Transceiver cuts spread-spectrum power budget

The XETI transceiver from LS Research is a low-cost compact frequency hopping spread spectrum 900MHz transceiver.

The XETI transceiver from LS Research is a low-cost compact frequency hopping spread spectrum 900MHz transceiver.

It features the lowest power operation of any transceiver in receive and standby modes, with 500mW of RF output power and a simple serial interface.

The radio is designed using the low-power Xemics XE1202 transceiver and the TI MSP430 microprocessor to enable a highly versatile, yet inexpensive transceiver platform.

The module will be FCC module certified.

The XETI operates at 3V, and the low power consumption means that it uses 21mA in receive and 5uA in standby mode.

It has 1023 hopping channels with an integral wire antenna and RSSI register for link quality.

Operating in the unlicensed ISM Band at 902-928MHz, the XETI uses frequency hopping spread spectrum with direct FSK modulation.

It can be used for both point-to-point and point-to-multipoint or streaming data, with 65,000 network ID channel capacity.

The I/O datarate is software selectable in the range 4.8 to 115Kbit/s.

The modular firmware facilitates easy customisation.

The modules will sell for less than $100.

The Xemics XE1202 can transmit and receive data from 4.8 to 76.8Kbit/s, RF output power can be programmed up to +15dBm (31.5mW) and the current consumption while in reception mode is 12mA.

The on-chip frequency synthesiser ensures that the chip can handle multichannel as well as frequency hopping spread-spectrum communications.

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