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ADI detector IC measures next-gen wireless waveforms

Posted: 11 Apr 2002 ?? ?Print Version ?Bookmark and Share

Keywords:ad8362? ad8361? trupwr? rf ic? rms detector ic?

The AD3862 RMS detector IC from Analog Devices Inc. has the ability to measure instantaneously the continuously-variable crest factor signals found within CDMA, W-CDMA, 8-PSK, QAM and OFDM signals. This makes the device suitable for integration into IS95, CDMA2000, 3GPP, GSM EDGE, MMDS, and other broadband access equipment.

The RF IC performs rms power level measurement, providing users with a scaled linear-in-dB output voltage, required in maintaining base station output power efficiency and spectrum signal purity.

A member of the TruPwr line, the AD8362 offers >60dB measurement range from -45dBm to 15dBm, within 50-ohm systems. The device is internally factory-trimmed to provide a 50mV/dB output voltage scaling, error correction, and a precision internal bias circuit, which ensures accuracy and temperature stability over the full dynamic range.

The device is the basestation companion part to the company's AD8361 TruPwr power detection IC, used in terminal and mobile equipment. The AD8362 doubles the dynamic range of the AD8361, while offering accurately-scaled, linear-in-dB output to simplify its use within wireless infrastructure equipment.

"Before we introduced the first TruPwr RF IC, designers were forced to use inaccurate methods with severe performance limitations. These customers found the part suited for small, low power terminal equipment," said Jay Cormier, product line director for RF ICs at ADI.

The 16-lead TSSOP device is specified for operation up to 2.7GHz and operates from a single 5V supply, while consuming 19mA of quiescent current. It functions at a temperature range of -45C to 85C.

The AD8362 is priced at $6.25 in 1,000-piece quantities.

Analog Devices Inc. is an exhibitor at the 7th annual International IC ? China Conference and Exhibition (IIC-China), which is co-located with the 2nd Embedded Systems Conferences ? China (ESC-China). Organized by eMedia Asia Ltd, a Global Sources and CMP Media joint venture, IIC-China and ESC-China kicked off April 8 in Shanghai. The shows will close their Beijing leg today April 11, and will move to Shenzhen for the third installment of the series from April 15 to 16.

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