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.