SBOS233H March   2002  – October 2025 OPA2354 , OPA354 , OPA4354

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information OPA354
    5. 6.5 Thermal Information OPA2354
    6. 6.6 Thermal Information OPA4354
    7. 6.7 Electrical Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operating Voltage
      2. 7.3.2 Rail-to-Rail Input
      3. 7.3.3 Rail-to-Rail Output
      4. 7.3.4 Output Drive
      5. 7.3.5 Video
      6. 7.3.6 Driving Analog-to-Digital Converters
      7. 7.3.7 Capacitive Load and Stability
      8. 7.3.8 Wideband Transimpedance Amplifier
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Optimizing the Transimpedance Circuit
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Power Dissipation
        2. 8.4.1.2 Thermally Enhanced PowerPAD Integrated Circuit Package
        3. 8.4.1.3 PowerPAD™ Integrated Circuit Package Assembly Process
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.2 Rail-to-Rail Input

The specified input common-mode voltage range of the OPAx354 extends 100mV beyond the supply rails. This extended range is achieved with a complementary input stage: an N-channel input differential pair in parallel with a P-channel differential pair, as shown in the Section 7.2. The N-channel pair is active for input voltages close to the positive rail, typically (V+) − 1.2V to 100mV greater than the positive supply, while the P-channel pair is on for inputs from 100mV less than the negative supply to approximately (V+) − 1.2V. There is a small transition region, typically (V+) − 1.5V to (V+) − 0.9V, in which both pairs are on. This 600mV transition region vary ±500 mV with process variation. Therefore, the transition region (both input stages on) range from (V+) − 2V to (V+) − 1.5V on the low end, up to (V+) − 0.9V to (V+) − 0.4V on the high end.

A double-folded cascode adds the signal from the two input pairs and presents a differential signal to the class AB output stage.