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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Features
* 200MHz gain-bandwidth product * Unity-gain stable * Ultra low video distortion = 0.01%/0.015 @ NTSC/PAL * Conventional voltage-feedback topology * Low offset voltage = 200V * Low bias current = 2A * Low offset current = 0.1A * Output current = 50mA over temperature * Fast settling = 13ns to 0.1% * Low distortion = -60dB HD2, ------70dB HD3 @ 20MHz, 2VPP, AV = +1
General Description
The EL2073C is a precision voltage-feedback amplifier featuring a 200MHz gain-bandwidth product, fast settling time, excellent differential gain and differential phase performance, and a minimum of 50mA output current drive over temperature. The EL2073C is unity-gain stable with a -3dB bandwidth of 400MHz. It has a very low 200V of input offset voltage, only 2A of input bias current, and a fully symmetrical differential input. Like all voltagefeedback operational amplifiers, the EL2073C allows the use of reactive or non-linear components in the feedback loop. This combination of speed and versatility makes the EL2073C the ideal choice for all op-amp applications 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 EL2073C an ideal amplifier for signal-processing and digitizing systems.
Applications
* * * * * * * * * High resolution video Active filters/integrators High-speed signal processing ADC/DAC buffers Pulse/RF amplifiers Pin diode receivers Log amplifiers Photo multiplier amplifiers High speed sample-and-holds
Ordering Information
Part No. EL2073CN EL2073CS Temp. Range -40C to +85C -40C to +85C Package 8-Pin P-DIP 8-Lead SO Outline # MDP0031 MDP0027
Connection Diagrams
DIP and SO Package
September 26, 2001
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.
(c) 2001 Elantec Semiconductor, Inc.
EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Absolute Maximum Ratings (T
Supply Voltage (VS) Output Current
A
= 25C)
7V
Thermal Resistance
Output is short-circuit protected to ground, however, maximum reliability is obtained if I OUT does not exceed 70mA.
Common-Mode Input Differential Input Voltage
VS 5V
JA = 95C/W P-DIP JA = 175C/W SO-8 Operating Temperature -40C to +85C Junction Temperature 175C Storage Temperature -60C to +150C Note: See EL2071/EL2171 for Thermal Impedance curves.
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.
Open Loop DC Electrical Characteristics
VS = 5V, RL = 100, unless otherwise specified Parameter VOS TCVOS IB IOS PSRR CMRR IS RIN (diff) CIN (diff) RIN (cm) CIN (cm) ROUT CMIR IOUT VOUT VOUT 100 VOUT 50 AVOL 100 Description Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Offset Current Power Supply Rejection Ratio Common Mode Rejection Ratio Supply Current--Quiescent RIN (Differential) CIN (Differential) RIN (Common-Mode) CIN (Common-Mode) Output Resistance Common-Mode Input Range Output Current Output Voltage Swing Output Voltage Swing Output Voltage Swing Open-Loop Gain No Load 100 50 100 VCM = 0V
[2]
Test Conditions VCM = 0V
[1]
Temp 25C TMIN, T MAX All 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C 25C 25C 25C 25C 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX 25C TMIN, T MAX
