apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 features ? power mos technology 2a peak rating ? high gain bandwidth product 150mhz ? very fast slew rate 200v/s ? protected output stage thermal shutoff ? excellent linearity class a/b output ? wide supply range 12v to 40v ? low bias current, low noise fet input applications ? video distribution and and amplification ? high speed deflection circuits ? power transducers to 2mhz ? coaxial line drivers ? power led or laser diode excitation description the pa09 is a high voltage, high output current operational ampli?er optimized to drive a variety of loads from dc through the video frequency range. excellent input accuracy is achieved with a dual monolithic fet input transistor which is cascoded by two high voltage transistors to provide outstanding common mode characteristics. all internal current and voltage levels are referenced to a zener diode biased on by a current source. as a result, the pa09 exhibits superior dc and ac stability over a wide supply and temperature range. high speed and freedom from second breakdown is assured by a complementary power mos output stage. for optimum linearity, especially at low levels, the power mos transistors are biased in the class a/b mode. thermal shutoff provides full protection against overheating and limits the heatsink requirements to dissipate the internal power losses under normal operating conditions. a built-in current limit protects the ampli?er against overloading. transient inductive load kickback protection is provided by two internal clamping diodes. external phase compensation allows the user maximum ?exibility in obtaining the optimum slew rate and gain bandwidth product at all gain settings. for continuous operation under load, a heatsink of proper rating is recommended. this hybrid integrated circuit utilizes thick ?lm (cermet) resis - tors, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top performance. ultrasonically bonded aluminum wires provide reliable intercon - nections at all operating temperatures. the ce, 8-pin to-3 package is hermeti - cally sealed and elec - trically isolated. the use of com-pressible thermal washers and/ or improper mounting torque will void the product warranty. please see general operating consider - ations. ???? ???? ????? ? ? ???? ? ?? ? ??? ? ? ? ? ???? ? ? ???? ? ? ? ? ? ? ? ? ? ?????? ?? ?? ??????? ????? ?? ?? ? ? ? ???? ?? ? ? ??????????????????????????????????????? deflection amplifier (figure 1) the de?ection ampli?er circuit of figure 1 achieves arbi - trary beam positioning for a fast heads-up display. maximum transition times are 4s while delivering 2a pk currents to the 13mh coil. the key to this circuit is the sense resistor (r s ) which converts yoke current to voltage for op amp feedback. this negative feedback forces the coil current to stay exactly proportional to the control voltage. the network consisting of r d , r f and c f serves to shift from a current feedback via r s to a direct voltage feedback at high frequencies. this removes the extra phase shift caused by the inductor thus preventing oscillation. see application note 5 for details of this and other precision magnetic de?ection circuit s. equivalent schematic 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 80v output current, within soa 5a power dissipation , internal 1 78w i nput voltage, differential 40v input voltage, common mode v s temperature, pin solder - 10s 300c temperature , junction 1 150c temperature range, storage C65 to +150c operating temperature range , case C55 to +125c pa09 PA09A parameter test conditions 2 min typ max min typ max units input offset voltage, initial .5 3 .25 .5 mv offset voltage , vs. temperature full temperature range 10 30 5 10 v/c offset voltage , vs. supply 10 * v/v bias current, initial 5 100 3 20 pa bias current, vs. supply .01 * pa/v offset current, initial 2.5 50 1.5 10 pa input impedance , dc 10 11 * i nput capacitance 6 * pf common mode voltage range 3 full temperature range v s C10 v s C8 * * v common mode rejection , dc full temperature range, v cm = 20v 104 * db gain open loop gain at 15hz r l = 1k 80 98 * db gain bandwidth product at 1mhz c c = 5pf 150 * mhz power bandwidth r l = 15, c c = 5pf 750 * khz power bandwidth r l = 15, c c = 100pf 150 * khz output voltage swing 3 full temperature range, i o = 2a v s C8 v s C7 * * v current, peak 4.5 * a settling time to 1% 4v step, c c = 100pf .75 * s settling time to .1% 4v step, c c = 100pf 1.3 * s slew rate c c = 5pf 220 * v/s slew rate c c = 100pf 25 * v/s resistance 7.5 * power supply voltage full temperature range 12 35 40 * * * v current, quiescent 70 85 * * ma thermal resistance , ac junction to case 4 full temperature range, f > 60hz 1.2 1.3 * * c/w resistance , dc junction to case full temperature range, f < 60hz 1.6 1.8 * * c/w resistance, junction to air full temperature range 30 * c/w temperature range , case meets full range speci?cations C25 25 + 85 * * * c pa09 ? PA09A 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 notes: * the speci?cation of PA09A is identical to the speci? cation for pa09 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. unless otherwise noted: t c = 25c, supply voltage = 35v. 3. +v s and -v s denote the positive and negative supply rail respectively. total v s is measured from +v s to Cv s . 4. rating applies if the output current alternates between both output transistors at a rate faster than 60hz.
