Telecoms, Datacoms, Wireless, IoT


Full duplex RF transceivers for growing 'passive-entry-go' market

2 November 2005 Telecoms, Datacoms, Wireless, IoT

Atmel has introduced two new full duplex RF transceiver ICs optimised for automotive keyless entry/ passive entry go (PEG) and tyre pressure monitoring (TPMS) systems. The ATA5824 and ATA5823 can also be used for remote control, alarm, telemetering, energy metering and home automation systems etc. The ATA5823 is designed for 313 to 316 MHz, whereas the ATA5824 operates at 433 to 435 MHz and 867 to 870 MHz. Both transceivers are pin- and functionally identical. They support data rates of 1 kBaud to 20 kBaud (FSK) and 1 kBaud to 10 kBaud (ASK) in Manchester, Bi-phase or other codes in transparent mode. Their current consumption is both in receive and in transmit mode as low as 10,5 mA (3 V/Tx with 5 dBm). The new transceivers' system performance demonstrates: high sensitivity in ASK (eg -116,5 dBm at 2,4 kBaud) and FSK mode (eg -109,5 dBm at 2,4 kBaud); a PAE of nearly 40%; adjustable output power of up to +10 dBm for long-distance operation; a high selectivity; and a high blocking plus low intermodulation due to the receiver module's low-IF architecture. The ATA5823/4 full-duplex RF transceivers come in small QFN48 package.



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