AD608ARZ-RL

AD608ARZ-RL is a low-power mixer/limiter/RSSI 3V receiver IF subsystem. It provides a low power, low distortion, low noise mixer as well as a complete, monolithic logarithmic/limiting amplifier that uses a successive-detection technique. In addition, the AD608 provides both a high-speed received signal strength indicator (RSSI) output with 80dB dynamic range and a hard-limited output. The RSSI output is from a two-pole post demodulation low-pass filter and provides a loadable output voltage of 0.2V to 1.8V. The AD608 operates from a single 2.7V to 5.5V supply at a typical power level of 21mW at 3V. The RF and local oscillator (LO) bandwidths both exceed 500MHz. In a typical IF application, the AD608 can accept the output of a 240MHz surface acoustic wave (SAW) filter and down convert it to a nominal 10.7MHz IF with a conversion gain of 24dB (ZIF = 165 ohm). Applications include PHS, GSM, TDMA, FM, or PM receivers, battery-powered instrumentation, base station RSSI measurements.

• RF and LO frequency range is 500MHz typical at (TA = 25°C)
• 1dB compression point is -15dBm typical at (input terminated in 50 ohm, TA = 25°C)
• Conversion gain is 24dB typical at (driving doubly terminated 330 ohm IF filter, ZIF = 165 ohm)
• Powered up current is 7.3mA typical at (VPOS = 3V, TA = 25°C)
• Power-up response time is 200ns typical at (active limiter output, TA = 25°C)
• Input capacitance is 3pF typical at (fRF = 100MHz, TA = 25°C)
• Third-order intercept is -5dBm typical at (fRF = 240MHz and 240.02MHz, fLO = 229.3MHz)
• Noise figure is 11dB typical at (matched input, fRF = 100MHz, TA = 25°C)
• Rise and fall times is 11ns typical at (driving a 5pF load, TA = 25°C)
• Temperature range from -40°C to +85°C, 16-lead SOIC-N package

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