apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 features ? wide supply range 15v to 150v ? programmable output current limit ? high output current up to 150ma ? low bias current fet i nput applications ? high voltage instrumentation ? electrostatic transducers & deflection ? programmable power supplies up to 290v ? analog simulators description the PA08 is a high voltage operational ampli?er designed for output voltage swings of up to 145v with a dual () sup - ply or 290v with a single supply. high accuracy is achieved with a cascode input circuit con?guration. all internal biasing is referenced to a zener diode fed by a fet constant current source. as a result, the PA08 features an unprecedented sup - ply range and excellent supply rejection. the output stage is biased-on for linear operation. internal phase compensation assures stability at all gain settings. the safe operating area (soa) can be observed with all types of loads by choosing the appropriate current limiting resistors. for operation into inductive loads, two external ?yback pulse protection diodes are recommended. a heatsink may be necessary to maintain the proper case temperature under normal operating condi - tions. this hybrid integrated circuit utilizes beryllia (beo) substrate, thick ?lm resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. ultrasonically bonded aluminum wires provide reliable inter - connections at all operating temperatures. the 8-pin to-3 package is hermetically sealed and electrically isolated. the use of compressible thermal isolation washers and/or improper mounting torque will void the product warranty. please see general operating considerations. equivalent schematic typical application ate pin driver the PA08 as a pin driver is capable of supplying high test voltages to a device under test (dut). due to the possibility of short circuits to any terminal of the dut, current limit must be set to be safe when limiting with a supply to output volt - age differential equal to the ampli?er supply plus the largest magnitude voltage applied to any other pin of the dut. in addition, ?yback diodes are recommended when the output of the ampli?er exits any equipment enclosure to prevent damage due to electrostatic discharges. refer to application note 7 for details on accuracy considerations of this circuit. external connections ??? ???? ??? ??? ???? ??? ??? ??? ? ? ???????? ? ??? ? ??? ?????? ? ? ? ? ? ? ? ? ? ? ? ? ??????????????????????????????????????????? ? ??????????? ? ? ??? ? ??? ? ????? ? ? ? ?? ?? ???? ???? ????? ????? ????? ?? ? ?? ? ????? ????? ???? ???? ???? ?????? ??? ? ? ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ???? ???? ? ??? ?? ?? ??? ??? ?? ?? ?? ??? ??? ? ??? ?? ?? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ???????????????????????????? ???????????? 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 300v output current, within soa 200ma power dissipation, internal at t c = 25c 17.5w input voltage, differential 50v input voltage, common mode v s temperature, pin solder - 10s max 300c temperature, junction 1 175c temperature range, storage C65 to +150c operating temperature range, case C55 to +125c PA08 PA08a 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 t c = C25c to +85c 15 30 5 10 v/c offset voltage, vs. supply t c = 25c .5 * 2 v/v offset voltage, vs. time t c = 25c 75 * v/kh 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 5 * m input capacitance t c = 25c 4 * pf common mode voltage range 4 t c = C25c to +85c v s C10 * v common mode rejection, dc t c = C25c to +85c, v cm = 90v 130 * db gain open loop gain at 10hz t c = 25c, r l = 118 * db open loop gain at 10hz t c = 25c, r l = 1.2k 96 111 * * db gain bandwidth product at 1mhz t c = 25c, r l = 1.2k 5 * mhz power bandwidth t c = 25c, r l = 1.2k 90 * khz phase margin t c = C25 to +85c 60 * output voltage swing 4 t c = 25c, i o = 150ma v s C15 v s C8 * * v voltage swing 4 t c = C25 o c to +85 o c, i o = 75ma v s C10 v s C5 * * v voltage swing 4 t c = C25 o c to +85 o c, i o = 20ma v s C5 v s C3 * * v current, peak t c = 85c 150 * ma slew rate t c = 25c 30 20 * v/s capacitive load, a v = 1 t c = C25 to +85c 10 * nf capacitive load, a v > 4 t c = C25 to +85c soa * settling time to .1% t c = 25c, r l = 1.2k, 2v step 1 * s power supply voltage t c = C55 to +125c 15 100 150 * * * v current, quiescent t c = 25c 6 8.5 * * ma thermal resistance, ac junction to case 5 t c = C55 to +125c, f > 60hz 4.26 * c/w resistance, dc junction to case t c = C55 to +125c, f < 60hz 6.22 8.57 * * c/w resistance, junction to air t c = C55 to +125c 30 * c/w temperature range, case meets full range speci?cation C25 85 * * c PA08 ? PA08a notes: * the speci?cation of PA08a is identical to the speci? cation for PA08 in applicable column to the left. 1. long term operation at the maximum junction temperature will result in reduced product life. derate power dissipation to achieve high mttf. 2. the power supply voltage speci? ed under typical (typ) applies unless otherwise noted. 3. doubles for every 10 o c of temperature increase. 4. +v s and Cv s denote the positive and negative supply rail respectively. 5. rating applies only if output current alternates between both output transistors at a rate faster than 60hz. 