Product category:
Communications ICs (Wired)
News Release from: Analog Devices | Subject: AD8362
Edited by the Electronicstalk Editorial
Team on 12 March 2002
Chip keeps an eye on complex comms
waveforms
The AD8362 is the first RF IC designed to measure the complex modulated waveforms common to all next-generation wireless infrastructure equipment.
The AD8362 is the first RF IC designed to measure the complex modulated waveforms common to all next-generation wireless infrastructure equipment The AD8362 performs a precise root-mean-square (RMS) power level measurement, providing the user with an accurately scaled, linear-in-decibels output voltage, critical in maintaining basestation output power efficiency and spectrum signal purity
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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These measurements are particularly challenging for the next generation cellular basestations employing 3G CDMA, W-CDMA and 2.5G Edge.
The AD8362 is the basestation companion part to Analog Devices' award-winning AD8361 TruPwr power detection IC, used extensively in terminal and mobile equipment.
The AD8362 doubles the dynamic range of the AD8361, while offering accurately scaled, linear-in-decibels output, which simplifies its use within wireless infrastructure equipment.
In addition the AD8362 is specified for operation up to 2.7GHz, enabling the part to be used in the emerging MMDS broadband access markets, where higher-order complex modulation schemes such as QAM signals allow for higher-datarate services.
With the ability to measure instantaneously the continuously variable crest factor signals found within CDMA, W-CDMA, 8-PSK, QAM and OFDM signals, the AD8362 targets IS95, CDMA2000, 3GPP, GSM Edge, MMDS and other broadband access equipment.
Applications include cellular basestation transmit power level control, receiver signal strength indication (RSSI), single- and multicarrier power amplifier linearisation/control loops, point to multipoint broadband access, point to point high capacity QAM radio links, cellular repeaters, and RF instrumentation equipment.
The AD8362 offers in excess of 60dB measurement range, from -45 to +15dBm, within a 50ohm system.
The device is internally factory trimmed to provide a 50mV/dB output voltage scaling, error correction and a precision internal bias circuit, which ensures excellent accuracy and temperature stability over the full dynamic range.
The AD8362 operates of a single 5V supply, consumes modest 19mA of quiescent current and fully specified for operation from -45 to +85C.
The AD8362 samples are available today in a 16-lead TSSOP package, priced at $6.25 in 1000-piece quantities.
(This was Electronicstalk's Top Story on 11 March 2002).
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