apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 features ? low bias current fet input ? protected output stage thermal shutoff ? excellent linearity c lass a/b o utput ? wide supply range 12v to 50v ? high output current 5a p eak applications ? motor, valve and actuator control ? magnetic deflection circuits up to 4a ? power transducers up to 100 k h z ? temperature control up to 180w ? programmable power supplies up to 90v ? audio amplifiers up to 60w rms description the PA07 is a high voltage, high output current operational ampli?er designed to drive resistive, inductive and capacitive loads. for optimum linearity, especially at low levels, the out - put stage is biased for class a/b operation using a thermistor compensated base-emitter voltage multiplier circuit. a thermal shutoff circuit protects against overheating and minimizes heatsink requirements for abnormal operating conditions. the safe operating area (soa) can be observed for all operating conditions by selection of user programmable current limiting resistors. both ampli?ers are internally compensated for all gain settings. for continuous operation under load, a heatsink of proper rating is recommended. this hybrid circuit utilizes thick ?lm (cermet) resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. the 8-pin to-3 package is hermetically sealed and electrically isolated. the use of compressible washers and/or improper mounting torque will void the product warranty. please see general operating considerations. equivalent schematic ??? ???? ??? ??? ???? ??? ??? ??? ? ? ???????? ? ??? ? ??? ? ? ? ? ?????? ? ? ??? ? ? ? ? ?? ? ??? ? ???? ? ? ? ? ? ? ? ? typical application negates optoelectronic instabilities lead network minimizes overshoot sequential position control position is sensed by the differentially connected photo diodes, a method that negates the time and temperature variations of the optical components. off center positions produce an error current which is integrated by the op amp circuit, driving the system back to center position. a momen - tary switch contact forces the system out of lock and then the integrating capacitor holds drive level while both diodes are in a dark state. when the next index point arrives, the lead network of c1 and r1 optimize system response by reducing overshoot. the very low bias current of the PA07 augments performance of the integrator circuit. external connections note: input offset voltage trim optional. r t = 10k max ????? ? ??? ? ??? ? ? ? ? ? ? ? ?? ? ?? ???? ???? ???? ???? ?? ?? ??? ??? ????? ?????? ????????? ?????????? ???? ? ? ? ? ? ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ?? ???? ???? ??? ??? ??? ?? ?? ?? ?? ?? ??? ??? ??? ?? ?? ??? ??? ???? ???? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?????????????????????????????????????? ???????????? 8-pin to-3 package style ce
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 absolute maximum ratings specifications specifications absolute maximum ratings supply voltage, +v s to Cv s 100v output current, within soa 5a power dissipation, internal 1 67w input voltage, differential 50v input voltage, common mode v s temperature, pin solder - 10s 300c temperature, junction 1 200c temperature range, storage C65 to +150c operating temperature range, case C55 to +125c PA07 PA07a parameter test conditions 2 min typ max min typ max units input offset voltage, initial t c = 25c .5 2 .25 .5 mv offset voltage, vs. temperature full temperature range 10 30 5 10 v/c offset voltage, vs. supply t c = 25c 8 * v/v offset voltage, vs. power full temperature range 20 10 v/w bias current, initial 3 t c = 25c 5 50 3 10 pa bias current,vs. supply t c = 25c .01 * pa/v offset current, initial 3 t c = 25c 2.5 50 1.5 10 pa input impedance, dc t c = 25c 10 11 * input capacitance t c = 25c 4 * pf common mode voltage range 4 full temperature range v s C10 * v common mode rejection, dc full temperature range, v cm = 20v 120 * db gain open loop gain at 15hz t c = 25c, r l = 15 89 95 * * db gain bandwidth product @ 1mhz t c = 25c, r l = 15 1.3 * mhz power bandwidth t c = 25c, r l = 15 18 * khz phase margin full temperature range, r l = 15 70 * output voltage swing 4 full temp. range, i o = 5a v s C5 * v voltage swing 4 full temp. range, i o = 2a v s C5 * v voltage swing 4 full temp. range, i o = 90ma v s C5 * v current, peak t c = 25c 5 * a settling time to .1% t c = 25c, 2v step 1.5 * s slew rate t c = 25c 5 * v/s capacitive load, unity gain full temperature range 1 * nf capacitive load, gain>4 full temperature range soa * power supply voltage full temperature range 12 35 50 * * * v current, quiescent t c = 25c 18 30 * * ma thermal resistance, ac, junction to case 5 f>60hz 1.9 2.1 * * c/w resistance, dc, junction to case f<60hz 2.4 2.6 * * c/w resistance, junction to air 30 * c/w temperature range, case meets full range speci?cations C25 25 +85 * * * c notes: * the speci?cation of PA07a is identical to the speci? cation for PA07 in applicable column to the left. 1. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. 2. the power supply voltage for all speci? cations is the typ rating unless otherwise noted as a test condition. 3. doubles for every 10c of temperature increase. 4. +v s and Cv s denote the positive and negative supply rail respectively. total v s is measured from +v s to Cv s . 5. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. PA07 ? PA07a the internal substrate contains beryllia (beo). do not break the seal. if accidentally broken, do not crush, machine, or subject to temperatures in excess of 850c to avoid generating toxic fumes. caution
