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1 Features

? Input range:

– LNA + log detector: 7μVP to 200mVP

– Log detector: 20μVP to 1.6VP

? Adjustable output to input slope and response

time.

? Dynamic range: 98dB with log conformance error

(LCE) = ±1dB

? Signal detection up to 40MHz; even higher with

reduced LCE

? Input frequency detection, zero cross detect

? Supply: 3V to 5.25V

2 Applications

? Ultrasonic distance and material sensing

? Flow cytometry

? ESD and high energy EMI signal detection

? Energy detection

? Bubble, occlusion detection

3 Description

The LOG300 is an integrated analog front end

(AFE) consisting of low-noise amplifier (LNA) and

a Log Detector block. This device supports an

input frequency range of up-to 40MHz and a typical

dynamic range of 98dB. The LOG300 is intended

for use in applications that require a wide dynamic

range of voltage and signal measurement. The Log

Detector block of LOG300 supports both single-ended

and differential inputs. The low input noise of the

integrated LNA, allows measurement of signals as

low as 7μVP. The transient output response can be

adjusted by tuning the capacitor connected at the

Log_Out pin. The integrated frequency detect feature

of LOG300 enables users to extract input signal

frequency and zero-crossing information.

The LOG300 is available in a 16-pin SOIC and 16-pin

VQFN package. The LOG300 is operational from a 3V

to 5.25V supply and over the full ambient temperature

range of –40°C to +125°C.