SLOSEG0A November   2025  – November 2025 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

5.5 Electrical Characteristics Log Detector 

at TA = 25°C, VCC = 2.7V to 5.25V, CIN = 100pF from Log_In to VEE, Log_Out = 10kΩ || 100pF, internal op-amp gain = 1V/V (unless otherwise mentioned)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
AC PERFORMANCE
LCE Log conformance error f = 200kHz to 100MHz ±1.8 dB
TA = –40°C to +125°C ±2 dB
DR Dynamic range LCE = ±3dB,
f = 200kHz to 30MHz		 95 dB
TA = –40°C to +125°C 95
Log Detector slope 21 23 26 mV/dB
TA = –40°C to +125°C 21 23 26
ΔLog_Out Output variation with frequency for constant  input f = 10MHz to 20MHz
Log_In = 100µV to 100mV		 ±6 mV
TA = –40°C to +125°C ±8
f = 200kHz to 30MHz
Log_In = 100µV to 100mV		 ±20
TA = –40°C to +125°C ±25
INPUT
VLog_In Typical input range LCE = ±3dB, VCC > 3V 18µ 1 VRMS
TA = –40°C to +125°C 22µ 1
Internal bias voltage: Log_In 1.5 1.7 1.9 V
Input impedance: Log_In 70 96 135 kΩ
LOG_OUT
tr Log_Out rise time 10% to 90%, f = 20MHz Log_In = 0V to 100mV 6 µs
In = 100µV to 100mV 5.8
tf Log_Out fall time 90% to 10%, f = 20MHz Log_In = 100mV to 0V 9 µs
In = 100mV to 100µV 8.5
Minimum output voltage (offset) Log_In = 100pF to VEE 90 mV
TA = –40°C to +125°C 100
INTERNAL OP-AMP (CLOAD || RLOAD = 100pF || 10kΩ)
Gain bandwidth product Internal op-amp's GBW 1.5 MHz
Minimum Gain(1) 1 V/V
Output voltage swing ILOAD = 5mA TA = –40°C to +125°C VEE + 0.2 VCC – 0.2 V
ILOAD Linear output current Source-and-sink current TA = –40°C to +125°C 5 mA
Short-circuit current Source-and-sink current TA = –40°C to +125°C 10 65 mA
POWER SUPPLY
Iq Quiescent current  Log_Out unloaded 1.5 1.8 mA
TA = –40°C to +125°C 2.1
POWER DOWN
Power down pin bias current Powered on ±250 nA
Power down pin bias current Powered off 10 µA
IPD Power down current TA = –40°C to +125°C 24 50 µA
Turn-on time Log_In = 10mVRMS, f = 1MHz 10 µs
Turn-off time Log_In = 10mVRMS, f = 1MHz 10 µs
Turn-on threshold VCC – 1.4 V
Turn-off threshold VEE + 0.9 V
(1) Internal opamp is unity gain stable