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Transceiver radio enables two-way wireless comms

Posted: 28 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:transceiver radio? RFIC? wireless communications?

TRC105 transceiver radio

RF Monolithics Inc. has expanded its low-power short-range radio RFIC line with the addition of the new 300MHz to 510MHz TRC105 transceiver radio.

The TRC105 is designed for enabling two-way wireless communications in a wide range of applications. Applications include automated meter reading), medical, home and industrial automation, security systems, two-way remote keyless entry, automobile immobilizers, asset tracking systems, sports and recreation equipment, low-power two-way telemetry systems and wireless toys.

According to Larry Miller, RFM director of product marketing for short-range radio products, the device is FHSS capable, multi-channel and are packaged in a 5mm x 5mm plastic package.

The TRC105 operates across the full 300-510MHz range and development kits are available in eight frequency bands: 303-307MHz, 310-319MHz, 342-348MHz, 365-381MHz, 382-398MHz, 402-407MHz, 416-436MHz and 447-451MHz, whereas the TRC103 is available in three frequency bands: 863-870MHz (ETSI), 902-928MHz (FCC), and 950-960MHz (Japan).

Miller added that because many applications require the radio to listen more than transmit, the TRC105's receiver current is 3.5mA typical and can be reduced as low as 2.7mA and has a receiver sensitivity at -112dBm typical (FSK).

The device is programmable with transmit power up to +13dBm and allows a companion microcontroller to sleep until data is received that requires processing. Transmit/Receive FIFO can be loaded/unloaded with radio in sleep mode, programmable TX/RX FIFO at 64byte.

In addition, it transmits at 32Kbit/s OOK and 200Kbit/s FSK to reduce transmitter on time and save power and using the RSSI in Receive mode, the transmit power can be adjusted to maintain the data link and maximize power consumption.

The device pricing starts at $2.23 each at a minimum quantity of 3,000 units. Volume discounts are available. The TRC105 product line includes developer kits that are available for the major frequency ranges. The TRC105 developer kits are priced at $280 each and will be available by the end of October.

- Bernard Cole

For application notes on transceivers click here.

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