PA02
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PA02 • PA02A Power Operational Amplifiers High Power Bandwidth — 350 kHz High Slew Rate — 20V/µs Fast Settling Time — 600ns Low Crossover Distortion — Class A/B Low Internal Losses — 1.2V at 2A High Output Current — ±5A Peak Low Input Bias Current — FET Input Isolated Case — 300 VDC Motor, Valve and Actuator Control Magnetic Deflection Circuits up to 5A Power Transducers up to 350 kHz Audio Amplifiers up to 30w RMS DESCRIPTION The PA02 and PA02A are wide-band, high output current operational amplifiers designed to drive resistive, inductive and capacitive loads. Their complementary “collector output” stage can swing close to the supply rails and is protected against inductive kickback. For optimum linearity, the output stage is biased for class A/B operation. The safe operating area (SOA) can be observed for all operating conditions by selection of user programmable, current limiting resistors (down to 10mA). Both amplifiers are internally compensated but are not recommended for use as unity gain followers. For continuous operation under load, mounting on a heatsink of proper rating is recommended. These hybrid integrated circuits utilize 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. Isolation washers are not recommended. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see Application Note 1 “General Operating Considerations.”

PA02 • PA02A TYPICAL CONNECTIONS Figure 1: Typical Connections PINOUT AND DESCRIPTION TABLE Figure 2: External Connections Connect to the sourcing current limit resistor, and then the +Vs pin. Power supply current flows into this pin through RCL+. The positive supply rail. The output. Connect this pin to load and to the feedback resistors. (Pins 3 and 4 are internally connected). The negative supply rail. Connect to the sinking current limit resistor, and then the -Vs pin. Power supply current flows out of this pin through RCL-.

PA02 • PA02A SPECIFICATIONS The power supply voltage for all specifications is the TYP rating unless otherwise noted as a test condition. Full temperature specifications are guaranteed but not 100% tested. The absolute maximum negative input voltage is equal to the negative power supply voltage plus 1V (-Vs + 1V). ABSOLUTE MAXIMUM RATINGS Parameter Output Current, within SOA Power Dissipation, internal 1 Supply Voltage, total Input Voltage, differential Input Voltage, common mode Temperature, pin solder, 10s max. Temperature, junction 1 Temperature Range, storage Operating Temperature...

PA02 • PA02A INPUT Test Conditions Offset Voltage, initial Offset Voltage vs. temperature Full temp range 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 Capacitance Common Mode Voltage Range , Pos. Full temp range Common Mode Voltage Range 1, Neg. Full temp range Common Mode Rejection, DC Full temp range 1. Exceeding CMV range can cause the output to latch. GAIN Parameter Test Conditions Open Loop Gain @ 10 Hz Full temp range, 10 kΩ load Gain Bandwidth...

Test Conditions Full temp range, ±VS –2 ±VS–1.2 IO = 2A Current, peak Slew Rate Capacitive Load Full temp range, AV > 10 Harmonic Distortion Small Signal rise/fall time Small Signal overshoot 1. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS. Test Conditions Full temp range Current, Quiescent THERMAL Parameter Test Conditions Resistance, DC junction to case Resistance, junction to air Temperature Range, case 30 Meets full range specifications 1. Rating applies if the output current alternates between both output transistors at a...

TYPICAL PERFORMANCE GRAPHS Figure 3: Power Derating Figure 6: Phase Response

PA02 • PA02A Figure 7: Current Limit Figure 8: Power Response Current Limit, ILIM (A) Figure 9: Bias Current Figure 10: Common Mode Rejection Normalized Bias Current, IB (X)

PA02 • PA02A Figure 11: Power Supply Rejection Figure 12: Input Noise 40 Input Noise Voltage, en ( Figure 14: Settling Time Normal Quiescent Current, IQ (X) Figure 13: Quiescent Current Output Change From Zero (V)

Figure 15: Harmonic Distortion Figure 16: Pulse Response

PA02 • PA02A SAFE OPERATING AREA (SOA) The SOA curves combine the effect of all limits for this Power Op Amp. 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. The following guidelines may save extensive analytical efforts: 1. Under transient conditions, capacitive and dynamic* loads up to the following maximums are safe: CAPACITIVE LOAD INDUCTIVE LOAD ±VS ILIM = 5A ILIM = 2A ILIM = 5A ILIM = 2A 18V * If the...

PA02 • PA02A 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.apexanalog.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. TYPICAL APPLICATION LOW INTERNAL LOSS MAXIMIZES EFFICIENCY When system voltages are low and power is at a premium, the PA02 is a natural choice. The circuit below utilizes not only the feature of low internal loss of the PA02, but also its very...

PA02 • PA02A 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. 0.65V R CL    = ------------------I LIM  A  Where: ILIM is the current limit in amperes RCL is the current limit resistor value in ohms Refer to Application Note 1 “General Operating Considerations” section of the handbook for current limit adjust details. DEVICE MOUNTING The case (mounting flange) is electrically isolated and should...