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UHF transceiver, receiver up radio operating cycle

Posted: 11 Aug 2009 ?? ?Print Version ?Bookmark and Share

Keywords:UHF? transceiver? receiver?

Semtech Corp. has added the SX1212 UHF transceiver and SX1213 UHF receiver to its RF product line, which is claimed to offer the lowest receive current consumption.

The SX1212 is a single-chip transceiver that operates in the 300MHz to 510MHz frequency range with a receive current of 2.5mA (typ.). The SX1213 is a single-chip receiver for the same frequency range and with the same low receive current level. Both devices are designed for wireless alarm, security, sensors network in home automation and automated meter reading applications.

The receive current of the SX1212 and SX1213 is five to six times better than competing devices. As a result, customers can increase the operating cycle of the radios in their designs, which reduces latency and improves response time, the company said.

The SX1212 and SX1213 are fully regulated to deliver a consistent RF range as the battery voltage decreases over time. This eliminates the cost and board space needed for external power management. For outdoor applications in extreme conditions, both devices deliver stable RF performance across a -40C to +85C temperature range.

Both devices incorporate a baseband modem with data rates up to 200Kbit/s. Data handling features include a 64byte FIFO, packet handling, automatic CRC generation and data whitening. All major RF communication parameters are programmable and most of them may be dynamically set. Both devices comply with European (ETSI EN 300-220 V2.1.1) and North American (FCC part 15.247 and 15.249) regulatory standards.

With support for both frequency-shift keying (FSK) modulation and on-off keying (OOK) modulation, the SX1212 and SX1213 can be used in new and legacy sensor network designs. The devices support FSK data rates from 1.56Kbit/s to 200Kbit/s and OOK data rates up to 32Kbit/s. Receiver sensitivity for FSK modulation is -104dBm at 25Kbit/s and for OOK is -110dBm at 2Kbit/s.

The SX1212 (order code: SX1212IWLTRT) and SX1213 (order code: SX1213IWLTRT) are available immediately in production quantities for $1.89 each in 3,000-piece lots.

- Ismini Scouras

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