Power Operational Amplifier Features General Description # 5A peak, 2A continuous output current # 10 V/ms slew rate # 300 kHz power bandwidth # 850 mW standby power ( g 15V supplies) # 300 pA input bias current # Virtually no crossover distortion # 2 ms settling time to 0.01% # 5 MHz gain bandwidth # MIL-STD-883 devices 100% manufactured in U.S.A. The ELH0101 is a wideband power operational amplifier featuring FET inputs, internal compensation, virtually no crossover distortion, and rapid settling time. These features make the ELH0101 an ideal choice for DC or AC servo amplifiers, deflection yoke drivers, programmable power supplies, and disk head positioner amplifiers. Ordering Information Equivalent Schematic Part No. ELH0101/883/8508901/2YX ELH0101/883/8508901/2YX TAB WIDE Elantec facilities comply with MIL-I-45208A and other applicable quality specifications. Elantec’s Military devices are 100% fabricated and assembled in our rigidly controlled, ultra-clean facilities in Milpitas, California. For additional information on Elantec’s Quality and Reliability Assurance policy and procedures request brochure QRA-1. Temp. Range Package OutlineÝ ELH0101AK/883B b 55§ C to a 125§ C TO-3 MDP0003 ELH0101K/883B b 55§ C to a 125§ C TO-3 MDP0003 8508901YX and 8508902YX are the SMD versions of this device. Connection Diagram Note: Electrically connected internally. No connection should be made to pin. 0101 – 2 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. Patent pending. © 1985 Elantec, Inc. December 1994 Rev H 0101 – 1 Top View ELH0101/883/8508901/2YX Power Operational Amplifier Absolute Maximum Ratings VS PD PD Supply Voltage ELH0101, ELH0101A Power Dissipation at TA e 25§ C Derate linearly at 25§ C/W to zero at 150§ C Power Dissipation at TC e 25§ C Derate linearly at 2§ C/W to zero at 150§ C Differential Input Voltage ELH0101, ELH0101A VIN Input Voltage Range g 20V but k g VS ELH0101, ELH0101A Peak Output Current (50 ms pulse) 5A Output Short Circuit Duration (within rated power dissipation, RSC e 0.35X, TA e 25§ C) Continuous Operating Temperature Range: b 55§ C to a 125§ C ELH0101, ELH0101A Maximum Junction Temperature 150§ C b 65§ C to a 150§ C Storage Temperature Lead Temperature (Soldering, 10 seconds) 300§ C g 22V 5W 62W TA TJ TST g 40V but k g VS Important Note: All parameters having Min/Max specifications are guaranteed. The Test Level column indicates the specific device testing actually performed during production and Quality inspection. Elantec performs most electrical tests using modern high-speed automatic test equipment, specifically the LTX77 Series system. Unless otherwise noted, all tests are pulsed tests, therefore TJ e TC e TA. Test Level I II III IV V Test Procedure 100% production tested and QA sample tested per QA test plan QCX0002. 100% production tested at TA e 25§ C and QA sample tested at TA e 25§ C , TMAX and TMIN per QA test plan QCX0002. QA sample tested per QA test plan QCX0002. Parameter is guaranteed (but not tested) by Design and Characterization Data. Parameter is typical value at TA e 25§ C for information purposes only. DC Electrical Characteristics (Note 1) VS e g 15V, TA e 25§ C, VCM e 0V Description ELH0101 Test Conditions Min VOS DVOS/DPD DVOS/DT IB Input Offset Voltage Change in Input Offset Voltage with Dissipated Power ELH0101A Typ Max 1 10 TMIN s TA s TMAX, ELH0101 Min Max Test Level Units Typ 1 3 I mV 7 I mV 15 (Note 2) Change in Input Offset Voltage with Temperature Input Bias Current TA s TMAX, ELH0101 2 150 150 V mV/W 10 10 V mV/§ C 1,000 300 I pA 1,000 300 I nA TD is 2.3in Parameter ELH0101/883/8508901/2YX Power Operational Amplifier Parameter Description ELH0101 Test Conditions Min IOS Input Offset Current Typ TA s TMAX, ELH0101, A AVOL Large Signal Voltage Gain VO e g 10V, RL e 10X VO Output Voltage Swing ELH0101A Test Level Units Max 250 75 I pA 250 75 I nA Max Min Typ 50 200 50 200 I V/mV RSC e 0X, AV e 1, RL e 100X (Note 3) g 11.7 g 12.5 g 11.7 g 12.5 I V RSC e 0X, AV e 1, RL e 