 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS PA83 * PA83A MICROTECHNOLOGY HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 FEATURES * LOW BIAS CURRENT, LOW NOISE -- FET Input * FULLY PROTECTED INPUT -- Up to 150V * WIDE SUPPLY RANGE -- 15V to 150V APPLICATIONS * HIGH VOLTAGE INSTRUMENTATION * ELECTROSTATIC TRANSDUCERS & DEFLECTION * PROGRAMMABLE POWER SUPPLIES UP TO 290V * ANALOG SIMULATORS 100K +150V 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 PA83 features an unprecedented supply range and excellent 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. 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 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 thermal isolation washers and/or improper mounting torque voids product warranty. Please see Application Note 1 "General Operating Considerations". GATED OSCILLATOR 3.57K 5V A1 PA83 -150V I= V * C t SIMPLE PIEZO ELECTRIC TRANSDUCER DRIVE TYPICAL APPLICATION While piezo electric transducers present a complex impedance, 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 shock 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 4 2 C1 D1 EXTERNAL CONNECTIONS +VS 3 2 1 4 3 Q3 Q1 Q5 Q2 Q4 C3 Q6 Q9 Q10 C4 Q12A Q13 Q12B Q11 1 BAL BAL -IN C2 OUTPUT 5 Q8 C5 Q7 TOP VIEW 5 6 8 7 Q14 6 NOTES: 1. Pin 8 not internally connected. 2. Input offset trimpot optional. Recommended value 100K . +IN Q16 Q15 Q17 N.C. -VS C6 7 D2 APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com This Material Copyrighted By Its Respective Manufacturer PA83 * PA83A ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal at TC = 25C1 INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10s max (solder) TEMPERATURE, junction TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case PA83 TEST CONDITIONS 2 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS 300V Internally Limited 17.5W 300V 300V 300C 150C -65 to +150C -55 to +125C PA83A SPECIFICATIONS PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. time BIAS CURRENT, initial3 BIAS CURRENT, vs. supply OFFSET CURRENT, initial3 OFFSET CURRENT, vs. supply INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE4 COMMON MODE REJECTION, DC GAIN OPEN LOOP GAIN at 10Hz UNITY GAIN CROSSOVER FREQ. POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING4, full load VOLTAGE SWING4 CURRENT, peak CURRENT, short circuit SLEW RATE6 CAPACITIVE LOAD, unity gain CAPACITIVE LOAD, gain > 4 SETTLING TIME to .1% POWER SUPPLY VOLTAGE CURRENT, quiescent THERMAL RESISTANCE, AC, junction to case5 RESISTANCE, DC, junction to case RESISTANCE, case to air TEMP. RANGE, case (PA83/PA83A) TEMP. RANGE, case (PA83J) NOTES: * 1. 2. 3. 4. 5. 6. F > 60Hz F < 60Hz Meets full range specification Meets full range specification -25 0 TC = -55C to +125C TC = 25C 15 Full temp. range, IO = 75mA Full temp. range, IO = 15mA TC = 25C TC = 25C TC = 25C, RL = 2K Full temperature range Full temperature range TC = 25C, RL = 2K, 10V step VS-10 VS-5 75 20 TC = 25C, RL = 2K TC = 25C, RL = 2K TC = 25C, RL = 10K Full temperature range 96 TC = 25C Full temperature range TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C TC = 25C Full temperature range Full temperature range Full temperature range MIN TYP MAX MIN TYP MAX UNITS VS-10 1.5 10 .5 75 5 .01 2.5 .01 1011 6 130 3 25 50 50 .5 5 .2 * 3 * 1.5 * * * * * 1 10 10 10 mV V/C V/V V/kh pA pA/V pA pA/V pF V dB 116 5 60 60 VS-5 VS-3 100 30 10 SOA 12 150 6 150 8.5 * 3 40 * * * * dB MHz kHz V V mA mA V/s nF F s V mA C/W C/W C/W C C * * * * * * * * * * * * * * * * 3.8 6 30 6.5 +85 70 * * * * * * The specification of PA83A is identical to the specification for PA83 in applicable column to the left. