ELH0101 ELANTEC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 16
Technical content
Features
# 5A peak, 2A continuous output current # 10 V/ ms slew rate # 300 kHz power bandwidth # 850 mW standby power ( g15V 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.
Ordering Information
Part No. Temp. Range Package Outline Ý ELH0101AK/883B b55§Ct o a125§C TO-3 MDP0003 ELH0101K/883B b55§Ct o a125§C TO-3 MDP0003 8508901YX and 8508902YX are the SMD versions of this device. Connection Diagram 0101–1 Top View Note: Electrically connected internally. No connection should be made to pin. General Description The ELH0101 is a wideband power operational amplifier featur- ing 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, deflec- tion yoke drivers, programmable power supplies, and disk head positioner amplifiers. Elantec facilities comply with MIL-I-45208A and other applica- ble 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 proce- dures request brochure QRA-1. Equivalent Schematic 0101–2 TAB WIDE
Power Operational Amplifier Absolute Maximum Ratings VS Supply Voltage ELH0101, ELH0101A g22V PD Power Dissipation at T A e 25§C5 W Derate linearly at 25 §C/W to zero at 150 §C PD Power Dissipation at T C e 25§C 62W Derate linearly at 2 §C/W to zero at 150 §C Differential Input Voltage ELH0101, ELH0101A g40V but k gVS VIN Input Voltage Range ELH0101, ELH0101A g20V but k gVS Peak Output Current (50 ms pulse) 5A Output Short Circuit Duration (within rated power dissipation, R SC e 0.35X,T A e 25§C) Continuous TA Operating Temperature Range: ELH0101, ELH0101A b55§Ct o a125§C TJ Maximum Junction Temperature 150 §C TST Storage Temperature b65§Ct o a150§C Lead Temperature (Soldering, 10 seconds) 300 §C 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 T JeTCeTA. Test Level Test Procedure I 100% production tested and QA sample tested per QA test plan QCX0002. II 100% production tested at T A e 25§C and QA sample tested at T A e 25§C, TMAX and T MIN per QA test plan QCX0002. III QA sample tested per QA test plan QCX0002. IV Parameter is guaranteed (but not tested) by Design and Characterization Data. V Parameter is typical value at T A e 25§C for information purposes only. Parameter Description Test Conditions ELH0101 ELH0101A Level Test Units Min Typ Max Min Typ Max VOS Input Offset 1 10 1 3 I mV Voltage TMIN s TA s TMAX, 15 7 I mVELH0101 DVOS/DPD Change in Input (Note 2) Offset Voltage with 150 150 V mV/W Dissipated Power DVOS/DT Change in Input Offset Voltage with 10 10 V mV/§C Temperature IB Input Bias Current 1,000 300 I pA TA s TMAX, 1,000 300 I nAELH0101 TD is 2.3in
Power Operational Amplifier Parameter Description Test Conditions ELH0101 ELH0101A Level Test Units Min Typ Max Min Typ Max IOS Input Offset 250 75 I pA Current TA s TMAX, 250 75 I nAELH0101, A AVOL Large Signal V O e g10V, R L e 10X 50 200 50 200 I V/mVVoltage Gain VO Output Voltage R SC e 0X,A V e 1, g11.7 g12.5 g11.7 g12.5 I VSwing R L e 100X (Note 3) RSC e 0X,A V e 1, g11 g11.6 g11 g11.6 I VRL e 10X (Note 3) RSC e 0X,A V e 1, g10.5 g11 g10.5 g11 I VRL e 5X (Note 3) CMRR Common-Mode V IN e g10V 85 100 85 100 I dBRejection Ratio PSRR Power Supply g5V s VS s g15V 85 100 85 100 I dB Rejection Ratio a5V s VS(a) s a15V, 80 110 80 110 I dBVS(b) eb 15V b5V t VS(b) t b15V, 80 95 80 95 I dBVS(a) ea 15V IS Supply Current 28 35 28 35 I mA Parameter Description Test Conditions ELH0101 ELH0101A Level Test Units Min Typ Max Min Typ Max en Equivalent Input f e 1 kHz 25 25 V nV/ 0HzNoise Voltage CIN Input Capacitance f e 1 MHz 3 3 V pF PBW Power Bandwidth, R L e 10X,A V e 1 300 300 V kHzb3d B SR Slew Rate R L e 10X,A V e 1 7.5 10 7.5 10 I V msELH0101AK tr,t f Small Signal Rise R L e 10X,A V e 1 200 200 V nsor Fall Time Small Signal R L e 10X,A V e 1 10 10 V %Overshoot TD is 3.5inTD is 2.2in
Power Operational Amplifier Parameter Description Test Conditions ELH0101 ELH0101A Level Test Units Min Typ Max Min Typ Max GBW Gain-Bandwidth R L e %,A V e 1 4 5 4 5 I MHzProduct ELH0101AK tS Large Signal Settling Time R L e %,A V e 12 2 V ms (0.01%) THD Total Harmonic f e 1 kHz, P O e 0.5W, 0.008 0.008 V %Distortion R L e 10X Note 1: Specification is at T A e 25§C. Actual values at operating temperature may differ from the T A e 25§C value. When supply voltages are g15V, quiescent operating junction temperature will rise approximately 20 §C without heatsinking. Accordingly, VOS may change 0.5 mV and I B and I OS will change significantly during warm-ups. Refer to I B 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. R SC is the current sense resistor. TD is 1.5in
Power Operational Amplifier Typical Performance Curves Power Dissipation Safe Operating Area Current Quiescent Power Supply Input Bias Current Warm-up Input Bias Current After Voltage Range Input Common-Mode Frequency Response Open-Loop Small Signal Frequency Output Voltage Swing vs Ratio vs Frequency Common-Mode Rejection 0101–3
