Overview
The S2-LPQTR is an ultra-low-power, high-performance sub-GHz transceiver designed for long-range RF communication in license-free ISM bands. Supporting frequencies from 413 MHz to 479 MHz, 826 MHz to 958 MHz, and 169 MHz, the device provides excellent sensitivity down to –130 dBm, programmable output power up to +16 dBm, and extremely low current consumption, enabling multi-year battery-powered wireless applications. Its flexible modulation support, high performance in noisy RF environments, and integrated packet engine make it suitable for IoT, smart metering, building automation, and industrial wireless systems.
Core Parameters
| Parameter | Specification |
|---|---|
| Frequency Range | 413–479 MHz, 826–958 MHz, 169 MHz |
| Modulation Types | 2-FSK, 4-FSK, GFSK, OOK |
| Sensitivity | –130 dBm (2-FSK, 0.3 kbps) |
| Output Power | Up to +16 dBm |
| Data Rate | 0.3 kbps to 500 kbps |
| RX Current | 7 mA |
| TX Current | 10 mA at 10 dBm |
| Sleep Mode Current | 0.7 µA |
| Supply Voltage | 1.8 V to 3.6 V |
| Operating Temperature | –40°C to +105°C |
| Package | QFN 24 (4 × 4 mm) |
Features
- Ultra-low consumption with 7 mA RX mode and sub-µA sleep mode
- High sensitivity (–130 dBm) supporting long-range and robust RF links
- Flexible output power up to +16 dBm for extended coverage
- Wide selectable data rates (0.3–500 kbps) for short and long distance communication needs
- Supports multiple modulations including 2-FSK, 4-FSK, GFSK, and OOK
- Integrated packet engine with preamble, sync word detection, CRC, and whitening
- Excellent blocking and selectivity for operation in congested ISM bands
- Ultra-compact QFN package suitable for small wireless modules
- Temperature robustness to +105°C, supporting industrial-grade environments
Typical Application Scenarios
| Application | Why S2-LPQTR Fits |
|---|---|
| Smart Metering (Gas, Water, Heat) | Long-range capability and ultra-low power enable multi-year battery operation |
| Building Automation | Strong sensitivity for multi-floor communication |
| Industrial IoT Nodes | Wide temperature range and low current consumption |
| Alarm & Security Systems | Reliable RF performance in noisy sub-GHz bands |
| Smart Agriculture Sensors | Long-distance communication with low maintenance |
| Wireless Sensor Networks | Flexible data rates and enhanced link robustness |
Performance Comparison
| Feature | S2-LPQTR | Typical Sub-GHz Transceiver | High-Performance Competitor |
|---|---|---|---|
| Sensitivity | –130 dBm | –115 to –125 dBm | –128 to –132 dBm |
| TX Power | +16 dBm | +10 to +14 dBm | +14 to +20 dBm |
| RX Current | 7 mA | 10–15 mA | 6–10 mA |
| Sleep Current | 0.7 µA | 1–5 µA | 0.5–1 µA |
| Max Data Rate | 500 kbps | 200–300 kbps | 300–600 kbps |
The S2-LPQTR lands in the sweet spot of low power, high sensitivity, and robust modulation flexibility, giving it broad advantages in long-range wireless sensor applications.
Conclusion
The S2-LPQTR offers a highly efficient and flexible solution for sub-GHz wireless communication. With its ultra-low current consumption, excellent sensitivity, and support for a wide set of modulation schemes, it is ideal for long-range, battery-powered IoT and industrial systems. Its compact package, programmable output power, and robust performance under interference make it a strong foundation for modern RF designs requiring long life and reliable connectivity.
Manufacturer Profile
The S2-LPQTR is manufactured by STMicroelectronics, a global leader in mixed-signal and low-power semiconductor solutions. ST’s wireless portfolio emphasizes long-range, low-power RF devices designed for IoT, industrial automation, smart metering, and energy-efficient communication systems.
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