Datasheet PA94 (Apex)

PA94 High Voltage Power Operational Amplifiers RoHS
COMPLIANT
FEATURES
• High Voltage— 900V (±450V) • High Slew Rate — 500V/µs • 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‐ nology’s 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 +VS R1A R1B C2 R3 Q3 Q1 Q2 R4 Q4 Q6 6 C 2 ICL 4 C Q5 C 1 Q8 8 C R7 Q15A Q15B Q11 1 7 R9 –IN R10 OUT Q21 R11 R12 Q29 Q14 2 R19 +IN Q30 Q29 R20 R27 –VS 10 © Apex Microtechnology Inc. Oct 2018 www.apexanalog.com All rights reserved PA94U Rev R Document Outline PA94 Features Applications Description Figure 1: Equivalent Schematic Typical connection Figure 2: Typical Connection Pinout and Description Table Figure 3: External Connections Specifications Absolute Maximum Ratings Input Gain Output Power Supply Thermal Typical Performance Graphs Safe Operating Area (SOA) Figure 12: SOA General Typical Application Figure 13: Typical Application Phase Compensation Internal Power Dissipation And Heatsink Selection Current Limit Common Mode Input Range Input Protection Figure 14: Overvoltage Protection Power Supply Protection Stability External Components Cautions Package Options Package Style DQ