Power Operational Amplifier Typical Performance Curves Ð Contd. Ratio vs Frequency Power Supply Rejection Settling Time vs Frequency Total Harmonic Distortion vs Gain Total Harmonic Distortion Voltage Equivalent Input Noise Swing Enhancement Output Voltage Swing with Load Resistance Output Voltage Swing vs Resistance Open-Loop Output Resistance vs Frequency Open-Loop Output 0101–4
Power Operational Amplifier Typical Performance Curves Ð Contd. 0101–5 Typical Applications High Power Voltage Follower 0101–6 High Power Voltage Follower with Swing Enhancement 0101–7 Restricting Outputs to Positive Voltage Only 0101–8 Generating a Split Supply from a Single Voltage Supply 0101–9
Power Operational Amplifier Typical Applications Ð Contd. g5t o g35 Power Source or Sink 0101–10 CRT Deflection Yoke Driver 0101–11 DC Servo Amplifier 0101–12 High Current Source/Sink 0101–13
Power Operational Amplifier 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. 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 nei- ther case does a latch occur since raising the in- put back within the common-mode range again puts the input stage and thus the amplifier in a normal operating mode. Exceeding the positive common-mode limit on a single input will not change the phase of the out- put, however; if both inputs exceed the limit, the output of the amplifier will be forced to a high state. These amplifiers will operate with the common- mode input voltage equal to the positive supply. In fact, the common-mode voltage may exceed the positive supply by approximately 100 mV, in- dependent of supply voltage and over the full op- erating 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. With the ELH0101 there is a temptation to re- move the bias current compensation resistor nor- mally used on the non-inverting input of a sum- ming 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 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. Although difficulties can be largely avoided by installing clamp diodes across the supply lines on every PC board, a conservative design would in- clude 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 precau- tion is by no means limited to the ELH0101. Layout Considerations When working with circuitry capable of resolving picoampere level signals, leakage currents in cir- cuitry external to the op amp can significantly degrade performance. High quality insulation is a must (Kel-F and Teflon rate high). Proper clean- ing 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 envi- ronments or near 0 §C, some form of surface coat- ing may be necessary to provide a moisture barri- er. 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. Electrostatic shielding of high impedance circuit- ry is advisable. Error voltages can also be generated in the exter- nal circuitry. Thermocouples formed between dis- similar metals can cause hundreds of microvolts of error in the presence of temperature gradients. Since the ELH0101 can deliver large output cur- rents, careful attention should be paid to power supply, power supply bypassing and load cur- rents. Incorrect grounding of signal inputs and load can cause significant errors.
Power Operational Amplifier Applications Information Ð Contd. Every attempt should be made to achieve a sin- gle point ground system as shown in the figure below. 0101–14 Bypass capacitor C BX should be used if the lead lengths of bypass capacitors C B are long. If a sin- gle point ground system is not possible, keep sig- nal, 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). 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 nec- essary, 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 cur- rent limit pins. This total resistance includes the desired resistor plus leads, PC Board traces, and solder joints. * Assuming a zero TCR current lim- it resistor, typical temperature coefficient of the short circuit will be approximately 0.3%. Thermal Resistance The thermal resistance between two points of a conductive system is expressed as: i 12 e T1 b T2 PD §C/W (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 ther- mal equilibrium (constant heat flow) and there are, indeed, single specific temperatures, T J,T C, and T S, (no temperature distribution in junction, case, or heatsink). Nevertheless, this is a reason- able approximation of actual performance. 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 ma- terial and size of the package, die size and thick- ness, and quality of the die bond to the case or lead frame. The case-to-heatsink thermal resist- ance, i CS, depends on the mounting of the device to the heatsink and upon the area and quality of the contact surface. Typical i CS for a TO-3 pack- age is 0.5 §C/W to 0.7 §C/W, and 0.3 §C/W to 0.5§C/W using silicone grease. The heatsink to ambient thermal resistance, iSA, depends on the quality of the heatsink and the ambient conditions.
