ELH883B

ELH0101 883 8508901 2YX ELH0101 883 8508901 2YX Power Operational Amplifier Features  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 General Description 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 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 Ordering Information Part No Temp Range Package Outline TO-3 TO-3 MDP0003 MDP0003 ELH0101AK 883B b 55 C to a 125 C ELH0101K 883B b 55 C to a 125 C Equivalent Schematic 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 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 TAB WIDE December 1994 Rev H ELH0101 883 8508901 2YX Power Operational Amplifier Absolute Maximum Ratings VS 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 g 22V 5W PD 62W TA TJ TST g 40V but k g VS 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 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 Parameter VOS Description Input Offset Voltage Test Conditions Min TA e 25 C VCM e 0V ELH0101A Max 10 15 Min Typ 1 Max 3 7 Test Level I I Units mV mV ELH0101 Typ 1 TMIN s TA s TMAX ELH0101 (Note 2) 150 DVOS DPD Change in Input Offset Voltage with Dissipated Power Change in Input Offset Voltage with Temperature Input Bias Current 150 V mV W DVOS DT 10 1 000 TA s TMAX ELH0101 1 000 10 300 300 V I I mV C pA nA TD is 2 3in IB 2 ELH0101 883 8508901 2YX Power Operational Amplifier DC Electrical Characteristics (Note 1) VS e g 15V Parameter IOS Description Input Offset Current Test Conditions Min TA e 25 C VCM e 0V Contd Max 75 75 Test Level I I I I I I I I I I 35 I Units pA nA V mV V V V dB dB dB dB mA TD is 3 5in TD is 2 2in ELH0101 Typ Max 250 Min ELH0101A Typ TA s TMAX ELH0101 A VO e g 10V RL e 10X RSC e 0X AV e 1 RL e 100X (Note 3) RSC e 0X AV e 1 RL e 10X (Note 3) RSC e 0X AV e 1 RL e 5X (Note 3) 50 g 11 7 250 200 g 12 5 AVOL VO Large Signal Voltage Gain Output Voltage Swing 50 g 11 7 200 g 12 5 g 11 g 11 6 g 11 g 11 6 g 10 5 g 11 g 10 5 g 11 CMRR PSRR Common-Mode Rejection Ratio Power Supply Rejection Ratio VIN e g 10V g 5V s VS s g 15V 85 85 80 80 100 100 110 95 28 35 85 85 80 80 100 100 110 95 28 a 5V s VS( a ) s a 15V VS(b) e b15V b 5V t VS( b ) t b 15V VS( a ) e a 15V IS Supply Current AC Electrical Characteristics VS e g 15V Parameter en CIN PBW SR tr tf Description Equivalent Input Noise Voltage Input Capacitance Power Bandwidth b 3 dB Slew Rate Small Signal Rise or Fall Time Small Signal Overshoot Test Conditions Min f e 1 kHz f e 1 MHz RL e 10X AV e 1 RL e 10X AV e 1 ELH0101AK RL e 10X AV e 1 RL e 10X AV e 1 TA e TC e TJ e 25 C ELH0101 Typ 25 3 300 Max Min ELH0101A Typ 25 3 300 75 10 200 10 Max Test Level V V V I V V Units nV 0Hz pF kHz Vms ns % 75 10 200 10 3 ELH0101 883 8508901 2YX Power Operational Amplifier AC Electrical Characteristics VS e g 15V Parameter GBW tS Description Gain-Bandwidth Product Large Signal Settling Time (0 01%) Total Harmonic Distortion Test Conditions Min RL e % AV e 1 ELH0101AK RL e % AV e 1 f e 1 kHz PO e 0 5W RL e 10X 4 TA e TC e TJ e 25 C ELH0101 Typ 5 Max Min 4 Contd ELH0101A Typ 5 Max Test Level I Units MHz 2 2 V ms TD is 1 5in THD 0 008 0 008 V % 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 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 Power Supply Rejection Ratio vs Frequency Contd Total Harmonic Distortion vs Frequency Settling Time 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 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 Contd CRT Deflection Yoke Driver g 5 to g 35 Power Source or Sink 0101 – 11 0101 – 10 DC Servo Amplifier High Current Source Sink 0101 – 12 0101 – 13 8 ELH0101 883 8508901 2YX 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 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 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 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 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 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 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 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 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 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 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 Contd Every attempt should be made to achieve a single point ground system as shown in the figure below Thermal Resistance The thermal resistance between two points of a conductive system is expressed as i12 e T 1 b T2 CW 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) 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 0101 – 15 Short circuit current will be limited to approximately 06 RSC 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 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 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 Application Information 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 CW 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 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 iJC for the ELH0101 is typically 2 C W 0101 – 16 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 Capacitive loads may be compensated for by traditional techniques (See ‘‘Operational Amplifiers Theory and Practice’’ by Roberge published by Wiley ) 0101 – 17 A similar but alternative technique may be used for the ELH0101 0101 – 18 11 ELH0101 883 8508901 2YX 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 Enhancement Whenever gain is taken in the output stage either the output stage or the entire op amp must be appropriately compensated to account 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 10X This decreases to under an X for load currents exceeding 100 mA Burn-In Circuit 0101 – 19 12 ELH0101 883 8508901 2YX Power Operational Amplifier ELH0101 Macromodel Connections a input TAB WIDE l l l l l l l l b Input l l l l l l l Va l l l l l l Isc a l l l l l Feedback l l l l Vb l l l Iscb l l Output 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 ELH0101 883 8508901 2YX Power Operational Amplifier ELH0101 Macromodel Contd TAB WIDE 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 l l 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 b Input l l l l 5 Va l l l 2 Vb l l 7 Output l 21 14 TD is 5 8in ELH0101 883 8508901 2YX Power Operational Amplifier ELH0101 Macromodel Contd 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 TD is 3 9in ELH0101 883 8508901 2YX ELH0101 883 8508901 2YX Power Operational Amplifier ELH0101 Macromodel 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 WARNING Life Support Policy December 1994 Rev H 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 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