SLOSEG0A November   2025  – November 2025 LOG305

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Pin Configuration and Functions
  6. 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. Parameter Measurement Information
  8. 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. 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. 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

Typical Characteristics: VCC = 3.6V

at TA = 25°C, VCC = 3.6V, Internal opamp configured in gain G = 1V/V, CLOAD = 100pF, RLOAD= 10kΩ, and CIN= 100pF capacitor to VEE on Log_In (unless otherwise noted)

LOG305 Output at Various Frequencies
 
Figure 5-1 Output at Various Frequencies
LOG305 Output as Various Temperature Points
f = 1MHz
Figure 5-3 Output as Various Temperature Points
LOG305 Output Response for
                        Different Input Waveforms
f = 1MHz
Figure 5-5 Output Response for Different Input Waveforms
LOG305  Minimum Output Voltage
                        (Offset)
Log_In is connected to ground via 100pF Cap
Figure 5-7 Minimum Output Voltage (Offset)
LOG305 Log Conformance Error
f = 1MHz, μ = 1.4dB, σ = 0.05dB
Figure 5-9 Log Conformance Error
LOG305 Rise and Fall Time
f = 1MHz, tr= 6μs and tf= 10μs
Figure 5-11 Rise and Fall Time
LOG305 Overdrive Recovery
 f = 1MHz, Log_In = 3.6VP
Figure 5-13 Overdrive Recovery
LOG305 Minimum Log_Out Voltage vs Time
Log_In is connected to ground via 100pF Cap
Figure 5-15 Minimum Log_Out Voltage vs Time
LOG305 Start-Up Time for Supply Ramp- Up
Log_In = 10mVRMS, f = 1MHz
Figure 5-17 Start-Up Time for Supply Ramp- Up
LOG305 Turn-On Time for Log_En Ramp- up
Log_In = 10mVRMS, f = 1MHz
Figure 5-19 Turn-On Time for Log_En Ramp- up
LOG305 Log
                        Conformance Error for Different Frequencies
 
Figure 5-2 Log Conformance Error for Different Frequencies
LOG305 Log
                        Conformance Error for Different Temperature Points
f = 1MHz
Figure 5-4 Log Conformance Error for Different Temperature Points
LOG305 Slope
                        (Log_Out/Log_In) Variation vs Supply
f = 1MHz
Figure 5-6 Slope (Log_Out/Log_In) Variation vs Supply
LOG305  Slope Histogram
f = 1MHz, μ = 22.94mV/dB, σ = 0.18mV/dB
Figure 5-8 Slope Histogram
LOG305  Minimum 3dB Input
                        Sensitivity
f = 1MHz, μ = 15.68μVRMS, σ = 0.63μVRMS
Figure 5-10 Minimum 3dB Input Sensitivity
LOG305 Rise and Fall Time
f = 20MHz, tr= 6μs and tf= 8μs
Figure 5-12 Rise and Fall Time
LOG305 Slope
                        Variation at Different Frequencies
Figure 5-14 Slope Variation at Different Frequencies
LOG305 Output Variations
Log_In = 100mVRMS
Figure 5-16 Output Variations
LOG305 Turn-Off Time for Supply Ramp- Down
Log_In = 10mVRMS, f = 1MHz
Figure 5-18 Turn-Off Time for Supply Ramp- Down
LOG305 Turn-Off Time for Log_En Ramp- Down
Log_In = 10mVRMS, f = 1MHz
Figure 5-20 Turn-Off Time for Log_En Ramp- Down