SX1232 WIRELESS & SENSING DATASHEET SX1232 - 868 & 915MHz Ultra Low Power High Link Budget Integrated UHF Transceiver VBAT1&2 VR ANA VR DIG RC Pow er Distribution System Oscillator / LNA Single to Mixers Modulators Differential RFI RESET SPI RXTX RSSI AFC GND Division by 2, 4 or 6 DIO0 RFO Tank PA0 DIO1 Inductor DIO2 Loop Frac-N PLL Ramp & VR PA Filter DIO3 Synthesizer Control DIO4 DIO5 XO PA BOOST 32 MHz PA1&2 XTAL GND High Sensitivity: down to -123 dBm at 1.2 kbps GENERAL DESCRIPTION Bullet-proof front end: IIP3 = -12 dBm The SX1232 is a fully integrated ISM band transceiver 80 dB Blocking Immunity optimized for use in the (EN 300 220-1) 868 MHz band in Low RX current of 9.3 mA, 100nA register retention Europe and the (FCC Part 15) 915 MHz band in the US with a minimum of external components. It offers a combination Fully integrated synthesizer with a resolution of 61 Hz of high link budget and low current consumption in all FSK, GFSK, MSK, GMSK and OOK modulations operating modes. The 143 dB link budget is achieved by a low noise CMOS receiver front end and up to +20 dBm of Built-in Bit Synchronizer performing Clock Recovery transmit output power. A pair of internal power amplifiers are Sync Word Recognition provided permitting either fully regulated - for constant RF Preamble detection performance, or direct supply connection - for optimal efficiency. This makes SX1232 ideal for either M2M io-homecontrol features applications powered by alkaline battery chemistries or long 115 dB+ Dynamic Range RSSI battery life metering applications using Lithium battery chemistries. Automatic RF Sense with ultra-fast AFC The Low-IF architecture of the SX1232 sees fast transceiver Packet engine up to 255 bytes with CRC start times and demodulation predicated towards low Built-in temperature sensor and Low Battery indicator modulation index and gaussian filtered spectrally efficient modulation formats. APPLICATIONS ORDERING INFORMATION Automated Meter Reading Part Number Delivery MOQ / Multiple Wireless Sensor Networks SX1232IMLTRT Tape & Reel 3000 pieces Home and Building Automation Wireless Alarm and Security Systems SX1232BIMLTRT Tape & Reel 3000 pieces Industrial Monitoring and Control QFN 24 Package - Operating Range -40 +85C KEY PRODUCT FEATURES QFN28 Package - Operating Range -40 +85C +20 dBm - 100 mW Constant RF output vs. Vsupply Pb-free, Halogen free, RoHS/WEEE compliant product +14 dBm high efficiency PA Programmable bit rate up to 300kbps Rev. 4 - July 2013 Page 1 www.semtech.com 2013 Semtech Corporation Interpolation & Decimation and Filtering & Filtering Demodulator & Bit Modulator Synchronizer Packet Engine & 64 BytesFI FO Control Registers - Shift Registers - SPIIn terfaceSX1232 WIRELESS & SENSING DATASHEET Table of Contents Section Page 1. General Description................................................................................................................................................ 9 1.1. Simplified Block Diagram ................................................................................................................................ 9 1.2. Pin and Marking Diagram .............................................................................................................................. 10 1.3. Pin Description .............................................................................................................................................. 11 2. Electrical Characteristics....................................................................................................................................... 13 2.1. ESD Notice.................................................................................................................................................... 13 2.2. Absolute Maximum Ratings .......................................................................................................................... 13 2.3. Operating Range........................................................................................................................................... 13 2.4. Chip Specification ......................................................................................................................................... 14 2.4.1. Power Consumption ................................................................................................................................. 14 2.4.2. Frequency Synthesis................................................................................................................................ 14 2.4.3. Receiver ................................................................................................................................................... 15 2.4.4. Transmitter ............................................................................................................................................... 16 2.4.5. Digital Specification .................................................................................................................................. 17 3. Chip Description.................................................................................................................................................... 18 3.1. Power Supply Strategy.................................................................................................................................. 19 3.2. Low Battery Detector..................................................................................................................................... 19 3.3. Frequency Synthesis ..................................................................................................................................... 20 3.3.1. Reference Oscillator................................................................................................................................. 20 3.3.2. CLKOUT Output ....................................................................................................................................... 20 3.3.3. PLL Architecture....................................................................................................................................... 20 3.3.4. RC Oscillator ............................................................................................................................................ 22 3.4. Transmitter Description ................................................................................................................................. 23 3.4.1. Architecture Description ........................................................................................................................... 23 3.4.2. Bit Rate Setting ........................................................................................................................................ 23 3.4.3. FSK Modulation........................................................................................................................................ 24 3.4.4. OOK Modulation....................................................................................................................................... 25 3.4.5. Modulation Shaping.................................................................................................................................. 25 3.4.6. RF Power Amplifiers................................................................................................................................. 25 3.4.7. High Power +20dBm Operation .................................................................................................................26 3.4.8. Over Current Protection ............................................................................................................................27 3.5. Receiver Description ..................................................................................................................................... 28 3.5.1. Overview .................................................................................................................................................. 28 3.5.2. Automatic Gain Control - AGC ................................................................................................................. 28 3.5.3. RSSI ......................................................................................................................................................... 29 3.5.4. Channel Filter ........................................................................................................................................... 30 3.5.5. FSK Demodulator..................................................................................................................................... 31 3.5.6. OOK Demodulator.................................................................................................................................... 31 3.5.7. Bit Synchronizer ........................................................................................................................................34 Rev. 4 - July 2013 Page 2 www.semtech.com 2013 Semtech Corporation