ST S2-LPQTR

The S2-LP is a high performance ultra-low power RF transceiver, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate in both the license-free ISM and SRD frequency bands at 433, 512, 868 and 920 MHz, but can also be programmed to operate at other additional frequencies in the 413-479 MHz, 452-527 MHz, 826-958 MHz, 904-1055 MHz bands. The S2-LP supports different modulation schemes: 2(G)FSK, 4(G)FSK, OOK and ASK. The air data rate is programmable from 0.1 to 500 kbps. The S2-LP can be used in systems with channel spacing down to 1 kHz enabling the narrow band operations. The S2-LP shows an RF link budget higher than 140 dB for long communication ranges and meets the regulatory requirements applicable in territories worldwide, including Europe, Japan, China and the USA.

• Frequency bands: 413-479 MHz (S2-LPQTR) 452-527 MHz (S2-LPCBQTR) 826-958 MHz (S2-LPQTR) 904-1055 MHz (S2-LPCBQTR)
• Modulation schemes: 2(G)FSK, 4(G)FSK OOK, ASK
• Air data rate from 0.1 to 500 kbps
• Ultra-low power consumption: 7 mA RX 10 mA TX @ +10 dBm
• Excellent performance of receiver sensitivity: down to -130 dBm
• Excellent receiver selectivity and blocking
• Programmable RF output power up to +16 dBm
• Programmable RX digital filter
• Programmable channel spacing
• Fast start-up and frequency synthesizer settling time
• Automatic frequency offset compensation, AGC and symbol timing recovery
• More than 145 dB RF link budget
• Battery indicator and low battery detector
• RX and TX 128 bytes FIFO buffers
• 4-wire SPI interface
• Automatic packet acknowledgment and retransmission
• Embedded timeout protocol engine
• Excellent receiver selectivity (>80 dB @ 2 MHz)
• ST companion integrated balun/filter chips are available
• Antenna diversity algorithm
• Fully integrated ultra-low power RC oscillator
• Wake-up driven by internal timer or external event
• Digital real time RSSI
• Flexible packet length with dynamic payload length
• Programmable preamble and SYNC word quality filtering and detection
• Embedded CSMA/CA engine based on listen-before-talk systems
• IEEE 802.15.4g hardware packet support with whitening, FEC, CRC and dual SYNC word detection
• Wireless M-BUS supported
• KNX-RF supported
• Enables operations in the SIGFOX and MONARCH networks
• Suitable to build systems targeting: Europe: ETSI EN 300 220, category 1.5 natively compliant, ETSI EN 303 131; US: FCC part 15 and part 90; Japan: ARIB STD T67, T108; China: SRRC
• Operating temperature range: -40 °C to +105 °C

• Sensors to Cloud
• Smart metering
• Home energy management systems
• Wireless alarm systems
• Smart home
• Building automation
• Industrial monitoring and control
• Smart lighting systems