AD8306ARZ (ANALOG DEVICES)

The AD8306ARZ is a complete IF Limiting Amplifier providing both an accurate logarithmic (decibel) measure of the input signal (the RSSI function) over a dynamic range of 100dB and a programmable limiter output, useful from 5 to 400MHz. It is easy to use, requiring few external components. A single supply voltage of +2.7 to +6.5V at 16mA is needed, corresponding to a power consumption of under 50mW at 3V, plus the limiter bias current, determined by the application and typically 2mA, providing a limiter gain of 90dB when using 200W loads. A CMOS-compatible control interface can enable the AD8306 within about 500ns and disable it to a standby current of under 1mA. The six cascaded amplifier/limiter cells in the main path have a small signal gain of 12.04dB (x4), with a -3dB bandwidth of 850MHz, providing a total gain of 72dB. The programmable output stage provides a further 18dB of gain.