiers built on Elantec's proprietary complementary bipolar process. The EL2245C/EL2445C are gain-of-2 stable and feature a 275V/µs slew rate and 100MHz bandwidth at gain-of-2 while requiring only 5.2mA of supply current per amplifier. 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 The power supply operating range of the EL2245C/EL2445C is from ±18V down to as little as ±2V. For single-supply operation, the EL2245C/EL2445C operate from 36V down to as little as 2.5V. The excellent power supply operating range of the EL2245C/EL2445C makes them an obvious choice for applications on a single +5V or +3V supply. The EL2245C/EL2445C also feature an extremely wide output voltage swing of ±13.6V with VS = ±15V and RL = 1000Ω. At ±5V, output voltage swing is a wide ±3.8V with RL = 500Ω and ±3.2V with RL = 150Ω. Furthermore, for single-supply operation at +5V, output voltage swing is an excellent 0.3V to 3.8V with RL = 500Ω. At a gain of +2, the EL2245C/EL2445C have a -3dB bandwidth of 100MHz with a phase margin of 50°. They can drive unlimited load capacitance, and because of their conventional voltage-feedback topology, the EL2245C/EL2445C 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 EL2245C/EL2445C an ideal choice for price-sensitive applications requiring low power and high speed. Connection Diagrams EL2245CN/CS Dual EL2445CN/CS Quad Ordering Information Part No. Temp. Range Package Outline # EL2245CN -40°C to +85°C 8-Pin P-DIP MDP0031 EL2245CS -40°C to +85°C 8-Lead SO MDP0027 EL2445CN -40°C to +85°C 14-Pin P-DIP MDP0031 EL2445CS -40°C to +85°C 14-Lead SO 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. September 26, 2001 • • • • • • • • • • • EL2245C, EL2445C EL2245C, EL2445C EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp Absolute Maximum Ratings (T Supply Voltage (VS) Peak Output Current (IOP) Output Short-Circuit Duration A = 25°C) ±18V or 36V Short-Circuit Protected Infinite Differential Input Voltage (dVIN) Power Dissipation (PD) Operating Temperature Range (TA) Operating Junction Temperature (TJ) Storage Temperature (TST) A heat-sink is required to keep junction temperature below absolute maximum when an output is shorted. Input Voltage (VIN) ±VS ±10V See Curves 0°C to +75°C 150°C -65°C to +150°C 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, RL = 1000Ω, unless otherwise specified Parameter VOS Description Input Offset Voltage Condition Temp VS = ±15V Average Offset Voltage Drift [1] IB Input Bias VS = ±15V Current Input Offset Current Average Offset Current Drift AVOL Open-Loop Gain PSRR CMRR VOUT ISC IS 4.0 mV 6.0 mV All 10.0 25°C 2.8 VS = ±5V 25°C 2.8 VS = ±15V 25°C 50 TMIN, TMAX [1] VS = ±15V,VOUT = ±10V, RL = 1000Ω Unit µV/°C 8.2 µA 9.2 µA µA 300 nA 400 nA 25°C 50 nA All 0.3 nA/°C 25°C 1500 TMIN, TMAX 1500 3000 V/V V/V VS = ±5V, VOUT = ±2.5V, RL = 500Ω 25°C 2500 V/V VS = ±5V, VOUT = ±2.5V, RL = 150Ω 25°C 1750 V/V Power Supply Rejection Ratio VS = ±5V to ±15V 25°C 65 TMIN, TMAX 60 Common-Mode VCM = ±12V, VOUT = 0V 25°C 70 TMIN, TMAX 70 Rejection Ratio CMIR Max 0.5 TMIN, TMAX VS = ±5V TCIOS Typ TMIN, TMAX TCVOS IOS Min 25°C Common-Mode Input Range Output Voltage Swing dB dB 90 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 = 1000Ω 25°C ±13.4 ±13.6 V TMIN, TMAX ±13.1 VS = ±15V, RL = 500Ω 25°C ±12.0 ±13.4 V VS = ±5V, RL = 500Ω 25°C ±3.4 ±3.8 V VS = ±5V, RL = 150Ω 25°C ±3.2 V VS = +5V, RL = 500Ω 25°C 3.6/0.4 TMIN, TMAX 3.5/0.5 Output Short Circuit Current Supply Current (Per Amplifier) 80 VS = ±15V, No Load 25°C 40 TMIN, TMAX 35 25°C V 3.8/0.3 75 5.2 TMAX 25°C 2 mA mA TMIN VS = ±5V, No Load V V 5.0 7 mA 7.6 mA 7.6 mA mA DC Electrical Characteristics (Continued) VS = ±15V, RL = 1000Ω, unless otherwise specified Parameter RIN Description Input Resistance Condition Temp Min Typ Max Unit Differential 25°C 150 kΩ Common-Mode 25°C 15 MΩ CIN Input Capacitance AV = +1@ 10MHz 25°C 1.0 pF ROUT Output Resistance AV = +1 25°C 50 mΩ PSOR Power-Supply Operating Range Dual-Supply 25°C ±2.0 ±18.0 V Single-Supply 25°C 2.5 36.0 V 1. Measured from T MIN to TMAX. Closed-Loop AC Electrical