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Atmel rolls out RF chipset for cordless phones

Posted: 06 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:transceiver? power amplifier? BICMOS? Atmel? RF chipset?

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

Advanced SiGe BICMOS
The ATR2820 fully integrated, one-chip 5.8GHz transceiver has been designed using the company'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 flexible and can be programmed via a 3-wire serial bus to integrate with any cordless telephone baseband available on the market as well as standard MCUs for gaming and other consumer applications. The ATR2820's data-rate capability of 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 1600ft (typically, in free space). The output power can be increased by applying a higher supply voltage.

'Lowest' manufacturing cost
This chipset provides technical performance at the lowest manufacturing cost, two key issues in the CE market. The 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 BOM, and thus system cost, are low because few external components are needed to complete a cordless phone design. This RF chipset is production friendlyno software or mechanical tuning is needed. Simple ISM applications using the ATR2820 as a standalone device can be realized on a small two-layer PCB.

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

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