apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 31 7 external connection fe a tures ? high slew rate 200v/ m s ? fast settling time .1% in 1 m s (pa84s) ? fully protected input up to 150v ? low bias current, low noise fet input ? wide supply range 15v to 150v applic a tions ? high voltage instrumentation ? electrostatic transducers & deflection ? programmable power supplies up to 290v ? analog simulators description the pa84 is a high voltage operational amplifier designed for output voltage swings up to 145v with a dual supply or 290v with a single supply. two versions are available. the new pa84s, fast settling amplifier can absorb differential input over- voltages up to 50v while the established pa84 and pa84a can handle differential input overvoltages of up to 300v. both versions are protected against common mode transients and overvoltages up to the supply rails. high accuracy is achieved with a cascode input circuit configuration. all internal biasing is referenced to a zener diode fed by a fet constant current source. as a result, the pa84 features an unprecedented supply range and excellent supply rejection. the output stage is biased- on for linear operation. external phase compensation allows for user flexibility in obtaining the maximum slew rate. fixed current limits protect these amplifiers against shorts to common at supply voltages up to 150v. for operation into inductive loads, two external flyback pulse protection diodes are recommended. with the exception of pa84s, a built-in thermal shutoff circuit prevents destructive overheating. however, a heatsink may be necessary to maintain the proper case temperature under normal operating conditions. this hybrid integrated circuit utilizes a beryllia (beo) sub- strate, thick film resistors, ceramic capacitors and semicon- ductor 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 thermal isolation washers and/or improper mounting torque will void the product war- ranty. please see general operating considerations. top view 1 2 3 4 5 6 7 8 ? s +in ?n bal comp out bal +v s notes: 1. phase compensation required for safe operation. 2 . input offset trimpot optional. recommended value 100k . w r c c c phase compensation gain 1 10 100 1000 c c 10nf 500pf 50pf none r c 200 2k 20k none w w w typical application the pa84 is ideally suited to driving ink jet control units (often a piezo electric device) which require precise pulse shape control to deposit crisp clear date or lot code information on product containers. the external compensation network has been optimized to match the gain setting of the circuit and the complex impedance of the ink jet control unit. the combi- nation of speed and high voltage capabilities of the pa84 form ink droplets of uniform volume at high production rates to enhance the value of the printer. equivalent schematic +150v ?50v 100k pa84 10v 50k ink jet control 10k dac ...... ...... ...... 4.7k 390pf 2 7 4 3 5 6 1 q1 q2 d1 d2 q18 q15 q12b q9 c4 q8 q13 q4 q3 c1 q16 q17 q5 c5 q12a q14 c6 q10 q6 q7 q11 8 * * * * * * * note: not used for pa84s * http://www.apexmicrotech.com (800) 546-apex (800) 546-2739 microtechnology power operational amplifiers pa84 ?pa84a ?pa84s
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 31 8 notes: * the specification of pa84a is identical to the specification for pa84/pa84s in applicable column to the left. 1. signal slew rates at pins 5 and 6 must be limited to less than 1v/ns to avoid damage. when faster waveforms are unavoidable, resistors in series with those pins, limiting current to 150ma will protect the amplifier from damage. 2. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. 3. the power supply voltage for all tests i s 150v, unless otherwise noted as a test condition. 4. doubles for every 10 c of temperature increase. 5. +v s and Cv s denote the positive and negative power supply rail respectively. 6. