SBOSA28B August   2023  – August 2026 LOG200

PRODUCTION DATA  

  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
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 High Speed, Logarithmic Current-to-Voltage Conversion
      2. 6.3.2 Voltage and Current References
      3. 6.3.3 Adaptive Photodiode Bias
      4. 6.3.4 Auxiliary Operational Amplifier
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Logarithmic Transfer Function
        1. 7.1.1.1 Logarithmic Conformity Error
        2. 7.1.1.2 Error Analysis Example
    2. 7.2 Typical Application
      1. 7.2.1 Optical Current Sensing
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

1 Features

  • Ultra-fast transient response to low current levels:
    • Settling time for 10nA to 100nA step:
      240ns rising, 620ns falling (typ)
    • Settling time for 100nA to 1μA step:
      60ns rising, 150ns falling (typ)
  • Wide dynamic range: 10pA to 10mA (180dB)
    • Specified from 100pA to 10mA (160dB)
  • High signal bandwidth:
    • 20MHz at 10µA to 10mA
    • 6.3MHz at 1μA
    • 90kHz at 1nA
  • High-accuracy transfer function:
    • 0.2% max log conformity error (10nA to 100µA)
  • Integrated reference current (1μA) and reference voltages (2.5V and 1.65V)
  • Additional auxiliary high-speed op amp for differential ADC drive, single-ended gain or filter blocks, and other peripheral functions
  • Single supply (4.5V to 12.6V) or
    dual supply (±2.25V to ±6.3V) operation
  • Specified temperature range: –40°C to +125°C
  • Small package options:
    • 3mm × 3mm VQFN
    • 1.6mm × 1.6mm DSBGA