Power Operational Amplifier Application Information Ð Contd. Cooling is normally required to maintain the worst case operating junction temperature, T J,o f the device below the specified maximum value, T J(MAX).T J can be calculated from known oper- ating conditions. Rewriting equation (1), we find: iJA e TJ b TA PD §C/W TJ e TA a PDiJA §C Where: P D e (VS b VOUT)I OUT alVg (Vb)lIQ iJA e iJC a iCS a iSA and VS e Supply Voltage 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 sup- ply 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 frequen- cy of the feedback pole by minimizing the capaci- tance from the input to ground. A feedback pole is created when the feedback around any amplifier is resistive. The parallel re- sistance 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 negli- gible effect on stability margin. However, if the feedback pole is less than approximately six times the expected 3 dB frequency, a lead capaci- tor 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. Some inductive loads may cause output stage os- cillation. A 0.01 mF ceramic capacitor in series with a 10 X resistor from the output to ground will usually remedy this situation. 0101–16 Capacitive loads may be compensated for by tra- ditional techniques. (See ‘‘Operational Amplifi- ers: Theory and Practice’’ by Roberge, published by Wiley.) 0101–17 A similar but alternative technique may be used for the ELH0101. 0101–18
Power Operational Amplifier 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 Enhance- ment. Whenever gain is taken in the output stage, either the output stage, or the entire op amp must be appropriately compensated to ac- count for the additional loop gain. Output Resistance The open-loop output resistance of the ELH0101 is a function of the load current. No-load output resistance is approximately 10 X. This decreases to under an X for load currents exceeding 100 mA. Burn-In Circuit 0101–19
Power Operational Amplifier ELH0101 Macromodel * Connections: ainput * l bInput * ll Va * lll Isca * llll Feedback * lllll Vb * llllll Iscb * llllll l Output * llllll l l * em0101 6 52137 8 4 .subckt buffer 21 2 1 3 7 8 4 * Resistors r 132 71 0 r2 26 3 10 r3 30 7 50 r 422 35 0 r5 29 7 2K r 622 22 K r7 27 28 10 r8 24 26 10 * Transistors q 143 08q n d d1 8 4 dclamp q 242 31q p d d2 4 1 dclamp q 372 12 2q p q4 23 22 24 qn q5 21 21 26 qn q 62 312q p q 722 12 9q n q8 27 27 21 qn q9 30 29 28 qp q 1 03 087q n * Models .model qpd pnp (is e88.013eb12 ikf e5A tf e32nS vaf e50V cje e45pF cjc e60pF axtbe2.1 bf e12000 ne e4 ise e1e b 10) .model qnd npn (is e88.013eb12 ikf e5A tf e32nS vaf e50V cje e45pF cjc e60pF axtbe2.1 bf e12000 ne e4 isc e1e b 10) .model dclamp d (is e10eb28 tt e100nS) TAB WIDE TD is 5.2in
Power Operational Amplifier ELH0101 Macromodel Ð Contd. .model qp pnp (is e10eb15 xti e3e g e1.11V vaf e91V bf e200 ne e2.321 ise e6.2fA avjee0.75V mje e0.3333 tr e29nS tf e0.4nS itf e0.4 vtf e10 xtf e2r b e10) .model qn npn (is e3eb15 xti e3e g e1.11V vaf e151V bf e220 ne e1.541 ise e14fA .ends buffer * lf156 Subcircuit * Connections: aInput * l bInput * ll Va * lll Vb * llll Output * lllll .subckt lf156 6 5272 1 * 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 2.4e * Intermediate Stage gcm 0 88 12 0 9.425e b9 ga 88 0 80 90 9.425e b4 r2 88 0 100K c2 91 88 30pF gb 91 0 88 0 28.6 ro2 91 0 74 TAB WIDE TD is 5.8in
Power Operational Amplifier ELH0101 Macromodel Ð Contd. * Output Stage rso 91 21 1 ecl 18 0 91 21 20.69 g c l08 82 001 rcl 20 0 1K d1 18 20 dm1 d2 20 18 dm1 d3a 131 70 dm3 d3b 13 131 dm3 g p l08 87 021 vc 13 21 3.1552V rpla 2 70 10K rplb 2 131 100K d4a 60 141 dm3 d4b 141 14 dm3 g n l08 86 071 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 e3.15eb11 beta e9.2528eb4 vto eb1.0) .model jm2 pjf (is e2.85eb11 beta e9.2528eb4 vto eb0.999) .model dm1 d (is e1.0eb15) .model dm2 d (is e8.0eb16 bv e52.8) .model dm3 d (is e1.0eb16) .model dm4 d (is e1.0eb9) ends lf156 * lf156 model courtesy of Linear Technology Corp. TD is 3.9in
ELH0101/883/8508901/2YXDecember 1994 Rev H 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. 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 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 in- tended 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 replace- ment of defective components and does not cover injury to per- sons or property or other consequential damages. Printed in U.S.A.16