Environmental sensor measures barometric pressure, temperature and relative humidity

Bosch's BME280 is an integrated environmental sensor, available from Digi-Key, has been developed specifically for mobile applications, where size and low-power consumption are key design constraints. The unit combines individual high-linearity, high-accuracy sensors for pressure, humidity, and temperature in an 8-pin, metal-lid, 2.5mm x 2.5mm x 0.93mm³ LGA package, designed for low current consumption (3.6µA at 1Hz), long-term stability, and high EMC robustness. The humidity sensor features an extremely fast response time which supports performance requirements for emerging applications, such as context awareness, and high accuracy over a wide temperature range. The pressure sensor is an absolute barometric pressure sensor which features exceptionally high accuracy and resolution at very-low noise. The integrated temperature sensor has been optimised for very-low noise and high resolution. It is primarily used for temperature compensation of the pressure and humidity sensors and can also be used for estimating ambient temperature. The device supports a full suite of operating modes which provide the flexibility to optimise the device for power consumption, resolution, and filter performance.