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. absolute maximum ratings specifications absolute maximum ratings supply voltage, +v s to Cv s 300v output current, within soa internally limited power dissipation, internal at t c = 25 c 2 17.5w input voltage, differential pa84/pa84a 1 300v input voltage, differential pa84s 50v input voltage, common mode 1 v s temperature, pins for 10s max (solder) 300 c temperature, junction 2 200 c temperature range, storage C65 to +150 c operating temperature range, case C55 to +125 c p a 84 ? p a 84a ? p a84s 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 850 c to avoid generating toxic fumes. caution parameter test conditions 3 min typ max min typ max units input offset voltage, initial t c = 25 c 1.5 3 .5 1 m v offset voltage, vs. temperature t c = C25 to +85 c 10 25 5 10 m v/ c offset voltage, vs. supply t c = 25 c .5 .2 m v/v offset voltage, vs. time t c = 25 c 75 * m v/ ? kh bias current, initial 4 t c = 25 c 5 5 0 3 1 0 p a bias current, vs. supply t c = 25 c .01 * pa/v offset current, initial 4 t c = 25 c 2.5 50 1.5 10 pa offset current, vs. supply t c = 25 c .01 * pa/v input impedance, dc t c = 25 c 1 0 11 * w input capacitance t c = C25 to +85 c 6 * p f common mode voltage range 5 t c = C25 to +85 c v s C1 0 v s C8.5 * * v common mode rejection, dc t c = C25 to +85 c 130 * db gain open loop gain at 10hz t c = 25 c, r l = 120 * db open loop gain at 10hz. t c = 25 c, r l = 3.5k w 100 1 18 * * db gain bandwidth product@ 1mh z t c = 25 c, r l = 3.5k w, r c = 20k w 75 * mhz power bandwidth, high gain t c = 25 c, r l = 3.5k w, r c = 20k w 250 180 * khz power bandwidth, low gain t c = 25 c, r l = 3.5k w, r c = 20k w 120 * khz output voltage swing 5 t c = 25 c, i o = 40ma v s C7 v s C3 * * v voltage swing 5 t c = C25 to +85 c, i o = 15ma v s C5 v s C2 * * v current, peak t c = 25 c 4 0 * m a current, short circuit t c = 25 c 5 0 * m a slew rate, high gain t c = 25 c, r l = 3.5k w , r c = 20k w 200 150 * v/ m s slew rate, low gain t c = 25 c, r l = 3.5k w , r c = 2k w 125 * v/ m s settling time .01% at gain = 100 t c = 25 c, r l = 3.5k w pa84s 2 m s settling time .1% at gain = 100 r c = 20k w , v in = 2v step only 1 m s settling time .01% at gain = 100 t c = 25 c, r l = 3.5k w pa84/84a 20 20 m s settling time .1% at gain = 100 r c = 20k w , v in = 2v step 12 12 m s power supply voltage t c = C55 c to +125 c 15 150 * * v current, quiescent t c = 25 c 5.5 7.5 * * ma thermal resistance, ac, junction to case 6 t c = C55 c to +125 c, f > 60hz 3.8 * c/w resistance, dc, junction to case t c = C55 c to +125 c, f < 60hz 6 6.5 * * c/w resistance, case to air t c = C55 c to +125 c 3 0 * c/w temperature range, case meets full range specifications C25 +85 * * c specifications pa84 a pa84/pa84s
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 31 9 typical performance graphs p a84 ? p a84a ? p a84s 0 2 5 5 0 7 5 100 125 temperature, t c (?) 5 20 30 power derating internal power dissipation, p(w) ?5 100 30 70 80 current limit 50 frequency, f (hz) input noise voltage, v n (nv/ hz) 1 frequency, f (hz) ?0 0 60 small signal response open loop gain, a ol (db) 20 40 80 100 10 1.5 2.5 4.0 5.0 output voltage swing 3.5 4.5 frequency, f (hz) output voltage, v (v ) o slew rate vs. comp slew rate (v/?) 200 total supply voltage, v s (v) .4 .6 1.6 slew rate vs. supply normalized slew rate (x) .8 1.4 common mode voltage common mode voltage, v cm (v pp ) 1 frequency, f (hz) common mode rejection common mode rejection, cmr (db) 40 80 120 10 100 1 frequency, f (hz) power supply rejection power supply rejection, psr (db) 0 150 250 2 open loop gain current limit, i lim (ma) 0 input noise ? ?5 25 50 75 60 25 power response pp 3 0 50 100 150 1.2 50 100 200 ? ? 1k .1m voltage drop supply, v s ? o (v) relative open loop gain, a(db) ? 20 60 100 10 100 20 40 60 80 100 1.0 40 4 2.0 3.0 0 125 20 30 40 50 25 0 300 15 10 0 10k 1 m 10m frequency, f (hz) 0 300 120 10 0 10 60 70 output current, i o (ma) 140 1k 10k 1m 1k 10k 1m 120 140 200 70 30 20 50 150 100 1k 5k 20 k 2 k 200 500 10k .1m .1m 30 50 100 200 300 15 1 m 10k .1 m 20k 50k .2m .5m 2 3 5 10 20 15 7 10 1k 10k .1 m 100 case temperature, t c (?) total supply voltage, v s (v) ? 15 100 1 m .1 m 50k .2m .5m 30 60 200 300 .3m .7m 150 20 150 150 ext. compensation resistance, r c ( ) w t c = 85? t c = 25? t c = ?5? r l = 3.5 k w r c /c c = 20k /50pf w r c /c c = 2k /500pf w r c /c c = 200 /10nf w w r l = 3.5k t c = 85? t c = 25? t c = ?5? r l = 3.5k r l = 3.5k r c /c c = 200 /10nf w v s = ?50v v s = ?50v w r c / c c = 2 0 k / 5 0 p f w r c / c c = 2 k / 5 0 0 p f ww