Min
Typ 0.2 8 2 2 0.1
Max 1.5 3
Unit mV mV V/C
6 6 1 2
A A A A dB dB dB dB
60 60 65 65
80 90 21 15 1 1 1 20 25 25
[3]
No Load Open-Loop Open-Loop
mA mA k pF M pF m V V mA mA V V V V V V/V V/V
3 2.5 50 50 3.5 3.5 3 3 3 2.5 500 400
3.5 70 4 3.6 3.4 1000
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Open Loop DC Electrical Characteristics (Continued)
VS = 5V, RL = 100, unless otherwise specified Parameter AVOL 50 eN@ > 1MHz iN@ > 100kHz Description Open-Loop Gain Noise Voltage 1-100MHz Noise Current 100k-100MHz Test Conditions 50 Temp 25C TMIN, TMAX 25C 25C Min 400 300 2.3 3.2 Typ 800 Max Unit V/V V/V nV/Hz pA/Hz
1. Measured from T MIN, TMAX. 2. VCC = 4.5V to 5.5V. 3. VIN = 2.5V, V OUT = 0V
Closed Loop AC Electrical Characteristics
VS = 5V, AV = +1, Rf = 0, RL = 100 unless otherwise specified Parameter SSBW Description -3dB Bandwidth (VOUT = 0.4VPP) Test Conditions AV = +1 AV = -1 AV = +2 AV = +5 AV = +10 GBWP LSBWa LSBWb GFPL GFPH GFR LPD PM tr1, tf1 tr2, tf2 ts1 ts2 OS SR DISTORTION HD2a HD2b HD2c HD3a HD3b HD3c Gain-Bandwidth Product -3dB Bandwidth -3dB Bandwidth Peaking (<50MHz) Peaking (>50MHz) Rolloff (<100MHz) Linear Phase Deviation (<100MHz) Phase Margin Rise Time, Fall Time Rise Time, Fall Time Settling to 0.1% (AV = -1) Settling to 0.01% (AV = -1) Overshoot Slew Rate
[2]
Temp 25C 25C 25C TMIN, TMAX 25C 25C 25C All All 25C TMIN, TMAX 25C TMIN, TMAX 25C TMIN, TMAX All 25C 25C 25C 25C 25C 25C All 25C 25C 25C TMIN, TMAX 25C 25C 25C TMIN, TMAX
Min 150 150 125
Typ 300 200 200 40 20 200
Max
Unit MHz MHz MHz MHz MHz MHz MHz MHz MHz
AV = +10 VOUT = 2VPP [1] VOUT = 5VPP [1] VOUT = 0.4VPP VOUT = 0.4VPP VOUT = 0.4VPP VOUT = 0.4VPP AV = +1 0.4V Step, AV = +2 5V Step, AV = +2 2V Step 2V Step 2V Step 2V Step @ 10MHz, A V = +2 @ 20MHz, A V = +1 @ 20MHz, A V = +2 @ 10MHz, A V = +2 @ 20MHz, A V = +1 @ 20MHz, A V = +2
50 11
85 16 0 1 0.1 1 60 2 15 13 25 5 0.5 0.5 3 3 0.5 0.5 1.8
dB dB dB dB dB dB ns ns ns ns % V/s
175
250 -65 -60 -55 -72 -70 -70 -55 -50 -50 -45 -60 -55 -60 -60
2nd Harmonic Distortion 2nd Harmonic Distortion 2nd Harmonic Distortion 3rd Harmonic Distortion 3rd Harmonic Distortion 3rd Harmonic Distortion
dBc dBc dBc dBc dBc dBc dBc dBc
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Closed Loop AC Electrical Characteristics
VS = 5V, AV = +1, Rf = 0, RL = 100 unless otherwise specified Parameter dG dP dG dP VBW Description Differential Gain Differential Phase Differential Gain Differential Phase 0.1dB Bandwidth Flatness Test Conditions NTSC NTSC 30MHz 30MHz Temp 25C 25C 25C 25C 25C 25 Min Typ 0.01 0.015 0.1 0.1 50 Max 0.05 0.05 Unit %pp pp %pp pp MHz VIDEO PERFORMANCE [3]
1. Large-signal bandwidth calculated using LSBW = Slew Rate / 2 VPEAK. 2. All distortion measurements are made with VOUT = 2VPP, RL = 100 3. Video performance measured at AV = +1 with 2 times normal video level across RL = 100. This corresponds to standard video levels across a backterminated 50 load, i.e., 0-100 IRE, 40IREpp giving a 1VPP video signal across the 50 load. For other values of RL, see curves.
