Apex Microtechnology PA169 Dual High Voltage Operational Amplifiers

Introduction

The Apex Microtechnology PA169 is a dual-channel high-voltage operational amplifier designed for demanding analog power-control and signal-conditioning applications. Combining two independent amplifier channels in one compact 52-pin QFP package, it supports high-voltage operation while providing substantial peak output current capability.

Part Description

The PA169 contains two independent operational amplifier channels rated for operation up to 200 V and capable of delivering up to 4 A peak output current. Its architecture includes a monolithic MOS input stage, helping provide high input impedance for precision analog control and sensing circuits.

Each channel uses a MOSFET push-pull output stage, allowing it to source and sink current for driving capacitive, inductive, or resistive loads. The device also includes current limiting and an over-current flag to support fault monitoring and improve protection in high-power designs.

Additional control features include output disable functionality, which can be useful for safely shutting down an output channel during standby, fault, sequencing, or system-control conditions. Optional external phase compensation gives designers flexibility to optimize stability and bandwidth based on the connected load and application requirements.

Applications

Potential applications for the PA169 include:

• High-voltage analog signal amplification
• Piezoelectric actuator and transducer drivers
• Precision motion-control systems
• Industrial valve and solenoid control
• Programmable power supplies
• High-voltage waveform generation
• Test and measurement equipment
• Capacitive load drivers
• Electromagnetic actuator control
• High-voltage current sources
• Audio and ultrasound transducer systems
• Sensor excitation and conditioning circuits

Industries

The PA169 may be used in a range of industries, including:

• Industrial automation
• Test and measurement
• Aerospace and defense
• Medical equipment
• Semiconductor manufacturing
• Scientific research
• Energy and power systems
• Robotics and motion control
• Telecommunications infrastructure
• Laboratory instrumentation

Usage Ideas

1. Dual Piezo Positioning Driver
   Use both amplifier channels to drive separate piezoelectric actuators in a precision positioning platform, such as an optical alignment or micro-positioning system.

2. High-Voltage Programmable Current Source
   Build a controlled current source for laboratory testing, material characterization, or actuator evaluation using one channel as the control amplifier and the other for an additional output path.

3. Industrial Bipolar Actuator Controller
   Create a high-voltage driver stage for controlling proportional valves, solenoids, or other industrial actuators requiring fast bipolar output signals.

Conclusion

The Apex Microtechnology PA169 is a versatile dual high-voltage operational amplifier for applications requiring high output voltage, peak current capability, and flexible control features. Its dual-channel architecture, MOS input stage, push-pull MOSFET outputs, current limiting, output-disable function, and optional compensation make it well suited to advanced industrial, instrumentation, motion-control, and high-voltage analog designs.