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 32 0 operating considerations p a 84 ? p a84a ? p a84s thermal protection is a fairly slow-acting circuit and there- fore does not protect the amplifier against transient soa violations (areas outside of the t c = 25 c boundary). it is designed to protect against short-term fault conditions that result in high power dissipation within the amplifier. if the conditions that cause thermal shutdown are not removed, the amplifier 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. output protection two external diodes as shown in figure 2, are required to protect these amplifiers against flyback (kickback) pulses exceeding the supply voltages of the amplifier 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. be sure the diode voltage rating is greater than the total of both supplies. the diode will turn on to divert the flyback 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 flyback pulse must be absorbed by the power supply. as a result, a transient 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. general please read the general operating considerations sec- tion, which covers stability, supplies, heatsinking, mounting, current limit, soa interpretation, and specification interpreta- tion. additional information can be found in the application notes. for information on the package outline, heatsinks, and mounting hardware, consult the accessory and package mechanical data section of the handbook. safe operating area (soa) the bipolar output stage of this high voltage operational amplifier has two output limitations: 1. the internal current limit which limits maximum available output current. 2. the second breakdown effect, which occurs whenever the simultaneous collector current and collector-emitter voltage exceeds specified 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. the following capacitive and inductive loads are safe: v s c(max) l(max) 150v 1.2 m f .7h 125v 6.0 m f 25h 100v 12 m f 90h 75v all all 2. short circuits to ground are safe with dual supplies up to 150v or single supplies up to 150v. 3. short circuits to the supply rails are safe with total supply voltages up to 150v (i.e. 75v). stability due to its large bandwidth the pa84 is more likely to oscillate than lower bandwidth power operational amplifiers such as the pa83 or pa08. to prevent oscillations, a reasonable phase margin must be maintained by: 1. selection of the proper phase compensation capacitor and resistor. use the values given in the table under external connections and interpolate if necessary. the phase mar- gin can be increased by using a large capacitor and a smaller resistor than the slew rate optimized values listed in the table. the compensation capacitor may be connected to common (in lieu of +v s ) if the positive supply is properly bypassed to common. because the voltage at pin 8 is only a few volts below the positive supply, this ground connec- tion requires the use of a high voltage capacitor. 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 w . larger sumpoint load resistance can be used with increased phase compen- sation (see 1 above). 3. connecting the amplifier case to a local ac common thus preventing it from acting as an antenna. +v s ? s figure 1. protective, inductive load 20 30 40 50 25 35 300 200 25 0 150 170 supply to output differential voltage (v) output current from +v s or ? s (ma) t = 5ms t = 1ms safe operating area curves steady state thermal shutdown protection pa84s does not have this feature. the thermal protection circuit shuts off the amplifier when the substrate temperature exceeds approximately 150 c. this allows heatsink selection to be based on normal operating conditions while protecting the amplifier against excessive junction temperatures during temporary fault conditions. this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all specifications are subject to change without notice. pa84u rev. k december 1997 ? 1997 apex microtechnology corp.
