T T DUC PRO ACE MEN at E T L r LE P e O E t n S R OB rt Ce c D ED MEN al Suppo il.com/ts M O s C ic r E e n t R h O NData r Te c or www.in ct ouSheet L conta -INTE RS I 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