SX1257IWLTRT Semtech

SX1257 Low Power Digital I and Q RF Multi-PHY Mode Transceiver VBAT VR ANA1 VR ANA2 VR DIG Power Distribution System 0 to -30 dB with 2 dB steps RESET 0 to -48 dB with 6 dB steps 1 b RX pre-filter CT I OUT RF IN 1 b RX pre-filter CT Q OUT MISO Div by 2 MOSI Fractional-N SCK Frequency Synthesizer NSS ATT CLKIN Div by 2 Fractional-N CLKOUT Frequency Synthesizer 1 b TX Filter DAC I IN RF OP Driver RF ON 1 b TX Filter DAC Q IN XO 36 MHz XTA XTB Figure A: SX1257 Block Diagram General Description Applications The SX1257 is a highly integrated RF front-end to digital I IEEE 802.15.4g SUN Multi-PHY Mode Smartgrid and Q modulator/demodulator Multi-PHY mode Cognitive / Software Defined Radio (SDR) transceiver capable of supporting multiple constant and non-constant envelope modulation schemes. It is designed Key Product Features to operate over the 862 to 960 MHz European, North Fully flexible I and Q modulator and demodulator American and Japanese ISM (Industrial, Scientific and Medical) license-exempt frequency bands. Its highly Half or full-duplex operation integrated architecture allows for a minimum of external Bullet proof RX LNA components whilst maintaining maximum design Analog TX and RX pre-filtering flexibility. All major RF communication parameters are Programmable tap TX FIR-DAC filter programmable and most of them can be dynamically set. Linear TX amplifier for both constant and non-constant The SX1257 offers support for both narrow-band and envelope modulation schemes wide-band communication modes without the need to modify external components. The SX1257 is optimized for low power consumption while offering the provision for high RF output power and channelized operation. TrueRF technology enables a low-cost external component count whilst still satisfying ETSI, FCC and ARIB regulations. SX1257 1 of 42 www.semtech.com Data Sheet Rev. 1.1 Semtech DS.SX1257.W.APP February 2018 Single to Diff Control Registers and InterfaceOrdering Information Part Number Delivery Minimum Order Quantity SX1257IWLTRT MLPQW-32 3000 pieces Pb-free, Halogen free, RoHS/WEEE compliant product. Document Revision History Version ECO Date Modifications 1.0 005895 February 2012 First Final datasheet revision Migration to new data sheet template 1.1 040837 February 2018 Correction of Data Hold and Set-Up Time Correction of minor typographical errors SX1257 2 of 42 www.semtech.com Data Sheet Rev. 1.1 Semtech DS.SX1257.W.APP February 2018