AD8307 Logarithmic Amplifier

AD8307 Logarithmic Amplifier

The AD8307 is the first logarithmic amplifier made available in an 8-lead SOIC_N package. It is a complete 500 MHz monolithic demodulating logarithmic amplifier based on the progressive compression (successive detection) technique, providing a dynamic range of 92 dB to ±3 dB law conformance and 88 d.

Features

Complete multistage logarithmic amplifier 92 dB dynamic range: −75 dBm to +17 dBm to −90 dBm using matching network Single supply of 2.7 V minimum at 7.5 mA typical DC to 500 MHz operation, ±1 dB linearity Slope of 25 mV/dB, intercept of −84 dBm Highly stable scaling over temperature Fully differential dc-coupled signal path 100 ns power-up time, 150 μA sleep current APPLICATIONS Conversion of signal level to decibel form Transmitter antenna power measurement Receiver signal strength indication (RSSI) Low cost radar and sonar signal processing Network and spectrum analyzers (to 120 dB) Signal .