Characteristics VS = ±15V, AV = +2, RL = 1000Ω unless otherwise specified Parameter BW GBWP Description -3dB Bandwidth (VOUT = 0.4VPP) Gain-Bandwidth Product Condition Temp Min Typ Max Unit VS = ±15V, A V = +2 25°C 100 MHz VS = ±15V, A V = -1 25°C 75 MHz VS = ±15V, A V = +5 25°C 20 MHz VS = ±15V, A V = +10 25°C 10 MHz VS = ±15V, A V = +20 25°C 5 MHz VS = ±5V, A V = +2 25°C 75 MHz VS = ±15V 25°C 200 MHz VS = ±5V 25°C 150 MHz PM Phase Margin RL = 1 kΩ, CL = 10pF 25°C 50 ° CS Channel Separation f = 5MHz 25°C 85 dB SR Slew Rate [1] VS = ±15V, RL = 1000Ω 25°C 275 V/µs VS = ±5V, RL = 500Ω 25°C 25°C 200 200 V/µs 4.4 MHz FPBW Full-Power Bandwidth [2] VS = ±15V VS = ±5V 25°C 12.7 MHz tr, tf Rise Time, Fall Time 0.1V Step 25°C 3.0 ns OS Overshoot 0.1V Step 25°C 20 % tPD Propagation Delay 25°C 2.5 ns ts Settling to +0.1% (AV = +1) VS = ±15V, 10V Step 25°C 80 ns VS = ±5V, 5V Step 25°C 60 ns NTSC/PAL 25°C 0.02 % NTSC/PAL 25°C 0.07 ° 15.0 nV√Hz [3] 3.2 dG Differential Gain dP Differential Phase eN Input Noise Voltage 10kHz 25°C iN Input Noise Current 10kHz 25°C 1.50 pA√Hz CI STAB Load Capacitance Stability AV = +1 25°C Infinite pF [3] 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/(2π * Vpeak). 3. Video Performance measured at VS = ±15V, AV = +2 with 2 times normal video level across RL = 150Ω. This corresponds to standard video levels across a back-terminated 75Ω load. For other values of RL, see curves. 3 EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp Test Circuit 4 Typical Performance Curves Non-Inverting Frequency Response Open-Loop Gain and Phase vs Frequency Inverting Frequency Response Output Voltage Swing vs Frequency Frequency Response for Various Load Resistances 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 EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp Gain-Bandwidth Product vs Supply Voltage 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 Output 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 Short-Circuit Current vs Temperature Gain-Bandwidth Product vs Load Capacitance Small-Signal Step Response Differential Gain and Phase vs DC Input Offset at 3.58MHz Differential Gain and Phase vs Number of 150Ω Loads at 4.43MHz Overshoot vs Load Capacitance Large-Signal Step Response Differential Gain and Phase vs DC Input Offset at 4.43MHz 8-Pin Plastic DIP Maximum Power Dissipation vs Ambient Temperature 7 Differential Gain and Phase vs Number of 150Ω Loads at 3.58MHz 8-Lead SO Maximum Power Dissipation vs Ambient Temperature EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp 14-Pin Plastic DIP Maximum Power Dissipation vs Ambient Temperature 14-Lead SO Maximum Power Dissipation vs Ambient Temperature Simplified Schematic (Per Amplifier) Burn-In Circuit (Per Amplifier) All Packages Use the Same Schematic 8 Channel Separation vs Frequency Applications Information Product Description V outmax =Maximum Output Voltage Swing of the Application The EL2245C/EL2445C are dual and quad low-power wideband monolithic operational amplifiers built on Elantec's proprietary high-speed complementary bipolar process. The EL2245C/EL2445C 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 EL2245C/EL2445C 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 EL2245C/EL2445C are an excellent choice for applications such as fast log amplifiers. 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 TJmax = 150°C, Tmax = 75°C, ISmax = 7.6mA, and the package θJAs 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 = 150Ω, giving the results seen in Table 1. Table 1 Duals Power Dissipation Package θJA Max PDiss @ Tmax Max VS EL2245CN PDIP8 95°C/W 0.789W @ 75°C ±16.6V EL2245CS SO8 150°C/W 0.500W @ 75°C ±10.7V EL2445CN PDIP14 70°C/W 1.071W @ 75°C ±11.5V EL2445CS SO14 110°C/W 0.682W @ 75°C ±7.5V QUADS With the wide power supply range and large output drive capability of the EL2245C/EL2445C, 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 (TJmax) for all applications to determine if power supply voltages, load conditions, or package type need to be modified for the EL2245C/EL2445C to remain in the safe operating area. These parameters are related as follows: Single-Supply Operation The EL2245C/EL2445C have been designed to have a wide input and output voltage range. This design also makes the EL2245C/EL2445C an excellent choice for single-supply operation. Using a single positive supply, the lower input voltage range is within 100mV of ground (R L = 500Ω), and the lower output voltage range is within 300 mV of ground. Upper input voltage range reaches 4.2V, and output voltage range reaches 3.8V with a 5V supply and RL = 500Ω. 