PA119CE PA119CEA RoHS Video Power Operational Amplifier COMPLIANT FEATURES Very Fast Slew Rate 900 V/s Power MOS Technology 4A peak rating Low Internal Losses 0.75 V at 2A Protected Output Stage Thermal Shutoff Wide Supply Range 15 V to 40 V APPLICATIONS Video Distribution And Amplification High Speed Deflection Circuits Power Transducers up to 5 MHz Modulation of Rf Power Stages Power LED or Laser Diode Excitation DESCRIPTION The PA119 is a high voltage, high current operational amplifier optimized to drive a variety of loads from DC through the video frequency range. Excellent input accuracy is achieved with a dual monolithic FET input transistor which is cascaded by two high voltage transistors to provide outstanding common mode character- istics. All internal current and voltage levels are referenced to a zener diode biased on by a current source. As a result, the PA119 exhibits superior DC and AC stability over a wide supply and temperature range. High speed and freedom from second breakdown is assured by a complementary power MOS output stage. For optimum linearity, especially at low levels, the power MOS transistors are biased in a class A/B mode. Thermal shutoff provides full protection against overheating and limits the heatsink requirements to dissipate the internal power losses under normal operating conditions. A built-in current limit of 0.5A can be increased with the addition of two external resistors. Transient inductive load kickback protection is provided by two internal clamping diodes. External phase compensation allows the user maximum flexibility in obtain- ing the optimum slew rate and gain bandwidth product at all gain settings. A heatsink of proper rating is rec- ommended. This hybrid circuit utilizes thick film (cermet) 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 washers and/or improper mounting torque will void the product warranty. Please see Application Note 1 General Operating Considerations. Apex Microtechnology Inc. Aug 2021 www.apexanalog.com All rights reserved PA119U Rev JPA119CE PA119CEA Figure 1: Equivalent Schematic 3 Q1 Q2 Q4 Q3 2 Q7 Q5 Q8 8 Q9 Q10 Q11 Q15 1 Q13 Q12 Q16 D1 Q19 Q20 5 Q17B Q17A Q21 4 Q22 7 Q23 Q24 Q25 D2 6 2 PA119U Rev J