Datasheet

BMP280 Digital Pressure Sensor

Page 15

BST-BMP280-DS001-19 | Revision 1.19 | January 2018

Bosch Sensortec

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Note: Specifications within this document are subject to change without notice. Not intended for publication.

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