SLOSEG0B November   2025  – July 2026 LOG305

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 Log Detector 
    6. 5.6 Typical Characteristics: VCC = 3.6V
    7. 5.7 Typical Characteristics: VCC = 5.25V
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Gain
    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 Energy Detection
        1. 8.2.1.1 Detailed Design Procedure
        2. 8.2.1.2 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    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

7.1 Overview

The LOG305 is a highly sensitive analog signal measurement block for power measurements from 200kHz to 100MHz signals with a typical dynamic range of 95dB. The LOG305 is intended for use in a wide variety of applications like ultrasonic Rx signal chains, amplitude demodulation, signal power measurement and grid monitoring. The LOG305 provides an envelope at the output of an amplitude proportional to the log of the input signal. This behavior provides the application circuit precise input signal amplitude measurement without the need of high-speed signal acquisition components.