Overview
The BME280 is an integrated environmental sensor developed by Bosch Sensortec, specifically designed for mobile applications and wearables where size and low power consumption are critical. This sensor combines high linearity and high accuracy sensors for pressure, humidity, and temperature in a compact 8-pin metal-lid LGA package measuring 2.5 x 2.5 x 0.93 mm³. It is optimized for low current consumption, long-term stability, and high EMC robustness, making it ideal for emerging applications such as context awareness, fitness monitoring, and home automation control.
Key Specifications
| Parameter | Technical Data |
|---|---|
| Package Dimensions | 8-Pin LGA with metal, 2.5 x 2.5 x 0.93 mm³ |
| Operation Range | Pressure: 300 ... 1100 hPa, Temperature: -40 … +85 °C, Humidity: 0 ... 100% RH |
| Supply Voltage | VDD: 1.71 ... 3.6 V, VDDIO: 1.2 ... 3.6 V |
| Interface | I²C and SPI (3-wire/4-wire) |
| Average Current Consumption (typ.) @ 1 Hz | 1.8 μA (H, T), 2.8 μA (P, T), 3.6 μA (H, P, T) |
| Average Current Consumption in Sleep Mode | 0.1 μA |
| Humidity Sensor Response Time (τ63%) | 1 s |
| Humidity Sensor Accuracy Tolerance | ±3% relative humidity |
| Humidity Sensor Hysteresis | ≤2% relative humidity |
| Pressure Sensor RMS Noise | 0.2 Pa (equiv. to 1.7 cm) |
| Pressure Sensor Sensitivity Error | ±0.25% (equiv. to 1 m at 400 m height change) |
| Pressure Sensor Temperature Coefficient Offset | ±1.5 Pa/K (equiv. to ±12.6 cm at 1 °C temperature change) |
Key Features
- High accuracy and linearity for pressure, humidity, and temperature measurements.
- Low power consumption with typical current consumption of 3.6 μA @ 1 Hz for all sensors and 0.1 μA in sleep mode.
- Compact 8-pin LGA package suitable for mobile and wearable applications.
- Supports I²C and SPI interfaces for flexible communication.
- Fast response time, especially for the humidity sensor, which is crucial for context awareness and other emerging applications.
- High EMC robustness and long-term stability.
- RoHS compliant, halogen-free, and MSL1 certified.
Applications
- Context awareness, such as skin detection and room change detection.
- Fitness monitoring and well-being, including warnings for dryness or high temperatures and measurements of volume and air flow.
- Home automation control and personalized weather stations.
- Innovative sport and fitness tools, including indoor navigation and air quality monitoring.
Q & A
- What is the BME280 sensor?
The BME280 is an integrated environmental sensor developed by Bosch Sensortec, combining high accuracy sensors for pressure, humidity, and temperature. - What are the key applications of the BME280?
The BME280 is used in context awareness, fitness monitoring, home automation, and innovative sport and fitness tools. - What are the power consumption characteristics of the BME280?
The BME280 has a typical current consumption of 3.6 μA @ 1 Hz for all sensors and 0.1 μA in sleep mode. - What interfaces does the BME280 support?
The BME280 supports both I²C and SPI (3-wire/4-wire) interfaces. - What is the operating temperature range of the BME280?
The operating temperature range is -40°C to +85°C. - How accurate is the humidity sensor of the BME280?
The humidity sensor has an accuracy tolerance of ±3% relative humidity. - What is the response time of the humidity sensor in the BME280?
The response time of the humidity sensor is 1 second. - Is the BME280 RoHS compliant?
Yes, the BME280 is RoHS compliant, halogen-free, and MSL1 certified. - What are the dimensions of the BME280 package?
The package dimensions are 2.5 x 2.5 x 0.93 mm³. - Can the BME280 be used in wearable devices?
Yes, the BME280 is specifically designed for mobile applications and wearables due to its small size and low power consumption.
