Humidity sensor measuring relative humidity, barometric pressure and ambient temperature
The BME280 is a humidity sensor especially developed for mobile applications and wearables where size and low power consumption are key design parameters. The unit combines high linearity and high accuracy sensors and is perfectly feasible for low current consumption, long-term stability and high EMC robustness. The humidity sensor offers an extremely fast response time and therefore supports performance requirements for emerging applications such as context awareness, and high accuracy over a wide temperature range.
Technical data
| Parameter | Technical data |
|---|---|
| Operation range (full accuracy) |
Pressure: 300…1100 hPa Temperature: -40…85°C |
|
Absolute accuracy (Temp. @ 0…+65°C) |
~ ±1 hPa ± 0.12 hPa (typical) equivalent to ±1 m |
|
Relative accuracy p = 700…900hPa (Temp. @ +25…+40°C) | 3.4 μA @ 1 Hz |
| Average typical current consumption (1 Hz data rate) | ±0.50 hPa |
|
Absolute accuracy pressure (typ.) P=300 …1100 hPa (T=0 … 65 °C) |
±0.06 hPa (equivalent to ±50 cm) |
|
Relative accuracy pressure (typ.) P=900…1100 hPa (T=25…40°C) |
2.74 μA, typical (ultra-low power mode) 0.1 μA 5.5 msec (ultra-low power preset) |
| Average current consumption (1 Hz data refresh rate) | 1.2 … 3.6 V |
| Average current consumption in sleep mode | 1.71 … 3.6 V |
| Average measurement time |
Pressure: 0.01 hPa ( < 10 cm) Temperature: 0.01° C |
| Supply voltage VDDIO | 1.5 Pa/K, equiv. to 12.6 cm/K |
|
Supply voltage VDD Resolution of data | I²C and SPI |
|
Temperature coefficient offset (+25°…+40°C @900hPa) Interface Package dimensions |
8-Pin LGA with metal 2.0 x 2.5 x 0.95 mm³ |
