Overview
The BMP280 is an absolute barometric pressure sensor designed by Bosch Sensortec, specifically for mobile applications. It is housed in an extremely compact 8-pin LGA package with dimensions of 2.0 x 2.5 x 0.95 mm³. This sensor is ideal for battery-powered devices such as mobile phones, GPS modules, and watches due to its small size and low power consumption. The BMP280 uses Bosch’s proven piezo-resistive pressure sensor technology, offering high accuracy, linearity, long-term stability, and high EMC robustness.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Operating Temperature Range | Full Accuracy | -40 | 25 | +65 | °C |
| Operating Pressure Range | Full Accuracy | 300 | - | 1100 | hPa |
| Supply Voltage VDD | - | 1.71 | - | 3.6 | V |
| Supply Voltage VDDIO | - | 1.2 | - | 3.6 | V |
| Average Current Consumption @1Hz | - | - | 2.74 | - | µA |
| Average Current Consumption in Sleep Mode | - | - | 0.1 | - | µA |
| Pressure Resolution | - | - | 0.18 | - | Pa |
| Temperature Resolution | - | - | 0.01 | - | K |
| Interfaces | - | - | - | I²C, SPI (3-wire/4-wire) | - |
Key Features
- High Accuracy and Linearity: The BMP280 features high accuracy and linearity in pressure and temperature measurements, making it suitable for precise applications.
- Low Power Consumption: With an average current consumption of 2.74 µA at 1 Hz and 0.1 µA in sleep mode, it is ideal for battery-powered devices.
- Compact Package: The sensor is housed in a small 8-pin LGA package with dimensions of 2.0 x 2.5 x 0.95 mm³, allowing for easy integration into mobile devices.
- Multiple Operation Modes: The BMP280 can operate in sleep, normal, and forced modes, providing flexibility in measurement and power management.
- Oversampling and Filtering: The sensor supports independent oversampling rates for pressure and temperature measurements and includes a built-in IIR filter to minimize short-term disturbances.
- Dual Interface Support: It supports both I²C and SPI interfaces, enhancing its versatility in various applications.
Applications
- Mobile Devices: Suitable for mobile phones, tablet PCs, and GPS devices due to its compact size and low power consumption.
- Navigation Systems: Enhances GPS navigation, indoor navigation, floor detection, and elevator detection.
- Weather Forecasting: Used in home weather stations for accurate pressure and temperature readings.
- Wearable Devices: Ideal for watches and fitness trackers requiring precise pressure and temperature measurements.
- Leisure and Sports: Used in flying toys, outdoor navigation, and various sports applications.
Q & A
- What is the BMP280 sensor used for?
The BMP280 is an absolute barometric pressure sensor used for measuring pressure and temperature, especially in mobile applications such as mobile phones, GPS modules, and watches.
- What are the key features of the BMP280 sensor?
The BMP280 features high accuracy, low power consumption, a compact package, multiple operation modes, oversampling and filtering capabilities, and dual interface support (I²C and SPI).
- What are the operating modes of the BMP280 sensor?
The BMP280 can operate in sleep, normal, and forced modes. In sleep mode, no measurements are performed. Normal mode involves automated cycling between measurement and standby periods. Forced mode performs a single measurement and then returns to sleep mode.
- What interfaces does the BMP280 support?
The BMP280 supports both I²C and SPI (3-wire/4-wire) interfaces.
- What is the typical current consumption of the BMP280?
The typical current consumption of the BMP280 is 2.74 µA at a 1 Hz data refresh rate and 0.1 µA in sleep mode.
- How accurate is the BMP280 in terms of pressure measurement?
The BMP280 has a relative accuracy of ±0.12 hPa (equivalent to ±1 m difference in altitude) and an absolute accuracy of ±1 hPa in the range of 950 to 1100 hPa.
- Can the BMP280 be used as an altimeter?
Yes, the BMP280 can be used as an altimeter based on barometric pressure measurements. It provides functions for altitude calculations.
- What is the temperature range for the BMP280?
The operating temperature range for the BMP280 is -40°C to +85°C, with full accuracy guaranteed between 0°C and +65°C.
- Does the BMP280 have built-in filtering capabilities?
Yes, the BMP280 is equipped with a built-in IIR filter to minimize short-term disturbances in the output data.
- How does the BMP280 compare to its predecessor, the BMP180?
The BMP280 has a smaller footprint (63% smaller than the BMP180), lower noise, new filter modes, and an additional SPI interface. It also offers higher relative accuracy and lower power consumption compared to the BMP180.
