Power Operational Amplifier FEATURES • HIGH INTERNAL DISSIPATION — 400 Watts • HIGH CURRENT — 40A Continuous, 100A PEAK • HIGH SLEW RATE — 50V/µs • OPTIONAL BOOST VOLTAGE INPUTS APPLICATIONS • SEMI-CONDUCTOR TESTING The PA50 is a MOSFET power operational amplifier that extends the performance limits of power amplifiers in slew rate and power bandwidth, while maintaining high current and power dissipation ratings. Boost voltage inputs allow the small signal portion of the amplifier to operate at a higher voltage than the high current output stage. The amplifier is then biased to achieve close linear swings to the supply rails at high currents for extra efficient operation. The JEDEC MO-127 12-pin Power Dip™ package (see Package Outlines) is hermetically sealed and isolated from the internal circuits. The use of compressible thermal washers and/or improper mounting torque will void the product warranty. Please see “General Operating Considerations” . EQUIVALENT SCHEMATIC Copyright © Apex Microtechnology, Inc. 2012 (All Rights Reserved) +OUT +OUT

INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs. supply BIAS CURRENT, initial BIAS CURRENT vs. supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC IMPUT CAPACITANCE COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION,DC INPUT NOISE GAIN OPEN LOOP,@ 15Hz GAIN BANDWIDTH PRODUCT POWER BANDWIDTH OUTPUT VOLTAGE SWING VOLTAGE SWING, PA50 VOLTAGE SWING, PA50A CURRENT, peak SETTLING TIME TO.1% SLEW RATE RESISTANCE POWER SUPPLY VOLTAGE, ±VBOOST VOLTAGE, ±VS CURRENT,quiescent, boost supply CURRENT, quiescent, total THERMAL RESISTANCE,AC,junction to case3 RESISTANCE,DC,junction...

SMALL SIGNAL GAIN COMMON MODE REJECTION, CMR (dB) SMALL SIGNAL PHASE RL = 4Ω COMMON MODE REJECTION 0 OPEN LOOP PHASE, Ф (°) VOLTAGE DROP FROM SUPPLY, VS – VO (V) POWER SUPPLY REJECTION QUIESCENT CURRENT POWER RESPONSE OUTPUT VOLTAGE SWING POWER SUPPLY REJECTION, PSR (dB) NORMALIZED QUIESCENT CURRENT, IQ (X) INTERNAL POWER DISSIPATION, P(W) POWER DERATING OPEN LOOP GAIN RESPONSE, A (dB) SAFE OPERATING AREA t= 1m s t= DC 10 DC T ms C T = 25 DC ° C = 85 C T °C C = 12 5° C 1 10 100 SUPPLY TO OUTPUT DIFFERENTIAL, (V)

PA50 • PA50A 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 design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; Apex Microtechnology’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits. the high current output stage. An additional 10V on the VBOOST pins is sufficient to allow the small signal stages...