PA83 PA83A APEX MICROTECHNOLOGY CORPORATION + APPLICATIONS HOTLINE 800 546-APEX (800-546-2739) FEATURES LOW BIAS CURRENT, LOW NOISE FET Input * PROTECTED OUTPUT Thermal Shutoff e FULLY PROTECTED INPUT Up to +150V e WIDE SUPPLY RANGE +15V to +150V SECOND SOURCEABLE BB3583AM/JM APPLICATIONS HIGH VOLTAGE INSTRUMENTATION ELECTROSTATIC TRANSDUCERS & DEFLECTION PROGRAMMABLE POWER SUPPLIES UP TO 290V * ANALOG SIMULATORS DESCRIPTION The PA83 is a high voltage operational amplifier designed for output voltage swings up to +145V with a dual (+) supply or 290V with a single supply. Its input stage is protected against transient and steady state overvoltages up to and including 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 PA&83 features an unprecedented supply range and excel- lent supply rejection. The output stage is biased in the class A/ B mode for linear operation. Internal phase compensation assures Stability at all gain settings without need for external components. Fixed current limits protect these amplifiers against shorts to common at supply voltages up to 120V. For operation into inductive loads, two external flyback pulse protection diodes are recommended. 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 circuit utilizes beryllia (BeO) substrates, thick (cermet) film resistors, ceramic capacitors and silicon semi- conductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires pro- vide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of thermal isolation washers and/or improper mounting torque voids product warranty. Please see General Operating Considerations. EXTERNAL CONNECTIONS NOTES: 1. Pin 8 not internally connected. 2. Input offset trimpot optional. Recommended value 100KQ. 400K +150V GATteD =| 397K | OSCILLATOR [say AY PA83 |] . ~150V avec At SIMPLE PIEZO ELECTRIC TRANSDUCER DRIVE TYPICAL APPLICATION While piezo electric transducers present a complex imped- ance, they are often primarily capacitive at useful frequencies. Due to this capacitance, the speed limitation for a given transducer/amplifier combination may well stem from limited current drive rather than power bandwidth restrictions. With its drive capability of 75mA, the PA83 can drive transducers having up to 2nF of capacitance at 40kHz at maximum output voltage. In the event the transducer may be subject to shack or vibration, flyback diodes, voltage clamps or other protection networks must be added to protect the amplifier from high voltages which may be generated. EQUIVALENT SCHEMATIC APEX MICROTECHNOLOGY CORPORATION TEL (602) 690-8600 + FAX (602) 888-3329 * ORDERS (602) 690-8601 TELEX 170631 + APEX F.S.C. (602) 690-8606 E115PA83 PA83A ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS UTE MAXIM N SUPPLY VOLTAGE, +V, to -V, 300V ABSOL! IMUM RATINGS OUTPUT CURRENT, within SOA Internally Limited POWER DISSIPATION, internal at T, = 25C! 17.5W (INPUT VOLTAGE, differential +300V INPUT VOLTAGE, common mode +300V TEMPERATURE, pin solder - 10s max (solder) 300C TEMPERATURE, junction 150C TEMPERATURE RANGE, storage 65 to +150C OPERATING TEMPERATURE RANGE, case 55 to +125C SPECIFICATIONS PA83/PA83U PA83A PARAMETER TEST CONDITIONS? MIN TYP MAX; MIN TYP MAX! UNITS INPUT OFFSET VOLTAGE, initial Ty = 25C +1.5 43 5 +1 mV OFFSET VOLTAGE, vs. temperature Full temperature range +10 +25 +5 +10 pvc OFFSET VOLTAGE, vs. supply Ty = 25C 5 4.2 pviv OFFSET VOLTAGE, vs. time T. = 25C +75 * uVAkh BIAS CURRENT, initial? Ty = 25C 5 50 3 10 pA BIAS CURRENT, vs. supply T, = 25C .01 . pA/V OFFSET CURRENT, initial? T. = 25C +25 +50 +15 +10 pA OFFSET CURRENT, vs. supply To = 25C +.01 . pAV INPUT IMPEDANCE, DC Ty = 25C 10" . Q INPUT CAPACITANCE Full temperature range 6 . pF COMMON MODE VOLTAGE RANGE | Full temperature range 4Ve~10 . Vv COMMON MODE REJECTION, DC Full temperature range 130 * dB GAIN OPEN LOOP GAIN at 10Hz Ty, = 25C, R, = 2KQ 96 116 * . dB UNITY GAIN CROSSOVER FREQ. Ty = 25C, R, = 2KQ 5 3 * MHz POWER BANDWIDTH T, = 25C, R, = 10KQ 60 40 * kHz PHASE MARGIN Full temperature range 60 . OUTPUT VOLTAGE SWING, full load Full temp. range, |, = 75mA tV5-10| +V_-5 . * Vv VOLTAGE SWING Full temp. range, Ip = 15mA V.-5 | V,.