S2-LP  

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 MH, 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.

Key Features

• 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
• 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