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 EL2245C/EL2445C still have 1V of output swing. TJmax = Tmax + (θJA* (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 Gain-Bandwidth Product and the -3dB Bandwidth θJA =Thermal Resistance of the Package PDmax =Maximum Power Dissipation of 1 Amplifier The EL2245C/EL2445C have a bandwidth at gain-of-2 of 100MHz 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- VS =Supply Voltage ISmax =Maximum Supply Current of 1Amplifier 9 EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp 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. 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 EL2245C/EL2445C have 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 EL2245C/EL2445C 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 EL2245C/EL2445C in a gain of +2 only exhibit 1.0dB of peaking with a 1000Ω load. Output Drive Capability The EL2245C/EL2445C have been designed to drive low impedance loads. They can easily drive 6VPP into a 150Ω load. This high output drive capability makes the EL2245C/EL2445C an ideal choice for RF, IF and video applications. Furthermore, the current drive of the EL2245C/EL2445C remains a minimum of 35mA at low temperatures. The EL2245C/EL2445C 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. Video Performance An industry-standard method of measuring the video distortion of components such as the EL2245C/ EL2445C 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. Capacitive Loads For ease of use, the EL2245C/EL2445C have been designed to drive any capacitive load. However, the EL2245C/EL2445C 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 EL2245C/EL2445C can be used to reduce this peaking and further improve stability. For signal transmission and distribution, a back-terminated cable (75Ω in series at the drive end, and 75Ω 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 EL2245C/EL2445C 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 150Ω, with standard video test levels at the input, the EL2245C/EL2445C exhibit 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 EL2245C/EL2445C has been Printed-Circuit Layout The EL2245C/EL2445C 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 10 tor (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. 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 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 model does not simulate these characteristics accurately: The EL2245C/EL2445C Macromodel This macromodel has been developed to assist the user in simulating the EL2245C/EL2445C with surrounding circuitry. It has been developed for the PSPICE simula- noise non-linearities settling-time temperature effects CMRR manufacturing variations PSRR 11 EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C/EL2445C Macromodel * Connections: +input * | -input * | | +Vsupply * | | | -Vsupply * | | | | output * | | | | | .subckt M2245 3 2 7 4 6 * * Input stage * ie 7 37 1mA 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 1.3pF 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 12 EL2245C/EL2445C Macromodel EL2245C/EL2445C Model 13 EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp EL2245C, EL2445C EL2245C, EL2445C Dual/Quad Low-Power 100MHz Gain-of-2 Stable Op Amp 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. September 26, 2001 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 support 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. 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 14 Printed in U.S.A.