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 level determination down to 20 Hz True decibel ac mode for multimeters