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 typical performance graphs pa09 ? PA09A ? ?? ?? ?? ??? ??? ??????????????????? ? ????? ?? ?? ?? ?? ?????????????? ????????????????????????????????? ??? ??? ? ? ? ????????????? ? ? ?? ??? ??? ?? ????????????????? ?????????????????????? ? ????????? ? ? ? ? ?? ???????????????????? ? ? ???? ???????????????????? ??????????????????????? ?? ??? ?? ? ?? ??? ????????????????? ????????????????????? ??????????????????????????????? ?? ?? ??? ??? ???? ?? ???????????????? ?????????????????????? ???????????????????????????????? ???????????????? ??? ???? ?? ??????????? ?? ?? ?? ?? ??? ?? ?? ?? ? ?? ??? ?? ????????????????? ? ???? ???????????????????????????? ?? ?? ?? ??? ??? ???? ?? ???? ? ?? ?? ?? ?? ??? ? ??????????????????????? ? ????? ? ? ?? ???? ?? ?? ??? ??? ?? ?? ?? ?? ?? ? ???? ?? ? ? ??? ? ? ? ? ??? ? ? ? ???? ? ?? ?? ? ???? ? ????????? ? ???????? ? ? ??????? ????????????????? ? ???? ???? ???? ??? ??? ?? ?? ? ? ?? ??? ??? ? ? ?? ?? ?????????????????????????? ??????????????????? ???? ????????????????????????? ? ????? ??? ??? ?? ?? ?? ?? ? ??? ???? ??? ?? ???? ??? ?? ??? ?? ??? ???? ????? ???? ????????????????? ?????????????????????? ????????????????????? ? ??? ??? ???? ???? ???? ???? ??? ?? ???? ??? ?? ??? ?? ????????????????? ?????????????????????? ?????????????? ??? ???? ????? ????? ???? ??? ?????? ????? ????? ???? ????? ????? ???? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??? ??? ?????????????????? ????????????????? ? ??? ?? ? ?????????????? ?? ?? ?? ??? ????? ?? ?? ?? ??????????????????????? ? ???? ??? ????????????????? ??? ?? ?? ?? ?? ?? ??????????????????????????????? ? ???? ??? ???
