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UHF RF transceiver touts lowest RX current consumption

Posted: 28 Aug 2007     Print Version  Bookmark and Share

Keywords:UHF RF transceiver  ISM bands  digital modulation 

Semtech Corp. has released the SX1211, a UHF RF transceiver, which the company says offers the industry's lowest receiver (RX) current consumption of <3mA?about five times lower than competitive devices?increasing battery life in wireless sensor network applications.

The SX1211 is optimised for asynchronous sensor network designs in the unlicensed industrial, scientific and medical (ISM) frequency bands (868-870MHz and 902-928MHz) where low RX power consumption is critical to battery life. Key applications include security and alarm systems, submetering, industrial monitoring and control, building automation and KONNEX systems.

The SX1211 also features a 64byte FIFO buffer that enables more power efficient batch data transfers between the transceiver and MCU. Transmit power consumption at 10dBm is only 25mA. With support for both frequency-shift keying (FSK) modulation and on-off keying (OOK) modulation, the SX1211 can be used for both new and legacy sensor network designs. The device supports FSK data rates from 1.56 to 100kbit/s and OOK data rates up to 32Kbps. Receiver sensitivity for FSK modulation is -104dBm at 25Kbps and for OOK is -110dBm at 2Kbps.

The SX1211 operates over a supply voltage range of 2.1V to 3.6V. It meets regulatory standards for Europe (ETSI EN 300- 220-1) and North America (FCC parts 15.247 and 15.249) for both digital modulation (DTS) and frequency hopping systems. The SX1211 is supplied in a 5mm x 5mm TQFN32 RoHS-compliant package.

Available now in production quantities, the SX1211 is priced at Rs.72.40 ($1.79) each in 3,000-piece minimum lots.

- Gina Roos

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