10X (Note 3) g 11 g 11.6 g 11 g 11.6 I V RSC e 0X, AV e 1, RL e 5X (Note 3) g 10.5 g 11 g 10.5 g 11 I V 85 100 85 100 I dB CMRR Common-Mode Rejection Ratio VIN e g 10V PSRR Power Supply Rejection Ratio g 5V s VS s g 15V 85 100 85 100 I dB a 5V s VS( a ) s a 15V, VS(b) e b15V 80 110 80 110 I dB b 5V t VS( b ) t b 15V, VS( a ) e a 15V 80 95 80 95 I dB I mA Test Level Units IS Supply Current 28 35 28 35 TD is 3.5in DC Electrical Characteristics (Note 1) VS e g 15V, TA e 25§ C, VCM e 0V Ð Contd. Parameter Description ELH0101 Test Conditions Min en Equivalent Input Noise Voltage f e 1 kHz CIN Input Capacitance f e 1 MHz PBW Power Bandwidth, b 3 dB RL e 10X, AV e 1 SR Slew Rate RL e 10X, AV e 1 ELH0101AK tr, tf Small Signal Rise or Fall Time RL e 10X, AV e 1 Small Signal Overshoot RL e 10X, AV e 1 7.5 3 Typ ELH0101A Max Min Typ Max 25 25 V nV/0Hz 3 3 V pF 300 300 V kHz 10 I Vms 200 200 V ns 10 10 V % 10 7.5 TD is 2.2in AC Electrical Characteristics VS e g 15V, TA e TC e TJ e 25§ C ELH0101/883/8508901/2YX Power Operational Amplifier Parameter Description GBW Gain-Bandwidth Product RL e % , AV e 1 ELH0101AK tS Large Signal Settling Time (0.01%) RL e % , AV e 1 Total Harmonic Distortion f e 1 kHz, PO e 0.5W, RL e 10X THD ELH0101 Test Conditions ELH0101A Test Level Units 5 I MHz 2 2 V ms 0.008 0.008 V % Min Typ 4 5 Max Min Typ 4 Max Note 1: Specification is at TA e 25§ C. Actual values at operating temperature may differ from the TA e 25§ C value. When supply voltages are g 15V, quiescent operating junction temperature will rise approximately 20§ C without heatsinking. Accordingly, VOS may change 0.5 mV and IB and IOS will change significantly during warm-ups. Refer to IB vs. temperature and power dissipation graphs for expected values. Note 2: Change in offset voltage with dissipated power is due entirely to average device temperature rise and not to differential thermal feedback effects. Test is performed without any heatsink. Note 3: At light loads, the output swing may be limited by the second stage rather than the output stage. See the application section under ‘‘Output swing enhancement’’ for hints on how to obtain extended operation. RSC is the current sense resistor. 4 TD is 1.5in AC Electrical Characteristics VS e g 15V, TA e TC e TJ e 25§ C Ð Contd. ELH0101/883/8508901/2YX Power Operational Amplifier Typical Performance Curves Power Dissipation Safe Operating Area Quiescent Power Supply Current Input Bias Current Input Bias Current After Warm-up Input Common-Mode Voltage Range Open-Loop Small Signal Frequency Response Output Voltage Swing vs Frequency Common-Mode Rejection Ratio vs Frequency 0101 – 3 5 ELH0101/883/8508901/2YX Power Operational Amplifier Typical Performance Curves Ð Contd. Power Supply Rejection Ratio vs Frequency Settling Time Total Harmonic Distortion vs Frequency Total Harmonic Distortion vs Gain Equivalent Input Noise Voltage Output Voltage Swing with Swing Enhancement Output Voltage Swing vs Load Resistance Open-Loop Output Resistance Open-Loop Output Resistance vs Frequency 0101 – 4 6 ELH0101/883/8508901/2YX Power Operational Amplifier Typical Performance Curves Ð Contd. 0101 – 5 Typical Applications High Power Voltage Follower High Power Voltage Follower with Swing Enhancement 0101 – 6 0101 – 7 Restricting Outputs to Positive Voltage Only Generating a Split Supply from a Single Voltage Supply 0101 – 8 0101 – 9 7 ELH0101/883/8508901/2YX Power Operational Amplifier Typical Applications Ð Contd. g 5 to g 35 Power Source or Sink CRT Deflection Yoke Driver 0101 – 11 0101 – 10 DC Servo Amplifier High Current Source/Sink 0101 – 12 0101 – 13 8 ELH0101/883/8508901/2YX Power Operational Amplifier one supply which can cause excessive current in the second supply. Destruction of the IC could result if the current to the inputs of the device is not limited to less than 100 mA or if there is much more than 1 mF bypass on the supply bus. Applications Information Input Voltages The ELH0101 operational amplifier contains JFET input