Overview
The STS1TXQTR is a very low-power RF transmitter designed by STMicroelectronics for RF wireless applications in the sub-1 GHz band. It is intended to operate in both license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, and can also be programmed to operate at other frequencies within the 300-348, 387-470, and 779-956 MHz bands. This transmitter is optimized for low power consumption and high efficiency, making it suitable for a variety of wireless applications.
Key Specifications
| Parameter | Value |
|---|---|
| Frequency Bands | 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz |
| Modulation Schemes | 2-FSK, GFSK, MSK, GMSK, OOK, ASK |
| Air Data Rate | 1 to 500 kbps |
| Power Consumption | 21 mA TX at +11 dBm |
| Channel Spacing | Programmable, minimum 12.5 kHz |
| Output Power | Programmable up to +16 dBm |
| Startup and Synthesizer Settling Time | 6 μs |
| Operating Temperature Range | -40 °C to 85 °C |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Package Type | VFQFPN 20 4x4x1.0 mm, RoHS compliant (Ecopack3) |
Key Features
- Integrated temperature sensor and battery indicator with low battery detector
- TX FIFO buffer (96 bytes each)
- Configurability via SPI interface
- AES 128-bit encryption co-processor for secure data transfer
- 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 and FEC with interleaving
- Whitening of data
- Compliance with Wireless M-BUS, EN 300 220, FCC CFR47 15, and ARIB STD T-67, T93, T-108
Applications
- Automatic Meter Reading (AMR)
- Home and Building Automation
- Wireless Sensor Networks (WSN)
- Industrial Monitoring and Control
- Wireless Fire and Security Alarm Systems
- Point-to-Point Wireless Links
Q & A
- What are the frequency bands supported by the STS1TXQTR? The STS1TXQTR supports frequency bands from 150-174 MHz, 300-348 MHz, 387-470 MHz, and 779-956 MHz, as well as specific ISM and SRD frequencies like 169, 315, 433, 868, and 915 MHz.
- What modulation schemes are available on the STS1TXQTR? The STS1TXQTR supports modulation schemes including 2-FSK, GFSK, MSK, GMSK, OOK, and ASK.
- What is the air data rate range of the STS1TXQTR? The air data rate is programmable from 1 to 500 kbps.
- How much power does the STS1TXQTR consume during transmission? The STS1TXQTR consumes 21 mA at +11 dBm during transmission.
- What is the minimum channel spacing for the STS1TXQTR? The minimum channel spacing is 12.5 kHz, and it is programmable.
- What is the maximum output power of the STS1TXQTR? The output power is programmable up to +16 dBm.
- How long does it take for the STS1TXQTR to start up and settle its frequency synthesizer? The startup and frequency synthesizer settling time is 6 μs.
- Does the STS1TXQTR have any integrated sensors? Yes, it has an integrated temperature sensor and a battery indicator with a low battery detector.
- What type of encryption does the STS1TXQTR support? The STS1TXQTR supports AES 128-bit encryption.
- What are the operating temperature and voltage ranges for the STS1TXQTR? The operating temperature range is -40 °C to 85 °C, and the operating voltage range is 1.8 V to 3.6 V.
- What are some common applications of the STS1TXQTR? Common applications include AMR, home and building automation, WSN, industrial monitoring and control, wireless fire and security alarm systems, and point-to-point wireless links.
