BME280

Part: BME280 — Bosch Sensortec

Type: Combined Humidity, Pressure, and Temperature Sensor

Description: Digital humidity, pressure, and temperature sensor in a 2.5 x 2.5 x 0.93 mm metal lid LGA package, featuring I²C and SPI interfaces, and ultra-low power consumption down to 0.1 μA in sleep mode.

Operating Conditions:

• Supply voltage: VDD: 1.71 V to 3.6 V; VDDIO: 1.2 V to 3.6 V
• Operating temperature: -40 to +85 °C
• Operating humidity: 0 to 100 % rel. humidity
• Operating pressure: 300 to 1100 hPa

Absolute Maximum Ratings:

• Max supply voltage: 4.25 V
• Max storage temperature: +85 °C

Key Specs:

• Humidity accuracy tolerance: ±3 % relative humidity
• Humidity response time (𝜏63%): 1 s
• Pressure RMS Noise: 0.2 Pa
• Pressure offset temperature coefficient: ±1.5 Pa/K
• Sleep mode current consumption: 0.1 μA
• I²C interface speed: up to 3.4 MHz
• SPI interface speed: up to 10 MHz

Features:

• 2.5 mm x 2.5 mm x 0.93 mm metal lid LGA package
• Digital interface: I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
• Humidity sensor and pressure sensor can be independently enabled / disabled
• Register and performance compatible to Bosch Sensortec BMP280 digital pressure sensor
• RoHS compliant, halogen-free, MSL1
• Three power modes: sleep, normal, forced
• Configurable oversampling, filter modes, and data rates

Applications:

• Context awareness, e.g. skin detection, room change detection
• Fitness monitoring / well-being
• Warning regarding dryness or high temperatures
• Measurement of volume and air flow
• Home automation control (heating, venting, air conditioning (HVAC))
• Internet of things
• GPS enhancement (e.g. time-to-first-fix improvement, dead reckoning, slope detection)
• Indoor navigation (change of floor detection, elevator detection)
• Outdoor navigation, leisure and sports applications
• Weather forecast
• Vertical velocity indication (rise/sink speed)

Package:

• 2.5 mm x 2.5 mm x 0.93 mm metal lid LGA

• Package

2.5 mm x 2.5 mm x 0.93 mm metal lid LGA

• Digital interface

I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)

• Supply voltage

VDD main supply voltage range: 1.71 V to 3.6 V

VDDIO interface voltage range: 1.2 V to 3.6 V

• Current consumption

1.8 μA @ 1 Hz humidity and temperature

2.8 μA @ 1 Hz pressure and temperature

3.6 μA @ 1 Hz humidity, pressure and temperature

0.1 μA in sleep mode

• •

• Operating range -40…+85 °C, 0…100 % rel. humidity, 300…1100 hPa

• Humidity sensor and pressure sensor can be independently enabled / disabled

• Register and performance compatible to Bosch Sensortec BMP280 digital pressure sensor

• RoHS compliant, halogen-free, MSL1

The absolute maximum ratings are determined over complete temperature range using corner lots. The values are provided in Table 5.

Table 5: Absolute maximum ratings

• Context awareness, e.g. skin detection, room change detection
• Fitness monitoring / well-being
• Warning regarding dryness or high temperatures
• Measurement of volume and air flow
• Home automation control
• control heating, venting, air conditioning (HVAC)
• Internet of things
• GPS enhancement (e.g. time-to-first-fix improvement, dead reckoning, slope detection)
• Indoor navigation (change of floor detection, elevator detection)
• Outdoor navigation, leisure and sports applications
• Weather forecast
• Vertical velocity indication (rise/sink speed)

Figure 20: Package dimensions for top, bottom and side view