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SX1238 Dataheets PDF



Part Number SX1238
Manufacturers Semtech
Logo Semtech
Description Fully Integrated Transceiver
Datasheet SX1238 DatasheetSX1238 Datasheet (PDF)

WIRELESS, SENSING & TIMING SX1238 - Fully Integrated Transceiver with +27dBm TX Power SX1238 DATASHEET VDD2 RXEN MODE RX RFI PREAMP VBAT1&2 VR_ANA VR_DIG LNA Power Distribution System Single to Differential Mixers RC Oscillator Decimation & Filtering Demodulator & Bit Synchronizer ANT IND PA PA0 Ramp & Control VDD1 PAout PDET TXEN TX RFO VR_PA Preamp/PA Tank Inductor Loop Filter Division by 2,4, or 6 Frac-N PLL Synthesizer XO 32 MHz Interpolation & Filltering Modulator RSSI AFC.

  SX1238   SX1238


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WIRELESS, SENSING & TIMING SX1238 - Fully Integrated Transceiver with +27dBm TX Power SX1238 DATASHEET VDD2 RXEN MODE RX RFI PREAMP VBAT1&2 VR_ANA VR_DIG LNA Power Distribution System Single to Differential Mixers RC Oscillator Decimation & Filtering Demodulator & Bit Synchronizer ANT IND PA PA0 Ramp & Control VDD1 PAout PDET TXEN TX RFO VR_PA Preamp/PA Tank Inductor Loop Filter Division by 2,4, or 6 Frac-N PLL Synthesizer XO 32 MHz Interpolation & Filltering Modulator RSSI AFC XTAL GND Frequency Synthesis Transmitter Blocks Receive Blocks Control Blocks Primary Analog Primary Digital Packet Engine & 66 byte FIFO Control Registers - Shift Registers - SPI Interface RESET SPI RXTX DIO0 DIO1 DIO2 DIO3 DIO4 DIO5 GENERAL DESCRIPTION The SX1238 is a fully integrated ISM band transceiver optimized for use in the (FCC Part 15) 915 MHz band in the US and 868 MHz band in Europe with a minimum of external components. It offers a combination of high link budget and low current consumption in all operating modes. The 150 dB link budget is achieved by a low noise CMOS receiver front end and up to +27 dBm of transmit output power. This is made possible by a fully integrated front end consisting of a TR Switch, LNA and efficient PA. This makes SX1238 ideal for applications requiring extended range, high link budget, or operation in the presence of high interference. The Low-IF architecture of the SX1238 sees fast transceiver start times and demodulation predicated towards low modulation index and Gaussian filtered spectrally efficient modulation formats. APPLICATIONS  Automated Meter Reading  Wireless Sensor Networks  Home and Building Automation  Wireless Alarm and Security Systems  Industrial Monitoring and Control KEY PRODUCT FEATURES  +27 dBm - 500 mW RF output power  +27 dBm high efficiency PA  Programmable bit rate up to 300kbps  High sensitivity: -124 dBm at 1.2 kbps  863 - 870 MHz and 902 - 928 MHz  80 dB blocking Immunity  Low current, 100nA register retention  Fully integrated synthesizer with a resolution of 61 Hz  FSK, GFSK, MSK, GMSK and OOK modulations  Built-in bit synchronizer performing clock recovery  Sync word recognition  Preamble detection  115 dB+ dynamic range RSSI  Automatic RF sense with ultra-fast AFC  Packet engine up to 64 bytes with CRC  Built-in temperature sensor and low battery indicator ORDERING INFORMATION Part Number SX1238IMLTRT Delivery Tape & Reel MOQ / Multiple 3000 pieces  MLPQ 40 Package - Operating Range [-40;+85°C]  Pb-free, Halogen free, RoHS/WEEE compliant product SX1238 Rev.2, June 2014 ©2014 Semtech Corp. Page 1 www.semtech.com SX1238 High Power Transceiver IC WIRELESS, SENSING & TIMING Table of contents DATASHEET Section Page 1. General Description ................................................................................................................................................ 6 1.1. Simplified Block Diagram ................................................................................................................................ 6 1.2. Pin and Marking Diagram .................................................................................................................................7 1.3. Pin Description .................................................................................................................................................8 2. Electrical Characteristics....................................................................................................................................... 10 2.1. ESD Notice.................................................................................................................................................... 10 2.2. Absolute Maximum Ratings .......................................................................................................................... 10 2.3. Operating Range........................................................................................................................................... 10 2.4. Chip Specification ...........................................................................................................................................11 2.4.1. Power Consumption............................................................................................................................... 11 2.4.2. Frequency Synthesis.............................................................................................................................. 11 2.4.3. Receiver ................................................................................................................................................. 12 2.4.4. Transmitter ............................................................................................................................................. 13 2.4.5. Front End Control.......................................................................................


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