Atmel's 2,4-GHz DCT chipset, consisting of the LNA/PA IC T7026 and transceiver IC T2803, is especially designed for cordless phones, while also being used for wireless data applications such as Internet access, wireless headsets, games and home entertainment. This chipset enables an extended distance between the handset of a cordless phone and the base station. According to the manufacturer, current solutions can bridge a distance of usually 300 m, this new chipset can reach up to 600 m.
The T2803's variable data transmit bit rate allows to adjust to any data transmit bit rate in a range of 9,6 to 1,152 Mbps. This results in a superior sensitivity, reflected in the lab-tested sensitivity at 1,152 Mbps of -95 dBm, and at 576 Kbps of about -98 dBm. This enables the base station to support up to 10 handsets (multiple handset function), compared to four handsets of conventional products, that use fixed data transmit rates.
The T7026 provides a power output of 28 dBm and includes a power control system, which can be controlled by the software to reduce the current consumption.
For the transceiver IC T2803, an open-loop modulation architecture has been used since many customers have in-depth experience with this modulation scheme. For cordless phone applications, any DECT baseband controller is suited to operate along with the new chipset. For wireless data applications, a baseband controller, eg, Atmel's AVR microcontroller, can be used.
For more information contact Arrow Altech Distribution, 011 923 9600, Memec SA, 011 897 8600, EBV-Electrolink, 021 421 5350.
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