STMicroelectronics: STS1TX Low data rate, low power sub-1GHz transmitter

WilliamSouplet — Tue, 07 Jan 2014 14:12:59 GMT

Current Revision posted to Documents by WilliamSouplet on 1/7/2014 2:12:59 PM

The STS1TX is a very low-power RF transmitter intended for RF wireless applications in the sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, but can also be programmed to operate at other frequencies in the 300-348, 387-470, and 779-956 MHz bands.

The air data rate is programmable from 1 to 500 kbps, and the STS1TX can be used in systems with channel spacing of 12.5/25 kHz, complying with the EN 300 220 standard. It 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: 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz
Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK
Air data rate from 1 to 500 kbps
Very low power consumption (21 mA TX at +11 dBm)
Programmable channel spacing (12.5 kHz min.)
Programmable output power up to +16 dBm
Fast startup and frequency synthesizer settling time (6 ìs)
Integrated temperature sensor
Battery indicator and low battery detector
TX FIFO buffer (96 bytes 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
QFN20 4x4 mm RoHS package
Operating temperature range from -40 °C to 85 °C

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

Tags: band, security, building, sub, network, transmitter, ghz, wireless, rf, alarm, sts1tx, home, automation