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EL2045
Data Sheet February 21, 2002 FN7030
Low-Power 100MHz Gain-of-2 Stable Operational Amplifier
The EL2045 is a high speed, low power, low cost monolithic operational amplifier built on Elantec's proprietary complementary bipolar process. The EL2045 is gain-of-2 stable and features a 275V/s slew rate and 100MHz gainbandwidth at gain-of-2 while requiring only 5.2mA of supply current. The power supply operating range of the EL2045 is from 18V down to as little as 2V. For single-supply operation, the EL2045 operates from 36V down to as little as 2.5V. The excellent power supply operating range of the EL2045 makes it an obvious choice for applications on a single +5V or +3V supply. The EL2045 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 +2, the EL2045 has a -3dB bandwidth of 100MHz with a phase margin of 50. Because of its conventional voltage-feedback topology, the EL2045 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 EL2045 an ideal choice for price-sensitive applications requiring low power and high speed.
Features
* 100MHz gain-bandwidth at gain-of-2 * Gain-of-2 stable * Low supply current - 5.2mA at VS = 15V * Wide supply range - 2V to 18V dual-supply and 2.5V to 36V single-supply * High slew rate - 275V/s * Fast-settling - 80ns to 0.1% for a 10V step * Low differential gain - 0.02% at AV = +2, RL = 150 * Low differential phase - 0.07 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
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
Pinout
EL2045 (8-PIN SO & 8-PIN PDIP) TOP VIEW
NC 1 8 NC
* Difference amplifiers
Ordering Information
PART NUMBER EL2045CS EL2045CS-T7 EL2045CS-T13
IN- 2 + 7 V+
PACKAGE 8-Pin SO 8-Pin SO 8-Pin SO 8-Pin PDIP
TAPE & REEL 7" 13" -
PKG. NO. MDP0027 MDP0027 MDP0027 MDP0031
EL2045CN
IN+ 3
6 OUT
V- 4
5 NC
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.
EL2045
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
VS = 15V, RL = 1k, unless otherwise specified. CONDITION VS = 15V TEMP 25C TMIN, TMAX MIN TYP 0.5 MAX 7.0 9.0 10.0 2.8 8.2 9.2 2.8 50 300 400 50 0.3 1500 1500 2500 1750 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 95 85 3000 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 Input Offset Voltage
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
2
EL2045
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 Power-Supply Operating Range AV = +2 @10MHz AV = +2 Dual-supply Single-supply
NOTE: 1. Measured from TMIN To TMAX.
DESCRIPTION
MIN
TYP 5.2
MAX 7 7.6
UNIT mA mA mA k M pF m
25C 25C 25C 25C 25C 25C 25C 2.0 2.5
5.0 150 15 1.0 50 18.0 36.0
V V
Closed-Loop AC Electrical Specifications
PARAMETER BW DESCRIPTION -3dB Bandwidth (VOUT = 0.4VPP)
VS = 15V, AV = +2, RF = RG = 1k, CF = 3pF, RL = 1k unless otherwise specified. CONDITION VS = 15V, AV = +2 VS = 15V, AV = -1 VS = 15V, AV = +5 VS = 15V, AV = +10 VS = 15V, AV = +20 VS = 5V, AV = +2 TEMP 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C 25C VS = 15V, 10V step VS = 5V, 5V step 25C 25C 25C 25C 25C 25C 25C 3.2 200 MIN TYP 100 75 20 10 5 75 200 150 50 275 200 4.4 12.7 3.0 20 2.5 80 60 0.02 0.07 15.0 1.50 Infinite MAX UNIT MHz MHz MHz MHz MHz MHz MHz MHz V/s V/s MHz MHz ns % ns ns ns % nV/Hz pA/Hz pF
GBWP
Gain-bandwidth Product
VS = 15V VS = 5V
PM SR
Phase Margin Slew Rate (Note 1)
RL = 1k, CL = 10pF 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 = +2)
0.1V output step 0.1V output step
dG dP eN iN CI STAB
NOTES:
Differential Gain (Note 3) Differential Phase (Note 3) Input Noise Voltage Input Noise Current Load Capacitance Stability
NTSC/PAL NTSC/PAL 10kHz 10kHz AV = +2
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 backterminated 75 load. For other values of RL, see curves.
3
EL2045 EL2045 Test Circuit
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 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
4
EL2045 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
5
EL2045 Typical Performance Curves (Continued)
Short-Circuit Current vs Temperature 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
Package Power Dissipation vs Ambient Temperature JEDEC JESD51-3 Low Effective Thermal Conductivity Test SO 8-Pin PDIP 8-Lead Board Maximum Power Maximum Power 1.4 Dissipation Dissipation 1.2 1.25W Power Dissipation (W) 1 0.8 781mW 0.6 0.4 0.2 0 0 25 50 75 85 100 125 150 Ambient Temperature (C)
J
A =1
JA =
PD IP 8
10 0 C/ W
SO 8 60 C /W
6
EL2045 Simplified Schematic
Burn-In Circuit
ability to use diodes in the feedback network, the EL2045 is an excellent choice for applications such as fast log amplifiers.
Single-Supply Operation
The EL2045 has been designed to have a wide input and output voltage range. This design also makes the EL2045 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 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 EL2045 still has 1V of output swing.
ALL PACKAGES USE THE SAME SCHEMATIC
Applications Information
Product Description
The EL2045 is a low-power wideband, gain-of-2 stable monolithic operational amplifier built on Elantec's proprietary high-speed complementary bipolar process. The EL2045 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 EL2045 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
Gain-Bandwidth Product and the -3dB Bandwidth
The EL2045 has a gain-bandwidth product of 100MHz 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 EL2045 has 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 EL2045 has been
7
EL2045
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 EL2045 in a gain of +2 only exhibits 1.0dB of peaking with a 1k load.
Printed-Circuit Layout
The EL2045 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.
Video Performance
An industry-standard method of measuring the video distortion of a component such as the EL2045 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 EL2045 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 EL2045 exhibits 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 EL2045 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 EL2045 allows it to drive up to 2 back-terminated loads with good video performance. For more demanding applications such as greater output drive or better video distortion, a number of alternatives such as the EL2120, EL400, or EL2074 should be considered.
The EL2045 Macromodel
This macromodel has been developed to assist the user in simulating the EL2045 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
Output Drive Capability
The EL2045 has been designed to drive low impedance loads. It can easily drive 6VPP into a 150 load. This high output drive capability makes the EL2045 an ideal choice for RF, IF and video applications. Furthermore, the current drive of the EL2045 remains a minimum of 35mA at low temperatures.
8
EL2045 EL2045 Macromodel
* Connections: +input * | | -input * | | +Vsupply * ||| -Vsupply * ||| | output * ||| || .subckt M2045 3 2 7 4 6 * * Input stage * ie 7 37 0.9mA 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 1.5pF rc 34 40 1K cc 40 0 1pF * * Poles * ep 41 0 40 0 1 rpa 41 42 200 cpa 42 0 2pF rpb 42 43 200 cpb 43 0 2pF * * 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
9
EL2045 EL2045 Macromodel (Continued)
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