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STMicroelectronics STS1TX Low-Power RF Transmitter

STMicroelectronics STS1TX Low-Power RF Transmitter is intended for RF wireless applications in the sub-1GHz band. The STS1TX is designed to operate both in the license-free ISM (industrial, scientific, and medical) and SRD (short range device)  frequency bands at 169MHz, 315MHz, 433MHz, 868MHz, and 915MHz, but can also be programmed to operate at other frequencies in the 300MHz to 348MHz, 387MHz to 470MHz, and 779MHz to 956MHz bands. The air data rate is programmable from 1 to 500kbps, and the STS1TX can be used in systems with channel spacing of 12.5/25kHz, complying with the EN 300 220 standard. 

The STMicroelectronics STS1TX uses very few discrete external components and integrates a configurable baseband modem, which supports data management and modulation. The data management handles the data in the proprietary fully-programmable packet format, and also allows the M-Bus standard compliance format (all performance classes). An AES 128-bit encryption co-processor is available for secure data transfer. The STS1TX supports different modulation schemes: 2-FSK, GFSK, OOK, ASK, and MSK. Transmitted data bytes are buffered in FIFO (TX FIFO), accessible via the SPI interface for host processing.

Features

  • Frequency bands: 150MHz to 174MHz, 300MHz to 348MHz, 387MHz to 470MHz, 779MHz to 956MHz
  • Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK
  • Air data rate from 1kbps to 500kbps
  • Very low power consumption (21mA TX at +11dBm)
  • Programmable channel spacing (12.5kHz min.)
  • Programmable output power up to +16dBm
  • Fast startup and frequency synthesizer settling time (6μs)
  • Integrated temperature sensor
  • Battery indicator and low battery detector
  • TX FIFO buffer (96bytes each)
  • Configurability via SPI interface
  • AES 128-bit encryption co-processor
  • Fully integrated ultra low-power RC oscillator
  • Wakeup on internal timer and on external event
  • Flexible packet length with dynamic payload length
  • Automatic CRC handling
  • FEC with interleaving
  • Whitening of data
  • Wireless M-BUS, EN 300 220, FCC CFR47 15 (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant
  • -40°C to +85°C operating temperature range
  • 4mm x 4mm QFN20 package
  • RoHS compliant

Applications

  • AMR (automatic meter reading)
  • Home and building automation
  • WSN (wireless sensors network)
  • Industrial monitoring and control
  • Wireless fire and security alarm systems
  • Point-to-point wireless link

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Block Diagram

STMicroelectronics STS1TX Low-Power RF Transmitter
Opublikowano: 2014-03-14 | Zaktualizowano: 2022-03-11