devices which exhibit high reverse breakdown voltages from gate to source or drain. This eliminates the need for input clamp diodes, so that high differential input voltages may be applied without a large increase in input current. However, neither input voltage should be allowed to exceed the negative supply as the resultant high current flow may destroy the unit. Although difficulties can be largely avoided by installing clamp diodes across the supply lines on every PC board, a conservative design would include enough resistance in the input lead to limit current to 10 mA if the input lead is pulled to either supply by internal currents. This precaution is by no means limited to the ELH0101. Exceeding the negative common-mode limit on either input will cause a reversal of the phase to the output and force the amplifier output to the corresponding high or low state. Exceeding the negative common-mode limit on both inputs will force the amplifier output to a high state. In neither case does a latch occur since raising the input back within the common-mode range again puts the input stage and thus the amplifier in a normal operating mode. Layout Considerations When working with circuitry capable of resolving picoampere level signals, leakage currents in circuitry external to the op amp can significantly degrade performance. High quality insulation is a must (Kel-F and Teflon rate high). Proper cleaning of all insulating surfaces to remove fluxes and other residues is also required. This includes the IC package as well as sockets and printed circuit boards. When operating in high humidity environments or near 0§ C, some form of surface coating may be necessary to provide a moisture barrier. Exceeding the positive common-mode limit on a single input will not change the phase of the output, however; if both inputs exceed the limit, the output of the amplifier will be forced to a high state. The effects of board leakage can be minimized by encircling the input circuitry with a conductive guard ring operated at a potential close to that of the inputs. These amplifiers will operate with the commonmode input voltage equal to the positive supply. In fact, the common-mode voltage may exceed the positive supply by approximately 100 mV, independent of supply voltage and over the full operating temperature range. The positive supply may therefore be used as a reference on an input as, for example, in a supply current monitor and/ or limiter. Electrostatic shielding of high impedance circuitry is advisable. Error voltages can also be generated in the external circuitry. Thermocouples formed between dissimilar metals can cause hundreds of microvolts of error in the presence of temperature gradients. With the ELH0101 there is a temptation to remove the bias current compensation resistor normally used on the non-inverting input of a summing amplifier. Direct connection of the inputs to ground or a low-impedance voltage source is not recommended with supply voltages greater than 3V. The potential problem involves loss of Since the ELH0101 can deliver large output currents, careful attention should be paid to power supply, power supply bypassing and load currents. Incorrect grounding of signal inputs and load can cause significant errors. 9 ELH0101/883/8508901/2YX Power Operational Amplifier Applications Information Ð Contd. Thermal Resistance Every attempt should be made to achieve a single point ground system as shown in the figure below. The thermal resistance between two points of a conductive system is expressed as: i12 e T 1 b T2 § C/W PD (1) where subscript order indicates the direction of heat flow. A simplified heat transfer circuit for a cased semiconductor and heatsink system is shown in the figure below. The circuit is valid only if the system is in thermal equilibrium (constant heat flow) and there are, indeed, single specific temperatures, TJ, TC, and TS, (no temperature distribution in junction, case, or heatsink). Nevertheless, this is a reasonable approximation of actual performance. 