bmp280 datasheet

Bosch
Sensortec | BMP280 Data sheet
15 |
48
Modifications reserved | Data subject to change without notice
Document number: BST-BMP280-DS001-23 Revision_1.23_11202
0
3.5 Noise
Noise depends on the oversampling and filter settings selected. The stated values were determined in
a controlled pressure environment and are based on the average standard deviation of 32 consecutive
measurement points taken at highest sampling speed. This is needed in order to exclude long term
drifts from the noise measurement.
Table 8: Noise in pressure
Typical RMS noise in pressure [Pa]
Oversampling setting IIR filter coefficient
off 2 4 8 16
Ultra low power
3.3
1.9
1.2
0.9
0.4
Low power 2.6 1.5 1.0 0.6 0.4
Standard resolution
2.1
1.2
0.8
0.5
0.3
High resolution
1.6
1.0
0.6
0.4
0.2
Ultra high resolution
1.3
0.8
0.5
0.4
0.2
Table 9: Noise in temperature
Typical RMS noise in temperature [°C]
Temperature oversampling IIR filter off
oversampling ×1
0.005
oversampling ×2
0.004
oversampling ×4
0.003
oversampling ×8
0.003
oversampling ×16
0.002
3.6 Power modes
The BMP280 offers three power modes: sleep mode, forced mode and normal mode. These can be
selected using the mode[1:0] bits in control register 0xF4.
Table 10: mode settings
mode[1:0] Mode
00 Sleep mode
01 and 10 Forced mode
11 Normal mode