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BMP280 Datasheet(PDF) 10 Page - Bosch Sensortec GmbH

Part # BMP280
Description  Digital Pressure Sensor
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Manufacturer  BOSCH [Bosch Sensortec GmbH]
Direct Link  https://www.bosch-sensortec.com
Logo BOSCH - Bosch Sensortec GmbH

BMP280 Datasheet(HTML) 10 Page - Bosch Sensortec GmbH

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BMP280 Digital Pressure Sensor
Page 10
BST-BMP280-DS001-19 | Revision 1.19 | January 2018
Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice. Not intended for publication.
3. Functional description
The BMP280 consists of a Piezo-resistive pressure sensing element and a mixed-signal ASIC.
The ASIC performs A/D conversions and provides the conversion results and sensor specific
compensation data through a digital interface.
BMP280 provides highest flexibility to the designer and can be adapted to the requirements
regarding accuracy, measurement time and power consumption by selecting from a high number
of possible combinations of the sensor settings.
BMP280 can be operated in three power modes (see chapter 3.6):
 sleep mode
 normal mode
 forced mode
In sleep mode, no measurements are performed. Normal mode comprises an automated
perpetual cycling between an active measurement period and an inactive standby period. In
forced mode, a single measurement is performed. When the measurement is finished, the sensor
returns to sleep mode.
A set of oversampling settings is available ranging from ultra low power to ultra high resolution
setting in order to adapt the sensor to the target application. The settings are predefined
combinations of pressure measurement oversampling and temperature measurement
oversampling. Pressure and temperature measurement oversampling can be selected
independently from 0 to 16 times oversampling (see chapter 3.3.1 and 3.3.2):
 Temperature measurement
 Ultra low power
 Low power
 Standard resolution
 High resolution
 Ultra high resolution
BMP280 is equipped with a built-in IIR filter in order to minimize short-term disturbances in the
output data caused by the slamming of a door or window. The filter coefficient ranges from 0 (off)
to 16.
In order to simplify the device usage and reduce the high number of possible combinations of
power modes, oversampling rates and filter settings, Bosch Sensortec provides a proven set of
recommendations for common use-cases in smart-phones, mobile weather stations or flying toys
(see chapter 3.4):
 Handheld device low-power (e.g. smart phones running Android)
 Handheld device dynamic (e.g. smart phones running Android)
 Weather monitoring (setting with lowest power consumption)
 Elevator / floor change detection
 Drop detection
 Indoor navigation

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