0101 – 14 Bypass capacitor CBX should be used if the lead lengths of bypass capacitors CB are long. If a single point ground system is not possible, keep signal, load, and power supply from intermingling as much as possible. For further information on proper grounding techniques refer to ‘‘Grounding and Shielding Techniques in Instrumentation’’ by Morrison, and ‘‘Noise Reduction Techniques in Electronic Systems’’ by Ott (both published by John Wiley and Sons). 0101 – 15 *Short circuit current will be limited to approximately 0.6 . RSC The junction-to-case thermal resistance, iJC, specified in the data sheet depends upon the material and size of the package, die size and thickness, and quality of the die bond to the case or lead frame. The case-to-heatsink thermal resistance, iCS, depends on the mounting of the device to the heatsink and upon the area and quality of the contact surface. Typical iCS for a TO-3 package is 0.5§ C/W to 0.7§ C/W, and 0.3§ C/W to 0.5§ C/W using silicone grease. Leads or PC board traces to the supply pins, short circuit current limit pins, and the output pin must be substantial enough to handle the high currents that the ELH0101 is capable of producing. Short Circuit Current Limiting Should current limiting of the output not be necessary, SC a should be shorted to V a and SC b should be shorted to V b . Remember that the short circuit current limit is dependent upon the total resistance seen between the supply and current limit pins. This total resistance includes the desired resistor plus leads, PC Board traces, and solder joints.* Assuming a zero TCR current limit resistor, typical temperature coefficient of the short circuit will be approximately 0.3%. The heatsink to ambient thermal resistance, iSA, depends on the quality of the heatsink and the ambient conditions. 10 ELH0101/883/8508901/2YX Power Operational Amplifier Some inductive loads may cause output stage oscillation. A 0.01 mF ceramic capacitor in series with a 10X resistor from the output to ground will usually remedy this situation. Application Information Ð Contd. Cooling is normally required to maintain the worst case operating junction temperature, TJ, of the device below the specified maximum value, TJ(MAX). TJ can be calculated from known operating conditions. Rewriting equation (1), we find: iJA e TJ b TA PD § C/W TJ e TA a PDiJA § C Where: PD e (VS b VOUT) IOUT a l V g (V b ) l IQ iJA e iJC a iCS a iSA and VS e Supply Voltage 0101 – 16 Capacitive loads may be compensated for by traditional techniques. (See ‘‘Operational Amplifiers: Theory and Practice’’ by Roberge, published by Wiley.) iJC for the ELH0101 is typically 2§ C/W. Stability and Compensation As with most amplifiers, care should be taken with lead dress, component placement and supply decoupling in order to ensure stability. For example, resistors from the output to an input should be placed with the body close to the input to minimize ‘‘pickup’’ and maximize the frequency of the feedback pole by minimizing the capacitance from the input to ground. A feedback pole is created when the feedback around any amplifier is resistive. The parallel resistance and capacitance from the input of the device (usually the inverting input) to AC ground set the frequency of the pole. In many instances the frequency of this pole is much greater than the expected 3 dB frequency of the closed loop gain and consequently there is negligible effect on stability margin. However, if the feedback pole is less than approximately six times the expected 3 dB frequency, a lead capacitor should be placed from the output to the input of the op amp. The value of the added capacitor should be such that the RC time constant of this capacitor and the resistance it parallels is greater than or equal to the original feedback pole time constant. 0101 – 17 A similar but alternative technique may be used for the ELH0101. 