Semtech 公司的SX1231是低功耗高度集成的UHF收发器,能工作在很宽频率范围,包括433, 868 和915 MHz  M频段.在1.2kbps时的灵敏度优于-120dBm,具有16节FIR通路滤波器,因此有高的选择性.可编程输出功率,从-18dBm到+17dBm,增量1dB. FSK比特别率高达300kbps.主要用在自动读表, 无线传感器网络,家庭和建筑物自动化,无线告警和安全系统以及工业监视和控制.

    SX1231: Low Power Integrated UHF Transceiver The SX1231 is a highly integrated RF transceiver capable of operation over a wide frequency range, including the 433, 868 and 915 MHz license-free ISM (Industry Scientific and Medical) frequency bands. Its highly integrated architecture allows for a minimum of external components whilst maintaining maximum design flexibility. All major RF communication parameters are programmable and most of them can be dynamically set. The SX1231 offers the unique advantage of programmable narrow-band and wide-band communication modes without the need to modify external components. The SX1231 is optimized for low power consumption while offering high RF output power and channelized operation, suitable for both the European (ETSI EN 300-220-1) and the North American (FCC part 15) regulatory standards. TrueRF? technology enables a lowcost external component count (elimination of the SAW filter) whilst still satisfying ETSI and FCC regulations.

    SX1231主要特性:

    High Sensitivity: down to -120 dBm at 1.2 kbps

    High Selectivity: 16-tap FIR Channel Filter

    Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm, 80 dB Blocking Immunity, no Image Frequency response

    Low current: Rx = 16 mA, 100nA register retention

    Programmable Pout: -18 to +17 dBm in 1dB steps

    Constant RF performance over voltage range of chip

    FSK Bit rates up to 300 kb/s

    Fully integrated synthesizer with a resolution of 61 Hz

    FSK, GFSK, MSK, GMSK and OOK modulations

    Built-in Bit Synchronizer performing Clock Recovery

    Incoming Sync Word Recognition

    115 dB+ Dynamic Range RSSI

    Automatic RF Sense with ultra-fast AFC

    Packet engine with CRC, AES-128 encryption and 66-byte FIFO

    Built-in temperature sensor and Low Battery indicator

    SX1231应用:

    Automated Meter Reading

    Wireless Sensor Networks

    Home and Building Automation

    Wireless Alarm and Security Systems

    Industrial Monitoring and Control