PA08A Apex Microtechnology

PA08 PA08A RoHS Power Operational Amplifier COMPLIANT FEATURES Wide Supply Range 15V to 150V Programmable Output Current Limit Output Current Up to 150mA Low Bias Current FET Input APPLICATIONS High Voltage Instrumentations Electrostatic Transducers & Deflection Programmable Power Supplies up to 290V Analog Simulators 4 - 20mA DESCRIPTION The PA08 is a high voltage operational amplifier designed for output voltage swings of up to 145V with a dual () supply or 290V with a single supply. High accuracy is achieved with a cascode input circuit configu- ration. All internal biasing is referenced to a zener diode fed by a FET constant current source. As a result, the PA08 features an unprecedented supply range and excellent supply rejection. The output stage is biased-on for linear operation. Internal phase compensation assures stability at all gain settings. The safe operating area (SOA) can be observed with all types of loads by choosing the appropriate current limiting resistors. For oper- ation into inductive loads, two external flyback pulse protection diodes are recommended. A heatsink may be necessary to maintain the proper case temperature under normal operating conditions. This hybrid integrated circuit utilizes beryllia (BeO) substrate, thick film 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 isolation washers and/or improper mounting torque will void the product warranty. Please see Application Note 1, General Operating Considerations. Figure 1: Equivalent Schematic 3 7 D1 C1 Q1 Q2 Q3 Q4 C3 Q6 Q5 2 Q7 Q8 Q9 C2 1 Q10 Q19 C4 Q11 5 8 Q12A Q12B Q17 4 Q16 Q15 D2 6 Apex Microtechnology Inc. JAN 2018 www.apexanalog.com All rights reserved PA08U Rev QPA08 PA08A TYPICAL CONNECTIONS Figure 2: Typical Connections R = ( +V + -V ) R /1.6 S S S T R F +V S 100nF * R R I CL+ +V S V OUT + +CL OUT PA08 -CL R BAL CL- -V S R L R S R T 100nF * -V S Note: Input offset voltage trim optional. R = 10 k MAX. T * Use 10F per Amp of output current. 2 PA08U Rev Q