1 Features
• Input Range: 18μVRMS to 1VRMS
• Temperature: –40°C to +125°C
• Dynamic range: 95dB
• Log conformance error (LCE) = ±2dB
• Signal detection from 200kHz to 100MHz
• Quiescent current: 2.1mA max across temperature
• Supply: 2.7V to 5.25V
• Integrated Op Amp for buffering / gain adjustment

2 Applications
• Ultrasonic distance and material sensing
• Flow cytometry
• ESD and high energy EMI signal detection
• ARC fault detection

3 Description
The LOG305 is a Log Detector / RSSI Detector with
very low power consumption. This device supports an
input frequency from 200kHz to 100MHz and a typical
dynamic range of 95dB. The LOG305 can support
beyond these frequencies at reduced sensitivity. The
LOG305 is intended for use in applications that
require a wide dynamic range of voltage and signal
measurement. This device supports single ended
inputs and unipolar or bipolar supplies.
The LOG305 is available in a 6-pin DRV package.
The LOG305 is operational from a 2.7V to 5.25V
supply and over the full ambient temperature range
of –40°C to +125°C.