SX1255-55SKA433 Semtech

mux SX1255 Low Power Digital I and Q RF Multi-PHY Mode Transceiver VBAT1 VBAT2 VR ANA1 VR ANA2 VR DIG 0 to 30dB with 2dB steps 0 to 48dB with 6dB steps CT Rx prefilter Power Distribution System 1b RFIN Rx prefilter CT I RX 1b RX I OUT PLL DIV 4 2 N 32 Q OUT 2 Fractional frequency Q RX 32 Digital Bridge I2S synthesizer I IN N 32 2 TX 32 Q IN PLL 2 ATT DIV 4 Fractional frequency Gain DAC DIO(2) 5b synthesizer 1b DIO(3) RFOUT P Tx Filter FIRDAC I TX DIO(1) Driver 1b Tx Filter FIRDAC RFOUT M Q TX DIO(0) balun Registers and interface XOSC CLK select XTA XTB CLK IN CLK OUT NSS MOSI MISO SCK RESET Figure A: SX1255 Block Diagram General DescripSX1255tion Applications The SX1255 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 400 to 510 MHz worldwide licensed and Fully flexible I and Q modulator and demodulator unlicensed frequency bands. Its highly integrated architecture allows for a minimum of external components Half or full-duplex operation whilst maintaining maximum design flexibility. All major RF Bullet proof RX LNA communication parameters are programmable and most Analog TX and RX pre-filtering of them can be dynamically set. The SX1255 offers support 2 Decimated I&Q signal under I S industry format for both narrow-band and wide-band communication modes without the need to modify external components. Programmable tap TX FIR-DAC filter The SX1255 is optimized for low power consumption while Linear TX amplifier for both constant and non-constant offering the provision for high RF output power and envelope modulation schemes channelized operation. TrueRF technology enables a low-cost external component count whilst still satisfying ETSI, FCC, ARIB and other regulations. SX1255 1 of 49 www.semtech.com Data Sheet Rev. 3.1 Semtech DS.SX1255.W.APP March 2018 Single to diff muxSX1255Ordering Information Part Number Delivery Minimum Order Quantity SX1255IWLTRT MLPQW-32 3000 pieces SX1255WS - 1 wafer Pb-free, Halogen free, RoHS/WEEE compliant product. Document Revision History Version ECO Date Modifications 1.0 011527 February 2013 First datasheet revision 2.0 013161 May 2013 Updated specifications after part characterization 3.0 015891 October 2013 Add wafer sale part number Migration to the new data sheet template 3.1 041328 March 2018 Correction of NSS Hold Time to 50 ns Correction of minor typographical errors SX1255 2 of 49 www.semtech.com Data Sheet Rev. 3.1 Semtech DS.SX1255.W.APP March 2018