-3 * * v CURRENT, peak Ty = 25C 75 * mA CURRENT, short circuit Ty = 25C 100 * mA SLEW RATE Ty = 25C, R, = 2KQ 20 30 . * V/us CAPACITIVE LOAD, unity gain Full temperature range 410 * nF CAPACITIVE LOAD, gain > 4 Full temperature range SOA * pF SETTLING TIME to .1% To = 25C, R, = 2KQ, 10V step 12 * ps POWER SUPPLY VOLTAGE T. = 55C to +125C 415 +150 | +150 * * Vv CURRENT, quiescent T, = 26C 6 B.5 * * mA THERMAL RESISTANCE, AC, junction to case F > 60Hz 3.8 . C/W RESISTANCE, DC, junction to case F < 60Hz 6 6.5 * * C/W RESISTANCE, case to air 30 * C/W TEMP. RANGE, case (PA83/PA83A) Meets full range specification -25 +85 * * C TEMP. RANGE, case (PA83J) Meets full range specification 0 70 C NOTES: * The specification of PAB3A is identical to the specification for PA83 in applicable colurnn 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. One wr The power supply voltage for all tests is the TYP rating, uniess otherwise noted as a test condition. Doubles for every 10C of temperature increase. +Vgz and V, denote the positive and negative supply rail respectively. Total V, is measured from +V. to -Vs. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz. Signal slew rates at pins 5 and 6 must be limited to fess 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 fram damage. 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. APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 E116TYPICAL PERFORMANCE GRAPHS PA83 PA83A POWER DERATING PAB3/"* PA83A 0 25 50 75 100 125 150 TEMPERATURE, T (C) INTERNAL POWER DISSIPATION, P (W) SMALL SIGNAL RESPONSE A, =2KQ @100 = 3 80 Zz 2 60 Oo a 40 g 3 20 a a 0 FREQUENCY, F (Hz) PULSE RESPONSE = R, = 2KQ = 4 > wu 2 Oo < fo o > 5-2 a 5-4 oO 6 , t, =100ns +4 TIME, t (us) COMMON MODE REJECTION bh 2 @ S&S BPR nyo fb 688s 8 & nh Qo 1 COMMON MODE REJECTION, CMR (dB) 10 100 1K 10K FREQUENCY, F (Hz) -1M 1M 0 1 10 100 1K 10K 100K 1M 10M CURRENT LIMIT nN qi o NR a o a oO = Q oO gy o CURRENT LIMIT, yaa (A) 0 ~55 -25 0 25 50 75 100 125 CASE TEMPERATURE, T, (C) PHASE RESPONSE Ri = 2KQ -60 -90 -120 PHASE, () -150 -180 -210 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) SLEW RATE VS. SUPPLY R, = 2Ko 6 NORMALIZED SLEW RATE (X) 8 4 3050 100 150 200 250 300 TOTAL SUPPLY VOLTAGE, Vs (V) 0 POWER SUPPLY REJECTION -V, Ss POWER SUPPLY REJECTION, PSR (dB) 1 10 100 1K 10K FREQUENCY, F (Hz) -1M 1M OUTPUT VOLTAGE SWING 0 20 40 60 80 OUTPUT CURRENT Ig (mA} 100 120 VOLTAGE DROP FROM SUPPLY, VsVo (V) POWER RESPONSE 300 J ~ 200 | 4Vg | + |-Vg | = 300V | Ay = 2KQ oO > 100 \ 2 \ 5 60 > [avsl|-Vel= nV z 30 a NJ & = 3 IN 15 N 50K 1M .2M 3M .5M.7M1M FREQUENCY, F (Hz) INPUT NOISE w 20 = = 45 > e Z iof ui 2 r 6 > wo 4 5 z rE a = 10 100 1K 10K .iM FREQUENCY, F (Hz) = 300 COMMON MODE VOLTAGE | +5 | +] -Vg | = 300V = Q o Q Oo 4Vg 1 4|-Vg |= w oO 15 10K 20K 50K .1M .2M .5M 1M FREQUENCY, F (Hz) COMMON MODE VOLTAGE, Voy (Vpp nN Ww APEX MICROTECHNOLOGY CORPORATION TEL (602) 690-8600 FAX (602) 888-3329 ORDERS (602) 690-8601 + TELEX 170631 * APEX F.S.C. (602) 690-8606 E117PA83 PA83A OPERATING CONSIDERATIONS 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 amplifier has two distinct 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 exceed specified limits. 200 on o INTERNAL CURRENT LIMIT Qo oO ~s o OUTPUT CURRENT FROM +Vg OR Vg(mA) sa oO 40 30 J J 20 80 100 120 150 200 250 = 300 INTERNAL VOLTAGE DROP, SUPPLY TO OUTPUT (V) 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: iV, C(MAX) L(MAX) 150V 7E 1.5H 12 2.0nF 2.5H 100V 5. uF 6.0H 75V 60uF XH 5OV AL AL 2. Short circuits to ground are safe with dual supplies up to 120V or single supplies up to 120V. 3. Short circuits to the supply rails are safe with total supply voltages up to 120V, e.g. +60V. 4, The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. THERMAL SHUTDOWN PROTECTION The thermal protection circuit shuts off the amplifier when the substrate temperature exceeds approximately 150C. This allows heatsink selection to be based on normal operating conditions while protecting the amplifier against excessive junction temperature during temporary fault conditions. 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, = 25C 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, destroy signal integrity, and reduce the reliability of the device. INDUCTIVE LOADS Two external diodes as shown in Figure 1, 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. The diode will turn on to divert the flyback energy into the supply rails thus protecting the output transistors from destruc- tion due to reverse bias. Anote 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. +Vs A 1N4936 OR MUR140 Dw wr Vz FIGURE 1. PROTECTION, INDUCTIVE LOAD PASS REN J SEPTEMBER 1993 E118 = 1993 Apes Microtechnulegy Corp