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 typical performance graphs PA07 ? PA07a ?? ??? ??????????????????????? ? ???? ?? ?? ??? ????????????????? ??????????????????????????????? ? ???? ?? ??? ?? ?? ?? ?? ?? ??? ??? ? ? ??????? ? ? ?????? ? ? ?????? ? ? ??????? ? ? ? ? ????????????????? ? ???? ? ? ? ???????????????????? ??????????????????????????? ??? ???? ? ? ? ? ? ? ? ? ? ??????? ? ? ??????? ? ? ???????? ??? ?? ??? ??? ? ?? ??? ???????????? ? ??? ? ?? ?? ?? ?? ?????????????? ? ????? ?????????????????????????? ? ???? ? ?? ?? ?? ?? ??? ??? ? ?? ?? ?? ?????????????? ????????????????????????????????? ?? ?? ??? ?? ?? ????? ? ????? ? ?????????????? ? ????? ? ??? ??? ????????????????? ??? ? ?? ??? ????????????????????? ????????????????? ?? ????? ?? ?? ?? ??? ?? ?? ??? ??? ?? ? ??? ??? ??? ???? ???? ??? ? ?????????????? ??? ??? ?? ?? ??? ?? ????????????????? ???????????? ???? ???? ??? ??? ?? ??? ??????????????????? ? ????? ? ??? ????????????? ???????????????? ??? ???? ??? ? ?? ?? ??? ??? ?? ??? ? ?? ??????? ? ?? ??????? ? ??? ????????????????? ? ????????????????????? ??????????????????????????????? ?? ?? ??? ??? ?? ??? ?? ?? ?? ?? ??? ? ???????????? ?????????????? ????????????????? ? ??? ??? ? ?? ? ? ? ? ?? ?? ?? ?? ?? ? ? ? ? ? ? ?? ???????? ? ???????? ??? ??? ??? ??? ????????????????? ??? ????????????????? ? ??? ??? ? ?????????????? ??? ??? ??? ?? ?? ?? ?? ?? ?? ??? ??? ? ??????? ? ???????? ??? ? ??????? ? ??????? ?? ??? ??? ??? ????????????????? ?????????????????????? ? ????????? ??????????? ?? ? ?? ?? ? ? ??? ?? ?? ??? ????????????????? ?? ? ??????????????????? ??????????????????? ??? ?? ? ??? ??? ??? ??? ? ? ????????? ? ????????? ? ????? ? ? ?????????? ? ????? ????? ?? ? ? ????????? ? ????????? ? ?????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 operating considerations general please read application note 1 "general operating con - siderations" which covers stability, supplies, heat sinking, mounting, current limit, soa interpretation, and speci?cation interpretation. visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; apexs complete application notes library; technical seminar workbook; and evaluation kits. safe operating area (soa) the output stage of most power ampli?ers has three distinct limitations: 1. the current handling capability of the wire bonds. 2. the second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceed speci?ed limits. 3. the junction temperature of the output transistors. safe operating area curves the soa curves combine the effect of these limits. for a given application, the direction and magnitude of the output current should be calculated or measured and checked against the soa curves. this is simple for resistive loads but more complex for reactive and emf generating loads. however, the following guidelines may save extensive analytical efforts. 1. for dc outputs, especially those resulting from fault condi - tions, check worst case stress levels against the new soa graph. for sine wave outputs, use power design 1 to plot a load line. make sure the load line does not cross the 0.5ms limit and that excursions beyond any other second breakdown line do not exceed the time label, and have a duty cycle of no more than 10%. for other waveform outputs, manual load line plotting is recommended. applications note 22, soa and load lines, will be helpful. a spice type analysis can be very useful in that a hardware setup often calls for instruments or ampli?ers with wide common mode rejection ranges. ?????????? ??????? ????????????????????????????? ??????? ??????? ????????? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??? ????????? ??????????????????????????????????????? ? ???? ? ???? ?????????????????????? ? ??????? ? ???? PA07 ? PA07a 2. the ampli?er can handle any reactive or emf generating load and short circuits to the supply rail or common if the current limits are set as follows at t c = 85c: short to v s short to v s c, l, or emf load common 50v .21a .61a 40v .3a .87a 30v .46a 1.4a 20v .87a 2.5a 15v 1.4a 4.0a these simpli?ed limits may be exceeded with further analysis using the operating conditions for a speci?c application. 3. the output stage is protected against transient ?yback. however, for protection against sustained, high energy ?yback, external fast-recovery diodes should be used. thermal shutdown protection the thermal protection circuit shuts off the ampli?er when the substrate temperature exceeds approximately 150c. this allows heatsink selection to be based on normal operating conditions while protecting the ampli?er against excessive junction temperature during temporary fault conditions. thermal protection is a fairly slow-acting circuit and therefore does not protect the ampli?er against transient soa violations (areas outside of the t c = 25c boundary). it is designed to protect against short-term fault conditions that result in high power dissipation within the ampli?er. if the conditions that cause thermal shutdown are not removed, the ampli?er will oscillate in and out of shutdown. this will result in high peak power stresses, will destroy signal integrity and reduce the reliability of the device. current limit proper operation requires the use of two current limit resis - tors, connected as shown in the external connections diagram. the minimum value for r cl is .12, however, for optimum reliability it should be set as high as possible. refer to the general operating considerations section of the handbook for current limit adjust details. 1 note 1. power design is a self-extracting excel spreadsheet available free from www.apexmicrotech.com this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all speci?cations are subject to change without notice. PA07u rev n june 2003 ? 2003 apex microtechnology corp.
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