PARIS Analog and mixed-signal semiconductor vendor Semtech Corp. said it has introduced the SX1257, a low power digital I/Q RF multi-mode PHY transceiver. Suitable for smart metering applications, the SX1257 supports mandatory and optional 802.15.4g PHY modes, including orthogonal frequency division multiplexing.
Semtech claimed that its SX1257 single-chip Zero-IF RF-to-digital front-end transceiver is designed for today's high performance multi-PHY mode or SDR ISM band RF applications. The SX1257 has a maximum signal bandwidth of 500 kHz in both transmission and reception. It is intended as a high performance, low-cost RF-to-digital converter and provides a generic RF front-end that allows several constant and non-constant envelope modulation schemes to be handled, such as the MR-FSK, MR-OFDM and MR-O-QPSK PHYs of the IEEE 802.15.4g standard for Smart Utility Networks (SUN) and Smartgrid applications in the 862 - 960 MHz license-exempt frequency bands, the company said.
The SX1257 can operate in both half and full-duplex mode and is compliant with ETSI, FCC and ARIB regulatory requirements. It is available in a MLPQ-W 5 x 5 mm 32 lead package.
Fully flexible I and Q modulator and demodulator
Half or full-duplex operation
Bullet-proof RX LNA
Analog TX and RX pre-filtering
Programmable tap TX FIR-DAC filter
Linear TX amplifier for both constant and non-constant envelope modulation schemes
. IEEE 802.15.4g SUN Multi-PHY Mode Smartgrid
. Cognitive / Software Defined Radio (SDR)
Pricing and availability
Click on image to enlarge the block diagram.
The SX1257 (order code: SX1257IWLTRT) is available immediately in production quantities. It is priced at $1.80 each in 10,000 piece lots.------------------------
If you found this article to be of interest, visit SmartEnergy Designline
where you will find the latest and greatest design, technology,
product, and news articles with regard to all aspects of clean
technologies. And, to register to our weekly newsletter, click here.