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 PA08 ? PA08a ? ?? ?? ?? ??? ??? ??????????????????? ? ? ?? ?????????????? ????????????????????????????? ? ???? ??? ? ??? ? ??? ??? ??? ?? ??? ??? ??? ????????????????? ?????????????????????? ? ????????? ? ??? ??? ????????????????? ??? ? ?? ??? ????????????????????? ????????????????? ?? ????? ?? ?? ?? ??? ? ??? ??? ??? ???? ???? ??? ? ?????????????? ??? ??? ??? ??? ??? ??? ????????????????? ?? ????????????????? ? ??? ??? ? ? ??? ?? ?? ????????????????? ? ??? ??? ????????????????????? ?????????????????????????????? ?? ?? ??? ? ?? ????????????????? ? ?? ??? ?????????????????????? ???????????????????????????????? ?? ??? ??? ??? ??? ????????????????? ?? ??? ??????????????????? ?????????????????????? ?? ??? ??? ? ?? ??? ??? ?? ?? ? ? ??? ? ?? ?? ?????????????? ???????????????????????? ?? ??? ??????????????????????? ? ???? ? ????????????? ???????????????? ??? ????? ? ?? ??? ??? ??? ?? ?? ??????????? ?? ? ? ?? ??? ?? ?? ?? ??? ??? ?? ?????????????? ??? ?? ??? ?? ??? ??? ?? ?? ?? ?? ?? ??? ??? ?? ??? ??? ???? ?? ??? ?? ????????????????? ???????????? ??????????????????????????????? ? ? ??? ?? ? ? ?? ??? ??? ??? ??? ??? ?? ?? ??? ??? ??? ??? ??? ?? ?? ??? ??? ??? ?? ??? ??? ??? ?? ??? ? ??????????????????? ? ????? ???? ???? ? ?? ?? ?? ??? ?????????????? ????????? ?? ?? ?? ??? ??? ??? ? ? ???????? ? ? ??????? ? ? ???????? ? ?? ??????? ? ?? ?????? ? ? ??????? ? ? ??????? ? ? ??????? ?? ????????????????? ? ???? ? ?? ????????? ? ???????? ???????????? ? ? ??????? ??????????????????????? ? ???? ?? ?? ??? ??? ? ??????? ? ???????? ??? ? ??????? ? ???????? ??? ? ??????? ? ???????? ??? ? ??????? ? ???????? ?? ? ?? ? ?? ????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 operating considerations PA08 ? PA08a 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, in - ternal power dissipation, current limit and heat sink selection. the "application notes" and "technical seminar" sections contain a wealth of information on speci?c types of applications. package outlines, heat sinks, mounting hardware and other accessories are located in the "packages and accessories" section. evaluation kits are available for most apex product models, consult the "evaluation kit" section for details. for the most current version of all apex product data sheets, visit www.apexmicrotech.com. safe operating area (soa) the output stage of most power ampli?ers has two distinct limitations: 1. the current handling capability of the transistor geometry and the wire bonds. 2. the second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceeds speci?ed limits. 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. under transient conditions, the following capacitive and inductive loads are safe with the current limits set to the maximum: v s c(max) l(max) 150v .4f 280mh 125v .9f 380mh 100v 2f 500mh 75v 10f 1200mh 50v 100f 13h 2. the ampli?er can handle any emf generating or reactive load and short circuits to the supply rails or simple shorts to common if the current limits are set as follows: ??? ??? ??? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ??? ?????????????????????????????????????????? ???????????????????? ?? ? ?????? ? ????? ???????????? ??????? ??????? ????????? ???????? short to v sc, short to v s c, l, or emf load common 150v 20ma 67ma 125v 27ma 90ma 100v 42ma 130ma 75v 67ma 200ma 50v 130ma 200ma 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. inductive loads two external diodes as shown in figure 1, are required to protect these ampli?ers from ?yback (kickback) pulses exceeding the supply voltages of the ampli?er when driving inductive loads. for component selection, these external diodes must be very quick, such as ultra fast recovery diodes with no more than 200 nanoseconds of reverse recovery time. the diode will turn on to divert the ?yback energy into the supply rails thus protecting the output transistors from destruction due to reverse bias. a note of caution about the supply. the energy of the ?yback pulse must be absorbed by the power supply. as a result, a tran - sient will be superimposed on the supply voltage, the magnitude of the transient being a function of its transient impedance and current sinking capability. if the supply voltage plus transient exceeds the maximum supply rating or if the ac impedance of the supply is unknown, it is best to clamp the output and the supply with a zener diode to absorb the transient. input protection the input is protected against common mode voltages up to the supply rails and differential voltages up to 50v. increased protection against differential input voltages can be obtained by adding 2 resistors, 2 capacitors and 4 diode connected fets as shown in figure 2. current limiting proper operation requires the use of two current limit resis - tors, connected as shown in the external connection diagram. the minimum value for r cl is 3.24. 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. protection, inductive load protection, overvoltage ????????? ??????? ?? ? ?? ? ?????????? ?????????? ????? ????? ??? ??? ?????? ?????? ? ? ?? ?? ?? ?? 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. PA08u rev k november 2004 ? 2004 apex microtechnology corp.
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