Apr 05, 2001 San Jose, Calif. - Analog Devices Inc.'s AD8302, a single-chip device for cellular basestation applications, can detect the gain and phase difference between two independent wireless signals at up to 2.7 GHz simultaneously.
Gain and phase measurement previously required a multichip approach, said RF product manager Phillip Halford. But design engineers can incorporate the AD8302 into their products easily and inexpensively to monitor system performance and diagnose signal purity, he said. Since gain and phase are fundamental to all wireless systems, the part can be used for many applications, including instrumentation and test equipment.
The AD8302 measures the amplitude difference between two input signals over a 60-decibel dynamic range, scaled to provide a 30-millivolt/dB output. The phase-measurement range extends to 180 degrees and provides an output of 10 millivolts/ degrees . The device integrates two wideband logarithmic amplifiers, a wideband linear multiplier/phase detector, a 1.8-volt reference source, and analog scaling and interface circuitry, running on a single 2.7- to 5.5-V supply.
It is priced at $15.50 in quantities of 1,000.
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