Bosch Sensortec | BMP280 Data sheet

4 |

49

Modifications reserved | Data subject to change without notice

Document number: BST-BMP280-DS001-26 Revision_1.26_102021

Index of Contents

1. Specification ......................................................................................................................................7

2. Absolute maximum ratings ..............................................................................................................9

3. Functional description................................................................................................................... 10

3.1 Block Diagram ......................................................................................................................... 11

3.2 Power management ................................................................................................................ 11

3.3 Measurement flow ................................................................................................................... 11

3.3.1 Pressure measurement .......................................................................................... 12

3.3.2 Temperature measurement .................................................................................... 13

3.3.3 IIR filter.................................................................................................................... 13

3.4 Filter selection..........................................................................................................................14

3.5 Noise........................................................................................................................................15

3.6 Power modes...........................................................................................................................15

3.6.1 Sleep mode............................................................................................................. 15

3.6.2 Forced mode........................................................................................................... 15

3.6.3 Normal mode .......................................................................................................... 16

3.6.4 Mode transition diagram ......................................................................................... 17

3.7 Current consumption ...............................................................................................................18

3.8 Measurement timings ..............................................................................................................18

3.8.1 Measurement time .................................................................................................. 18

3.8.2 Measurement rate in normal mode......................................................................... 19

3.9 Data readout............................................................................................................................20

3.10 Data register shadowing..........................................................................................................20

3.11 Output compensation ..............................................................................................................20

3.11.1 Computational requirements .................................................................................. 20

3.11.2 Trimming parameter readout .................................................................................. 21

3.11.3 Compensation formula............................................................................................ 21

3.12 Calculating pressure and temperature ....................................................................................22