SBOSA42 June   2024 OPA596

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Mux-Friendly Inputs
      2. 6.3.2 Thermal Protection
      3. 6.3.3 Slew Boost
      4. 6.3.4 Overload Recovery
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Bridge-Connected Piezoelectric Driver
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
      2. 7.2.2 DAC Output Gain and Buffer
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
      3. 7.2.3 Single-Supply Piezoelectric Driver
      4. 7.2.4 High-Side Current Sense
      5. 7.2.5 High-Voltage Instrumentation Amplifier
      6. 7.2.6 Composite Amplifier
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Thermal Considerations
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Tape and Reel Information

7.2.1.1 Design Requirements

The OPAx596 is used to drive a piezoelectric actuator with a 100V operating range at a frequency of 100Hz. The large capacitance inherent to the piezoelectric actuator can cause undesired ringing of the driver amplifier. An inaccurate response of the actuator is possible due in part to amplifier instability. Adequate phase margin for a 500nF equivalent load is necessary for a robust driver circuit for the piezoelectric actuator presented here.

Table 7-1 Design Parameters
PARAMETER VALUE
Positive supply voltage 60V
Negative supply voltage –5V
Piezoelectric actuator capacitance (1kHz) 500nF
Piezoelectric operating voltage range 0V to 100V
Operating frequency 100Hz
DAC output voltage 5VPP