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Power detector/controller combines low power, small packaging

Posted: 25 Aug 2005     Print Version  Bookmark and Share

Keywords:ad8319  analog devices  adi  power detector/controller 

Analog Devices claims that its latest power detector/controller accurately measures RF signals over the industry's widest frequency range of 1MHz to 10GHz, and delivers an exceptional 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. This device supports all cellular standards (GSM, CDMA, W-CDMA and TD-SCDMA), broadband wireless standards (WiFi, WiMAX and WiBro), and proprietary systems that operate in a variety of frequency bands.

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 ±1dB over a dynamic range of 40dB. This product can also be used as a power controller when its outputs are used to adjust a power amplifier or a VGA (variable-gain amplifier). For radar applications, it has an output response time of 8ns, enabling RF burst detection to beyond 125MHz.

Low power, small size

The AD8319 operates over a supply voltage range of 3V to 5.5V, consuming 20mA. ADI added that power consumption is reduced to <1mW when the device is disabled. Its low-power consumption and miniature single-chip 2-by-3mm package makes the device suitable for portable communications applications.

Already available for sampling, the AD8319 is priced at $2.99 per unit in 1,000-piece quantities and is packaged in a 2-by-3mm, 8-lead LFCSP. Volume production is scheduled in November 2005.

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