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FEATURES
* * * * * LOW COST, ECONOMY MODEL -- PA01 HIGH OUTPUT CURRENT -- Up to 5A PEAK EXCELLENT LINEARITY -- PA01 HIGH SUPPLY VOLTAGE -- Up to 30V ISOLATED CASE -- 300V
APPLICATIONS
* * * * * * MOTOR, VALVE AND ACTUATOR CONTROL MAGNETIC DEFLECTION CIRCUITS UP TO 4A POWER TRANSDUCERS UP TO 20kHz TEMPERATURE CONTROL UP TO 180W PROGRAMMABLE POWER SUPPLIES UP TO 48V AUDIO AMPLIFIERS UP TO 50W RMS
8-PIN TO-3 PACKAGE STYLE CE TYPICAL APPLICATION

DESCRIPTION
The PA01 and PA73 are high voltage, high output current operational amplifiers designed to drive resistive, inductive and capacitive loads. For optimum linearity, the PA01 has a class A/B output stage. The PA73 has a simple class C output stage (see Note 1) to reduce cost for motor control and other applications where crossover distortion is not critical and to provide interchangeability with type 3573 amplifiers. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable current limit resistors. These amplifiers are internally compensated for all gain settings. For continuous operation under load, a heatsink of proper rating is recommended. This hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and 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 washers and/or improper mounting torque will void the product warranty. Please see "General Operating Considerations".

Unidirectional Optical Speed Control
The pulse output of a non-contact optical sensor drives a voltage-to-frequency converter which generates feedback for the op amp. With the loop closed in this manner, the op amp corrects for any variations in the speed due to changing load. Because of operation in only one direction, an unsymmetrical supply is used to maximize efficiency of both power op amp and power supply. High speed diodes at the input protect the op amp from commutator noise which may be generated by the motor.
EQUIVALENT SCHEMATIC

EXTERNAL CONNECTIONS

NOTE 1: * Indicates not used in PA73. Open base of Q2A connected to output of A1.
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
PA01 * PA73
SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, within SOA POWER DISSIPATION, internal INPUT VOLTAGE, differential INPUT VOLTAGE, common-mode TEMPERATURE, junction1 TEMPERATURE, pin solder -10s TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case TEST CONDITIONS 2 TC = 25C Full temperature range TC = 25C TC = 25C TC = 25C Full temperature range TC = 25C TC = 25C Full temperature range TC = 25C TC = 25C TC = 25C Full temperature range TC = 25C, VCM = VS -6V Full temp. range, full load TC = 25C, full load TC = 25C, IO = 4A, VO = 40VPP Full temperature range TC = 25C, IO = 5A Full temp. range, IO = 2A Full temp. range, IO = 46mA TC = 25C TC = 25C, 2V step TC = 25C, RL = 2.5 Full temperature range Full temperature range Full temperature range TC = 25C F > 60Hz F < 60Hz Meets full range specifications -25 MIN PA01 TYP 5 10 35 20 15 .05 .02 12 .05 200 10 3 VS-3 110 113 1 23 45 PA01 60V 5A 67W VS -3V VS 200C 300C -65 to +150C -25 to +85C MAX 12 65 50 .4 30 MIN PA73 TYP * * * * * * * * * * * * * * * * * * * * * * * * * * 2.6 * * * * 30 5 * * * PA73 68V 5A 67W VS -3V VS 200C 300C -65 to +150C -25 to +85C MAX 10 * 200 40 * * UNITS mV V/C V/V V/W nA nA/C nA/V nA nA/C M M pF V dB dB MHz kHz V V V A s V/s nF
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply OFFSET VOLTAGE, vs. power BIAS CURRENT, initial BIAS CURRENT, vs. temperature BIAS CURRENT, vs. supply OFFSET CURRENT, initial OFFSET CURRENT, vs. temperature INPUT IMPEDANCE, common-mode INPUT IMPEDANCE, differential INPUT CAPACITANCE COMMON MODE VOLTAGE RANGE3 COMMON MODE REJECTION, DC3 GAIN OPEN LOOP GAIN at 10Hz GAIN BANDWIDTH PRODUCT @ 1MHz POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING3 VOLTAGE SWING3 VOLTAGE SWING3 CURRENT, peak SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD, unity gain CAPACITIVE LOAD, gain > 4 POWER SUPPLY VOLTAGE CURRENT, quiescent THERMAL RESISTANCE, AC, junction to case4 RESISTANCE, DC, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case
VS-6 70 91 15
* * * *
VS-10 VS-5 VS-6 VS-5 VS-5 5 2 1.0 2.6 1 SOA 10 28 20 1.9 2.4 30 25 28 50 2.1 2.6 +85
VS-8 * * * *
V mA C/W C/W C/W C
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NOTES: * The specification of PA73 is identical to the specification for PA01 in applicable column to the left. 1. Lo achieve high MTTF. 2. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition. 3. +VS and -VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to -VS. 4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
CAUTION
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
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PA01 * PA73
TYPICAL PERFORMANCE GRAPHS

APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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OPERATING CONSIDERATIONS
PA01 * PA73
1. For sine wave outputs, use Power Design1 to plot a load line. Make sure the load line does not cross the 0.5ms limit and that excursions beyond any other second breakdown line do not exceed the time label, and have a duty cycle of no more than 10%. For other waveform outputs, manual load line plotting is recommended. Applications Note 22, SOA AND LOAD LINES, will be helpful. A Spice type analysis can be very useful in that a hardware setup often calls for instruments or amplifiers with wide common mode rejection ranges. 2. EMF generating or reactive load and short circuits to the supply rail or shorts to common are safe if the current limits are set as follows at TC = 85C. VS 34V 30V 25V 20V 15V SHORT TO VS C, L, OR EMF LOAD .58A .46A .61A .86A 1.3A SHORT TO COMMON 1.1A 1.4A 1.7A 2.1A 2.9A
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The "Application Notes" and "Technical Seminar" sections contain a wealth of information on specific 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 amplifiers has three 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 specified limits. 3. The junction temperature of the output transistors.

3. The output stage is protected against occaisional transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used.
CURRENT LIMIT
Proper operation requires the use of two current limit resistors, connected as shown, in the external connection diagram. The minimum value for RCL is 0.12 ohm; 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.

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.
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Note 1. Power Design is a self-extracting Excel spreadsheet available free from www.apexmicrotech.com
This data sheet has been carefully checked and is believed to be reliable, SHANNON ROAD * is assumed ARIZONA 85741 * USA * APPLICATIONS are subject 1 (800) 546-2739 APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH however, no responsibility TUCSON, for possible inaccuracies or omissions. All specificationsHOTLINE: to change without notice.
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PA01-73U REV R MARCH 2005
(c) 2005 Apex Microtechnology Corp.

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