BME280 datasheet(48/60 Pages) BOSCH

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Bosch Sensortec | BME280 Data sheet

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Modifications reserved | Data subject to change without notice

Document number: BST-BME280-DS001-23 Revision_1.23_012022

7.11 Mounting and assembly recommendations

In order to achieve the specified performance for you design, the following recommendations and the

“Handling, soldering & mounting instructions BME280” should be taken into consideration when

mounting a pressure sensor on a printed-circuit board (PCB):

•

The clearance above the metal lid shall be 0.1mm at minimum.

•

For the device housing appropriate venting needs to be provided in case the ambient pressure

shall be measured.

•

Liquids shall not come into direct contact with the device.

•

During operation the sensor chip is sensitive to light, which can influence the accuracy of the

measurement (photo-current of silicon). The position of the vent hole minimizes the light

exposure of the sensor chip. Nevertheless, Bosch Sensortec recommends avoiding the

exposure of BME280 to strong light sources.

•

Soldering may not be done using vapor phase processes since the sensor will be damaged by

the liquids used in these processes.

7.12 Environmental safety

7.12.1

RoHS

The BME280 sensor meets the requirements of the EC restriction of hazardous substances (RoHS)

directive, see also:

RoHS–Directive 2011/65/EU and its amendments, including the amendment 2015/863/EU on

the restriction of the use of certain hazardous substances in electrical and electronic

equipment.

7.12.2

Halogen content

The BME280 is halogen-free. For more details on the analysis results please contact your Bosch

Sensortec representative.

7.12.3

Internal package structure

Within the scope of Bosch Sensortec’s ambition to improve its products and secure the mass product

supply, Bosch Sensortec qualifies additional sources (e.g. 2nd source) for the package of the BME280.

While Bosch Sensortec took care that all of the technical packages parameters are described above

are 100% identical for all sources, there can be differences in the chemical content and the internal

structural between the different package sources.

However, as secured by the extensive product qualification process of Bosch Sensortec, this has no

impact to the usage or to the quality of the BME280 product.

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