0101 – 18 11 ELH0101/883/8508901/2YX Power Operational Amplifier amp must be appropriately compensated to account for the additional loop gain. Output Swing Enhancement When the feedback pin is connected directly to the output, the output voltage swing is limited by the driver stage and not by output saturation. Output swing can be increased by taking gain in the output stage as shown below in the High Power Voltage Follower with Swing Enhancement. Whenever gain is taken in the output stage, either the output stage, or the entire op Output Resistance The open-loop output resistance of the ELH0101 is a function of the load current. No-load output resistance is approximately 10X. This decreases to under an X for load currents exceeding 100 mA. Burn-In Circuit 0101 – 19 12 ELH0101/883/8508901/2YX ELH0101 Macromodel * Connections: a input b Input * l * Va l l * Isc a l l l * Feedback l l l l * Vb l l l l l * l l l l l l Iscb * l l l l l l l Output * l l l l l l l l * em0101 6 5 2 1 3 7 8 4 .subckt buffer 21 2 1 3 7 8 4 * Resistors r1 3 27 10 r2 26 3 10 r3 30 7 50 r4 2 23 50 r5 29 7 2K r6 2 22 2K r7 27 28 10 r8 24 26 10 * Transistors q1 4 30 8 qnd d1 8 4 dclamp q2 4 23 1 qpd d2 4 1 dclamp q3 7 21 22 qp q4 23 22 24 qn q5 21 21 26 qn q6 23 1 2 qp q7 2 21 29 qn q8 27 27 21 qn q9 30 29 28 qp q10 30 8 7 qn * Models .model qpd pnp (is e 88.013eb12 ikf e 5A tf e 32nS vaf e 50V cje e 45pF cjc e 60pF a xtb e 2.1 bf e 12000 ne e 4 ise e 1e b 10) .model qnd npn (is e 88.013eb12 ikf e 5A tf e 32nS vaf e 50V cje e 45pF cjc e 60pF a xtb e 2.1 bf e 12000 ne e 4 isc e 1e b 10) .model dclamp d (is e 10eb28 tt e 100nS) 13 TD is 5.2in TAB WIDE Power Operational Amplifier ELH0101/883/8508901/2YX TAB WIDE Power Operational Amplifier ELH0101 Macromodel Ð Contd. .model qp pnp (is e 10eb15 xti e 3 eg e 1.11V vaf e 91V bf e 200 ne e 2.321 ise e 6.2fA a ikf e 500mA xtb e 2.1 br e 3.3 nc e 2 cjc e 14.6pF vjc e 0.75V mjc e 0.3333 fc e 0.5 cje e 20pF a vje e 0.75V mje e 0.3333 tr e 29nS tf e 0.4nS itf e 0.4 vtf e 10 xtf e 2 rb e 10) .model qn npn (is e 3eb15 xti e 3 eg e 1.11V vaf e 151V bf e 220 ne e 1.541 ise e 14fA a ikf e 500mA xtb e 2.1 br e 6 nc e 2 cjc e 14.6pF vjc e 0.75V mjc e 0.3333 fc e 0.5 cje e 26pF a vje e 0.75V mje e 0.3333 tr e 51nS tf e 0.4nS itf e 0.6 vtf e 1.7 xtf e 2 rb e 10) .ends buffer * lf156 Subcircuit a Input * Connections: b Input * l * Va l l l l l l l l Vb l l Output 5 2 7 21 l TD is 5.8in * l * l * l .subckt lf156 6 * Input Stage vcm2 40 7 2 rd1 40 80 1.06K rd2 40 90 1.06K j1 80 102 12 jm1 j2 90 103 12 jm2 cin 5 6 4pF rg1 5 102 2 rg2 6 103 2 * CM Clamp dcm1 107 103 dm4 dcm2 105 107 dm4 vcmc 105 7 4V ecmp 106 7 103 7 1 rcmp 107 106 10K dcm3 109 102 dm4 dcm4 105 109 dm4 ecmn 108 2 102 2 1 rcmn 109 108 10K cl 80 90 15pF iss 2 12 0.48mA gosit 2 12 90 80 2.4eb4 * Intermediate Stage gcm 0 88 12 0 9.425eb9 ga 88 0 80 90 9.425eb4 r2 88 0 100K c2 91 88 30pF gb 91 0 88 0 28.6 ro2 91 0 74 14 ELH0101/883/8508901/2YX Power Operational Amplifier ELH0101 Macromodel Ð Contd. TD is 3.9in * Output Stage rso 91 21 1 ecl 18 0 91 21 20.69 gcl 0 88 20 0 1 rcl 20 0 1K d1 18 20 dm1 d2 20 18 dm1 d3a 131 70 dm3 d3b 13 131 dm3 gpl 0 88 70 2 1 vc 13 21 3.1552V rpla 2 70 10K rplb 2 131 100K d4a 60 141 dm3 d4b 141 14 dm3 gnl 0 88 60 7 1 ve 21 14 3.1552V rnla 60 7 10K rnlb 141 7 100K ip 2 7 4.52mA dsub 7 2 dm2 * Models .model jm1 pjf (is e 3.15eb11 beta e 9.2528eb4 vto eb1.0) .model jm2 pjf (is e 2.85eb11 beta e 9.2528eb4 vto eb0.999) .model dm1 d (is e 1.0eb15) .model dm2 d (is e 8.0eb16 bv e 52.8) .model dm3 d (is e 1.0eb16) .model dm4 d (is e 1.0eb9) ends lf156 * lf156 model courtesy of Linear Technology Corp. 15 ELH0101/883/8508901/2YX ELH0101/883/8508901/2YX Power Operational Amplifier ELH0101 Macromodel Ð Contd. 0101 – 20 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. December 1994 Rev H WARNING Ð 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, Inc. 1996 Tarob Court Milpitas, CA 95035 Telephone: (408) 945-1323 (800) 333-6314 Fax: (408) 945-9305 European Office: 44-71-482-4596 16 Printed in U.S.A.