bmp280 datasheet
Table Of Contents
- 1. Specification
- 2. Absolute maximum ratings
- 3. Functional description
- 4. Global memory map and register description
- 5. Digital interfaces
- 6. Pin-out and connection diagram
- 7. Package, reel and environment
- 8. Appendix 1: Computation formulae for 32 bit systems
- 9. Legal disclaimer
- 10. Document history and modification
Bosch
Sensortec | BMP280 Data sheet
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Modifications reserved | Data subject to change without notice
Document number: BST-BMP280-DS001-23 Revision_1.23_11202
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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