40MHz logarithmic detector with integrated low-noise amplifier

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 from 50Hz 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

LogOut 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.