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 321 sg parameter symbol temp. power test conditions min max units 1 quiescent current i q 25 c 150v v in = 0, a v = 100 7.5 ma 1 input offset voltage v os 25 c 150v v in = 0, a v = 100 3 m v 1 input offset voltage v os 25 c 15v v in = 0, a v = 100 5.7 mv 1 input bias current, +in +i b 25 c 150v v in = 0 50 pa 1 input bias current, Cin Ci b 25 c 150v v in = 0 50 pa 1 input offset current i os 25 c 150v v in = 0 50 pa 3 quiescent current i q C55 c 150v v in = 0, a v = 100 9.5 ma 3 input offset voltage v os C55 c 150v v in = 0, a v = 100 5 m v 3 input offset voltage v os C55 c 15v v in = 0, a v = 100 7.7 mv 3 input bias current, +in +i b C55 c 150v v in = 0 50 pa 3 input biascurrent, Cin Ci b C55 c 150v v in = 0 50 pa 3 input offset current i os C55 c 150v v in = 0 50 pa 2 quiescent current i q 125 c 150v v in = 0, a v = 100 9.5 ma 2 input offset voltage v os 125 c 150v v in = 0, a v = 100 5.5 mv 2 input offset voltage v os 125 c 15v v in = 0, a v = 100 8.2 mv 2 input bias current, +in +i b 125 c 150v v in = 0 10 na 2 input bias current, Cin Ci b 125 c 150v v in = 0 10 na 2 input offset current i os 125 c 150v v in = 0 10 na 4 output voltage, i o = 40ma v o 25 c 47v r l = 1k 40 v 4 output voltage, i o = 28.6ma v o 25 c 150v r l = 5k 143 v 4 output voltage, i o = 15ma v o 25 c 80v r l = 5k 75 v 4 current limits i cl 25 c 20v r l = 100 w 36 70 ma 4 stability/noise e n 25 c 150v r l = 5k, a v = 1, c l = 10nf 1 m v 4 slew rate sr 25 c 150v r l = 5k, c c = 50pf 100 600 v/ m s 4 open loop gain a ol 25 c 150v r l = 5k, f = 10hz 100 db 4 common mode rejection cmr 25 c 32.5v r l = 5k, f = dc, v cm = 22.5v 90 db 6 output voltage, i o = 40ma v o C55 c 47v r l = 1k 40 v 6 output voltage, i o = 28.6ma v o C55 c 150v r l = 5k 143 v 6 output voltage, i o = 15ma v o C55 c 80v r l = 5k 75 v 6 stability/noise e n C55 c 150v r l = 5k, a v = 1, c l = 10nf 1 m v 6 slew rate sr C55 c 150v r l = 5k, c c = 50pf 100 600 v/ m s 6 open loop gain a ol C55 c 150v r l = 5k, f = 10hz 100 db 6 common mode rejection cmr -55 c 32.5v r l = 5k, f = dc, v cm = 22.5v 90 db 5 output voltage, i o = 30ma v o 125 c 37v r l = 1k 30 v 5 output voltage, i o = 28.6ma v o 125 c 150v r l = 5k 143 v 5 output voltage, i o = 15ma v o 125 c 80v r l = 5k 75 v 5 stability/noise e n 125 c 150v r l = 5 , a v = 1, c l = 10nf 1 m v 5 slew rate sr 125 c 150v r l = 5k, c c = 50pf 100 600 v/ m s 5 open loop gain a ol 125 c 150v r l = 5k, f = 10hz 100 db 5 common mode rejection cmr 125 c 32.5v r l = 5k, f = dc, v cm = 22.5v 90 db burn in circuit 100k w 100k w +50v ?0v 5 6 2 1 7 60 w ** * u.u.t * * these components are used to stabilize device due to poor high frequency characteristics of burn in board. ** input signals are calculated to result in internal power dissipation of approximately 2.1w at case temperature = 125 c. http://www.apexmicrotech.com (800) 546-apex (800) 546-2739 microtechnology table 4 group a inspection PA84M this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all specifications are subject to change without notice. PA84Mu rev. f february 1998 ? 1998 apex microtechnology corp.
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