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. The power supply voltage for all tests is the TYP rating, unless otherwise noted as a test condition. Doubles for every 10C of temperature increase. +VS and -VS denote the positive and negative supply rail respectively. Total VS is measured from +VS 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 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. 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 * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739 This Material Copyrighted By Its Respective Manufacturer TYPICAL PERFORMANCE GRAPHS PA83 * PA83A 250 INTERNAL POWER DISSIPATION, P (W) 30 25 20 15 10 5 0 0 POWER DERATING CURRENT LIMIT VOLTAGE DROP FROM SUPPLY, VS-VO (V) 8 7 6 5 OUTPUT VOLTAGE SWING CURRENT LIMIT, ILIM (A) 200 150 100 50 0 -55 -25 0 25 50 75 100 125 CASE TEMPERATURE, TC (C) 0 -30 -60 TC 4 = C 5 -2 = 85 C TC = C 25 PA83J PA83/ PA83A 25 50 75 100 125 150 TEMPERATURE, T (C) TC 3 2 0 60 20 40 80 100 120 OUTPUT CURRENT IO (mA) SMALL SIGNAL RESPONSE 120 PHASE RESPONSE OUTPUT VOLTAGE, VO (VPP ) RL = 2K 300 200 POWER RESPONSE | +VS | + | -VS | = 300V RL = 2K OPEN LOOP GAIN, AOL (dB) 100 80 60 40 20 0 1 RL = 2K PHASE, () 100 60 -90 -120 -150 -180 | +VS | + | -VS | = 100V 30 -20 10 100 1K 10K 100K 1M 10M FREQUENCY, F (Hz) -210 1 10 100 1K 10K .1M 1M 10M FREQUENCY, F (Hz) 15 50K .1M .2M .3M .5M .7M 1M FREQUENCY, F (Hz) NORMALIZED SLEW RATE (X) OUTPUT VOLTAGE, VO (VP) RL = 2K 4 2 0 -2 -4 -6 -.5 RL = 2K INPUT NOISE VOLTAGE, VN (nV/ Hz) 6 PULSE RESPONSE 1.6 1.4 1.2 1.0 .8 .6 SLEW RATE VS. SUPPLY 20 15 10 INPUT NOISE 6 4 VIN = 5V, tr =100ns 0 .5 1 1.5 2.0 2.5 3.0 TIME, t (s) .4 250 300 30 50 100 150 200 TOTAL SUPPLY VOLTAGE, VS (V) 2 10 100 1K 10K FREQUENCY, F (Hz) .1M COMMON MODE REJECTION, CMR (dB) POWER SUPPLY REJECTION, PSR (dB) COMMON MODE VOLTAGE, VCM (VPP) COMMON MODE REJECTION 140 120 100 80 60 40 20 0 1 10 100 1K 10K .1M 1M FREQUENCY, F (Hz) 140 120 100 80 60 40 20 0 POWER SUPPLY REJECTION 300 200 COMMON MODE VOLTAGE | +VS | + | -VS | = 300V 100 60 | +VS | + | -VS | = 100V +VS -VS 30 1 10 100 1K 10K .1M 1M FREQUENCY, F (Hz) 15 10K 20K 50K .1M .2M .5M 1M FREQUENCY, F (Hz) APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com This Material Copyrighted By Its Respective Manufacturer PA83 * PA83A GENERAL Please read Application Note 1, which covers stability, supplies, heatsinking, mounting, current limit, SOA interpretation, and specification interpretation. 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. OPERATING CONSIDERATIONS 4. The output stage is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. 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. 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. +VS 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. 200 150 OUTPUT CURRENT FROM +VS OR -VS(mA) 100 INTERNAL CURRENT LIMIT SE C O N D t= 0. 5m t= 70 s 1m s KD t= 50 40 30 BR st ea 5m EA O W s dy N st at e -VS 20 120 150 100 200 250 300 80 INTERNAL VOLTAGE DROP, SUPPLY TO OUTPUT (V) FIGURE 1. PROTECTION, INDUCTIVE LOAD 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: VS C(MAX) L(MAX) 150V .7 F 1.5H 125V 2.0F 2.5H 100V 5.F 6.0H 75V 60F 30H 50V ALL ALL 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. 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. PA83U REV. M JANUARY 2000 (c) 2000 Apex Microtechnology Corp. This Material Copyrighted By Its Respective Manufacturer |
Price & Availability of PA83
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |