SX1231 Datasheet, PDF (1/78 Pages) Semtech Corporation – Low Power Integrated UHF Transceiver

SX1231
ADVANCED COMMUNICATIONS & SENSING
SX1231 Transceiver
Low Power Integrated UHF Transceiver
DATASHEET
RFIO
VBAT1&2
VR_ANA
VR_DIG
Power Distribution System
LNA
Σ/Δ
Single to
Mixers
Modulators
Differential
RC
Oscillator
GND
VR_PA
PA0
Ramp &
Control
PA_BOOST
PA1&2
Tank
Inductor
Loop
Filter
Division by
2, 4 or 6
Frac-N PLL
Synthesizer
XO
32 MHz
XTAL
RSSI
AFC
GND
RESET
SPI
RXTX
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
GENERAL DESCRIPTION
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.
APPLICATIONS
Š Automated Meter Reading
Š Wireless Sensor Networks
Š Home and Building Automation
Š Wireless Alarm and Security Systems
Š Industrial Monitoring and Control
KEY PRODUCT FEATURES
Š High Sensitivity: down to -120 dBm at 1.2 kbps
Š High Selectivity: 16-tap FIR Channel Filter
Š Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,
80 dB Blocking Immunity, no Image Frequency response
Š Low current: Rx = 16 mA, 100nA register retention
Š Programmable Pout: -18 to +17 dBm in 1dB steps
Š Constant RF performance over voltage range of chip
Š FSK Bit rates up to 300 kb/s
Š Fully integrated synthesizer with a resolution of 61 Hz
Š FSK, GFSK, MSK, GMSK and OOK modulations
Š Built-in Bit Synchronizer performing Clock Recovery
Š Incoming Sync Word Recognition
Š 115 dB+ Dynamic Range RSSI
Š Automatic RF Sense with ultra-fast AFC
Š Packet engine with CRC, AES-128 encryption and 66-
byte FIFO
Š Built-in temperature sensor and Low Battery indicator
ORDERING INFORMATION
Part Number
SX1231IMLTRT
Delivery
Tape & Reel
MOQ / Multiple
3000 pieces
Š QFN 24 Package - Operating Range [-40;+85°C]
Š Pb-free, Halogen free, RoHS/WEEE compliant product
Rev 2 - Nov 2009
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