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RF chipset promises highest integration level

Posted: 02 Mar 2007     Print Version  Bookmark and Share

Keywords:Atmel  RF chipset  ATR2820 SiGe transceiver IC  ATR7040 high-gain PA 

Atmel Corp. has announced the availability of a RF chipset combining the ATR2820 SiGe transceiver IC and the ATR7040 high-gain power amplifier (PA), promising the highest integration level for cordless telephone applications in the 5.8GHz frequency band.

The ATR2820 fully-integrated one-chip 5.8GHz transceiver ATR2820 has been designed using Atmel's advanced SiGe BICMOS process and combines low power consumption and high frequency. This device contains a fully-integrated low-IF receiver, VCO, PLL and a transmit output with 3dBm output power. It is extremely flexible and can be programmed via a 3-wire serial bus to integrate with any cordless telephone base band available on the market as well as standard MCUs for gaming and other consumer applications. The ATR2820's high data-rate capability (1.152Mbps) allows the support of up to six handsets, using the standard DECT protocol via the same base station, or more than six game pads with a game controller.

The ATR7040 power amplifier boosts the power to the optimum of 25dBm with a supply voltage of 3.6V. Taking into consideration the lack of an antenna filter and the transmit/receive switch of 2dB, the coverage distance is about 1600 ft (typically, in free space). The output power can be increased by applying a higher supply voltage.

This chipset provides technical performance at the lowest manufacturing cost, two key issues in the consumer electronics market. The extremely low current consumption (the average RF module consumes 26.5mA with one voice link active) allows cordless phone manufacturers to save cost by using smaller capacity batteries. Also, the bill of materials, and thus system costs, are low because very few external components are needed to complete a cordless phone design. This RF chipset is production friendly–no software or mechanical tuning is needed. Simple ISM applications using the ATR2820 as a stand-alone device can be realised on a small 2-layer printed circuit board.

Samples of the ATR2820 in QFN32 (5-by-5mm) and the ATR7040 PA in QFN16 (3-by-3mm) packages are available now with pricing starting at Rs.258.32 ($5.70) for 10,000-piece quantities.

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