BME280

Part: BME280 — Bosch Sensortec

Type: Combined Digital Humidity, Pressure and Temperature Sensor

Description: Digital humidity, pressure and temperature sensor with 1.71–3.6 V supply, I²C (up to 3.4 MHz) and SPI (up to 10 MHz) interfaces, ±3 %RH humidity accuracy, 0.2 Pa RMS pressure noise, in a 2.5 × 2.5 × 0.93 mm metal-lid LGA package.

Operating Conditions:

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

Absolute Maximum Ratings:

• Max supply voltage: 4.25 V (VDD and VDDIO pins)
• Voltage at any interface pin: -0.3 V to VDDIO + 0.3 V
• Storage temperature: -45 to +85 °C (≤ 65% RH)
• Max pressure: 20 000 hPa
• ESD: ±2 kV HBM, ±500 V CDM, ±200 V machine model

Key Specs:

• 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)
• Sleep mode current: 0.1 μA
• Humidity response time (τ63%): 1 s
• Humidity accuracy tolerance: ±3 % relative humidity
• Humidity hysteresis: ±1 % relative humidity
• Pressure RMS noise: 0.2 Pa (equiv. to 1.7 cm)
• Pressure offset temperature coefficient: ±1.5 Pa/K
• I²C up to 3.4 MHz; SPI (3- and 4-wire) up to 10 MHz

Features:

• Humidity and pressure sensors can be independently enabled or disabled
• Three power modes: sleep, normal, forced
• Selectable oversampling, IIR filter modes and data rates
• Integrated temperature sensor used for compensation of pressure and humidity
• Register and performance compatible with the Bosch Sensortec BMP280
• RoHS compliant, halogen-free, MSL1

Applications:

• Context awareness (skin detection, room change detection)
• Fitness monitoring and well-being
• Home automation control and HVAC
• Internet of things
• GPS enhancement and indoor/outdoor navigation
• Weather forecast
• Vertical velocity indication
• Handsets, watches, gaming and flying toys, cameras

Package:

• 2.5 mm × 2.5 mm × 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