PA90 Apex Microtechnology

PA90 RoHS High Voltage Power Operational Amplifiers COMPLIANT FEATURES High Voltage 400V (200V) Low Quiescent Current 10mA High Output Current 200mA Programmable Current Limit High Slew Rate 300V/s APPLICATIONS Piezoelectric Positioning High Voltage Instrumentation Electrostatic Transducers Programmable Power Supplies up to 390V DESCRIPTION The PA90 is a high voltage, low quiescent current MOSFET operational amplifier designed as a low cost solution for driving continuous output currents up to 200mA and pulse currents up to 350mA. The safe oper- ating area (SOA) has no second breakdown limitations and can be observed for all type loads 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 package uses a minimum of board space allowing for high density circuit boards. The 12- pin Power SIP is electrically isolated. Apex Microtechnology Inc. Dec 2019 www.apexanalog.com All rights reserved PA90U Rev RPA90 EQUIVALENT SCHEMATIC Figure 1: Equivalent Schematic 12 11 +V S R1 R2 C1 R3 Q3 Q1 Q2 R4 Q4 Q6 5 I CL CC2 9 4 Q5 Q8 CC1 R7 10 Q14A Q14B Q11 1 6 R6 R5 IN OUT Q13 R8 R9 Q12 3 I Q17 Q 2 R10 +IN Q16 Q15 R11 R12 V S 7 8 TYPICAL CONNECTIONS Figure 2: Typical Connection R F 100 k +V S * 100nF R C C C R I +V S V OUT R C + 1 k C C PA90 CL I Q -V S R L NC RCL -V S * Use 10F * 100nF per Amp of Output Current 2 PA90U Rev R