PA94 Apex Microtechnology

PA94 RoHS High Voltage Power Operational Amplifiers COMPLIANT FEATURES High Voltage 900V (450V) High Slew Rate 500V/s Output Current 100mA Programmable Current Limit APPLICATIONS High Voltage Instrumentation Programmable Power Supplies up to 430V Mass Spectrometers Semiconductor Measurement Equipment DESCRIPTION The PA94 is a high voltage, MOSFET operational amplifier designed as a low cost solution for driving con tinuous output currents up to 100mA and pulse currents up to 200mA into capacitive loads. The safe operat ing area (SOA) has no second breakdown limitations and can be observed for all load types by choosing an appropriate current limiting resistor. The MOSFET output stage is biased AB for linear operation. External compensation provides flexibility in choosing bandwidth and slew rate for the application. Apex Microtech nologys Power SIP uses a minimum of board space allowing for high density circuit boards. The Power SIP is electrically isolated. Isolating thermal washers (TW13) prevent arcing from pins to heatsink. Figure 1: Equivalent Schematic 12 +V S R1A C2 R3 R1B Q3 Q1 Q2 R4 Q4 Q6 6 I C 2 CL 4 C Q5 8 Q8 C 1 C R7 Q15B Q15A Q11 1 7 R10 R9 IN OUT Q21 R11 R12 Q29 Q14 2 R19 +IN Q30 Q29 R20 R27 V S 10 Apex Microtechnology Inc. Oct 2018 www.apexanalog.com All rights reserved PA94U Rev RPA94 TYPICAL CONNECTION Figure 2: Typical Connection R F 100k +V S * 100nF R C C C R F +V S V OUT R C + 1k C C PA94 C L -V S R L R CL -V S * Use 10F per Amp of Output Current. 100nF * 2 PA94U Rev R