+9V; 600mW; 50MHz, 80dB demodulating logarithmic amplifier with limiter output. For ultrasound and sonar processing, phase-stable limiting amplifier to 100MHz, received signal strength indicator (RSSI)
The AD606 can operate above and below these limits, with reduced linearity, to provide as much as 90 dB of conversion range. A second low-pass filter automatically nulls the input offset of the first stage down to the submicrovolt level. Adding external capacitors to both filters allows operation at input frequencies as low as a few hertz. The AD606's limiter output provides a hard-limited signal output as a differential current of 1.2 mA from open-collector outputs. In a typical application, both of these outputs are loaded by 200 resistors to provide a voltage gain of more than 90 dB from the input. Transition times are 1.5 ns, and the phase is stable to within 3 at 10.7 MHz for signals from 75 dBm to +5 dBm.