BMP390L barometric pressure and temperature sensor — Bosch, I2C/SPI, 300–1250hPa, ultra-low power, LGA-12
The BMP390L is a high-precision barometric pressure and temperature sensor from Bosch Sensortec, designed for applications requiring accurate altitude measurement, weather monitoring, and indoor navigation. It offers a wide pressure measurement range of 300 to 1250 hPa with an absolute accuracy of ±50 Pa and a relative accuracy of ±8 Pa — enabling altitude resolution of approximately 0.66 metres in typical conditions.
The BMP390L features an ultra-low current consumption of just 3.4μA at 1Hz sampling, making it ideal for battery-powered wearables, drones, IoT nodes, and portable weather stations. It communicates via I2C or SPI and includes a 512-byte FIFO buffer for burst data collection without continuous MCU polling, further reducing system power consumption.
Key Specifications:
- Part number: BMP390L
- Manufacturer: Bosch Sensortec
- Pressure range: 300–1250 hPa
- Pressure absolute accuracy: ±50 Pa
- Pressure relative accuracy: ±8 Pa
- Temperature range: −40°C to +85°C
- Interface: I2C (up to 3.4MHz) and SPI (up to 10MHz)
- Supply voltage: 1.65V–3.6V
- Current consumption: 3.4μA at 1Hz
- FIFO: 512 bytes
- Package: LGA-12 (2.0 × 2.0 × 0.75mm)
Key Features:
- High relative accuracy (±8 Pa) — ~0.66m altitude resolution for drone and navigation use
- Ultra-low power (3.4μA at 1Hz) — ideal for always-on battery-powered sensing
- I2C and SPI interface — compatible with Arduino, ESP32, STM32, Raspberry Pi
- 512-byte FIFO — burst data logging without continuous MCU wake-up
- Wide supply voltage (1.65–3.6V) — compatible with 1.8V and 3.3V systems
Applications:
- Drone and UAV altitude hold
- Portable weather stations
- Indoor navigation and floor detection
- Wearable fitness devices
- IoT pressure and altitude logging
Note: Bare SMD LGA-12 component — requires SMD soldering or a breakout board for prototyping. Use Bosch BMP3-sensor-API or Adafruit BMP3XX library. Decouple supply with 100nF capacitor close to the sensor.