The AD8319, the latest addition to Analog Devices' family of power detectors/controllers, accurately measures RF signals over a wide frequency range of 1 MHz to 10 GHz. The device delivers a combination of low power, small packaging and fast output response time. Offered at the lowest price point in the AD831x family, the AD8319 allows wireless designers to trade off dynamic range for system cost. The device supports all cellular standards (GSM, CDMA, W-CDMA and TD-SCDMA), broadband wireless standards (WiFi, WiMAX, WiBro), and proprietary systems that operate in a variety of frequency bands.

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A demodulating log amp, the AD8319 provides precise, temperature-stable performance over the full range of -40°C to +85°C and offers accurate RF measurement of better than ±1 dB over a dynamic range of 40 dB. The device can also be used as a power controller when its outputs are used to adjust a power amplifier or a variable-gain amplifier (VGA), such as ADI's ADL5330. For radar applications, the device has an output response time of eight nanoseconds, enabling RF burst detection to beyond 125 MHz. It operates over a supply voltage range of 3 V to 5.5 V, consuming only 20 mA; power consumption is reduced to less than 1 mW when the device is disabled. Its low-power consumption and miniature single-chip 2 mm x 3 mm package makes the device suited for portable communications applications.

It is sampling now with volume production scheduled for November 2005. It is priced at $2.99 per unit in 1000-piece quantities and is packaged in a space-saving 2 mm x 3 mm, 8-lead LFCSP.