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 operating considerations pa09 ? PA09A 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. supply voltage the speci?ed voltage (v s ) applies for a dual () supply having equal voltages. a nonsymmetrical (ie. +70/C10v) or a single supply (ie. 80v) may be used as long as the total volt - age between the +v s and Cv s rails does not exceed the sum of the voltages of the speci?ed dual supply. safe operating area (soa) the mosfet output stage of this power operational ampli - ?er has two distinct limitations: 1. the current handling capability of the mosfet geometry and the wire bonds. 2. the junction temperature of the output mosfets. safe operating area curves the soa curves combine the effect of these limits and allow for internal thermal delays. for a given application, the direc - tion 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. the following guidelines may save extensive analytical efforts: 1. capacitive and inductive loads up to the following maximums are safe: v s capacitive load inductive load 40v .1f 11mh 30v 500f 24mh 20v 2500f 75mh 15v 100mh 2. short circuits to ground are safe with dual supplies up to 20v. 3. the output stage is protected against transient ?yback. however, for protection against sustained, high energy ?yback, external fast-recovery diodes should be used. bypassing of supplies each supply rail must be bypassed to common with a tantalum capacitor of at least 47f in parallel with a .47f ceramic capacitor directly connected from the power supply pins to the ground plane. output leads keep the output leads as short as possible. in the video frequency range, even a few inches of wire have signi?cant inductance, raising the interconnection impedance and limit - ing the output current slew rate. furthermore, the skin effect increases the resistance of heavy wires at high frequencies. multistrand litz wire is recommended to carry large video currents with low losses. grounding single point grounding of the input resistors and the input signal to a common ground plane will prevent undesired current feedback, which can cause large errors and/or instabilities. "single point" is a key phrase here; a ground plane should be used as shielding rather than a current path. leaving the case of the pa09 ?oating will cause oscillations in some ap - plications. compensation the pa09 is extremely ?exible in terms of choice of com - pensation capacitor for any given gain. the most common ranges are shown in the compensation typical performance graph. swinging closer to the supply rails, heavier loads, faster input signal rise and fall times and higher supply voltages all tend to demand larger values of compensation capacitor. this capacitor must be rated at least as high as the total voltage applied to the ampli?er. in making speci?c value choices, use the square wave stability test presented in application note 19, figures 40 and 41. in addition to small signal testing, if the application includes step functions in the input signal, use this circuit to measure large signal response. by increasing square wave amplitude to the maximum of the application, this test may show signi?cant distortion of the output waveform following the square wave transitions. in this case the faster input stages of the pa09 are out-running the output stage and overload recovery time creates the distortion. this speed relationship is also why slew rate does not increase for compensation values below about 27pf. supply current when swinging large signals, the output stage of the pa09 demands extra supply current. the following graphs illustrate this current for several conditions for both sine and square wave signals. current is exclusive of any load current and will ?? ?? ?? ?? ?? ??? ??? ?? ??? ??? ??? ??? ??? ?? ?? ?? ?? ???????????????????????????????????????? ? ??? ? ???? ?????????????????????? ? ?????? ? ???? ? ? ??????? ????????? ???????????? ????????? ???
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 5 pa09 ? PA09A affect both supply rating and thermal ratings. when calculat - ing internal power dissipation, multiply this current times total supply voltage. note that swinging closer to the supply rail demands more current. output voltage is given as peak. currents are aver - age responding supply readings, but ac monitoring will reveal current pulses corresponding to periods of high slew rate. for example, driving 30v outputs at 500khz on 40v sup - plies produces a .8a pulse during negative slew and a 1.2a pulse during positive slew. if the input signal is over driven by several times the output swing capability, pulses up to 4a may be seen. 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 operating considerations ??? ?? ???? ? ??? ?? ???? ? ??? ?? ???? ? ??? ??? ??? ??? ??? ?? ??? ???? ???????????? ? ????? ?????????????????????????? ?????????????????? ??? ?? ???? ? ??? ?? ???? ? ??? ?? ???? ? ??? ??? ??? ??? ??? ??? ???? ??? ??? ???????????? ? ????? ???????????????????????? ?????????????????? oscillate in and out of shutdown. this will result in high peak power stresses, destroy signal integrity, and reduce the reli - ability of the device. stability due to its large bandwidth the pa09 is more likely to os - cillate than lower bandwidth power operational ampli?ers. to prevent oscillations a reasonable phase margin must be maintained by: 1. pay very careful attention to supply bypassing and circuit grounding. this is very important when step functions are driven and the pa09 shares supplies with more active devices. 2. keeping the external sumpoint stray capacitance to ground at a minimum and the sumpoint load resistance (input and feedback resistors in parallel) below 500. larger sumpoint load resistances can be used with increased phase com - pensation and/or bypassing of the feedback resistor. 3. connect the case to a local ac ground potential. current limit internal current limiting is provided in the pa09. note the current limit curve given under typical performance graphs is based on junction temperature. if the ampli?er is operated at cold junction temperatures, current limit could be as high as 8 amps. this is above the maximum allowed current on the soa curve of 5 amps. systems using this part must be designed to keep the maximum output current to less than 5 amps under all conditions. the internal current limit only provides this protec - tion for junction temperatures of 80c and above. 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. pa09u rev k august 2005 ? 2005 apex microtechnology corp.
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