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
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 vs Frequency
2nd and 3rd Harmonic Distortion vs Frequency
2-Tone, 3rd Order Intermodulation Intercept
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
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
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Small Signal Transient Response
Large Signal Transient 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 DC Input Offset at 30MHz
Differential Gain and Phase vs Number of 150 Loads at 3.58MHz
Differential Gain and Phase vs Number of 150 Loads at 4.43MHz
Differential Gain and Phase vs Number of 150 Loads at 30MHz
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Equivalent Circuit
Burn-In Circuit
All Packages Use The Same Schematic
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
Applications Information
Product Description
The EL2073C is a wideband monolithic operational amplifier built on a high-speed complementary bipolar process. The EL2073C 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 EL2073C 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 EL2073C is an excellent choice for applications such as log amplifiers. The EL2073C also has excellent DC specifications: 200V, VOS, 2A IB, 0.1A IOS, and 90dB of CMRR. These specifications allow the EL2073C to be used in DC-sensitive applications such as difference amplifiers. Furthermore, the current noise of the EL2073C is only 3.2 pA/Hz, making it an excellent choice for high-sensitivity transimpedance amplifier configurations. ential 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, 4.43MHz for PAL, or 30MHz for HDTV. 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 EL2073C has been designed to be among the best video amplifiers in the marketplace today. It has been thoroughly characterized for video performance in the topology described above, and the results have been included as minimum 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 EL2073C exhibits dG and dP of only 0.01% and 0.015 at NTSC and PAL. Because dG and dP vary with different DC offsets, the superior video performance of the EL2073C 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 excellent output drive capability of the EL2073C allows it to drive up to 4 back-terminated loads with excellent video performance. With 4 150 loads, dG and dP are only 0.15% and 0.08 at NTSC and PAL. For more information, refer to the curves for Video Performance vs Number of 150 Loads.
Gain-Bandwidth Product
The EL2073C has a gain-bandwidth product of 200MHz. 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 EL2073C has a -3dB bandwidth of 400MHz at a gain of +1, dropping to 200MHz at a gain of +2. It is important to note that the EL2073C 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 EL2073C in a gain of +1 only exhibits 1dB of peaking with a 100 load.
Video Performance
An industry-standard method of measuring the video distortion of a component such as the EL2073C is to measure the amount of differential gain (dG) and differ9
Output Drive Capability
The EL2073C has been optimized to drive 50 and 75 loads. It can easily drive 6VPP into a 50 load. This high output drive capability makes the EL2073C an ideal choice for RF, IF and video applications. Furthermore,
EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
the current drive of the EL2073C remains a minimum of 50mA at low temperatures. The EL2073C is currentlimited 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. surface-mount components (resistors, capacitors, etc.) is also recommended.
Capacitive Loads
Although the EL2073C has been optimized to drive resistive loads as low as 50, 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 Cload has been included for reference. Values of Rs were chosen to maximize resulting bandwidth without 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 1F-10F tantalum capacitor is recommended in parallel with a 0.01F ceramic capacitor. All lead 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 1000 to 2000 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 low-inductance for best performance. If possible, solder the EL2073C 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
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
EL2073C Macromodel
* * Connections: input * | -input * | | +Vsupply * | | | -Vsupply * | | | | output * | | | | | .subckt M2073C 3 2 7 4 6 * *Input Stage * ie 37 4 1mA r6 36 37 125 r7 38 37 125 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 1Meg * * Compensation Section * ga 0 34 33 0 2m rh 34 0 500K ch 34 0 1.2pF rc 34 40 400 cc 40 0 0.3pF * * Poles * ep 41 0 40 0 1 rpa 41 42 75 cpa 42 0 0.5pF rpb 42 43 50 cpb 43 0 0.5pF * * 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
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EL2073C
EL2073C
200MHz Unity-Gain Stable Operational Amplifier
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
September 26, 2001
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
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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.
Printed in U.S.A.
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