Datasheet

BMP280 Digital Pressure Sensor

Page 4

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.

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................................................................................................................................ 16

3.6.2 FORCED MODE............................................................................................................................. 16

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 ................................................................................................................ 19

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

4. GLOBAL MEMORY MAP AND REGISTER DESCRIPTION..................................................24

4.1 GENERAL REMARKS .......................................................................................................... 24

4.2 MEMORY MAP ................................................................................................................... 24

4.3 REGISTER DESCRIPTION.................................................................................................... 24

4.3.1 REGISTER 0XD0 “ID” .................................................................................................................... 24

4.3.2 REGISTER 0XE0 “RESET”.............................................................................................................. 24

4.3.3 REGISTER 0XF3 “STATUS” ............................................................................................................ 25

4.3.4 REGISTER 0XF4 “CTRL_MEAS”...................................................................................................... 25

4.3.5 REGISTER 0XF5 “CONFIG” ............................................................................................................ 26

4.3.6 REGISTER 0XF7…0XF9 “PRESS” (_MSB, _LSB, _XLSB).................................................................. 26

4.3.7 REGISTER 0XFA…0XFC “TEMP” (_MSB, _LSB, _XLSB)................................................................... 27