Data Sheet

Bosch Sensortec | BME280 Data sheet
6 | 55
Modifications reserved | Data subject to change without notice
Document number: BST-BME280-DS002-15
Revision_1.6_092018
7. Pin-out and connection diagram .................................................................................................. 38
7.1 Pin-out ..................................................................................................................................... 38
7.2 Connection diagram I
2
C........................................................................................................... 39
7.3 Connection diagram 4-wire SPI ............................................................................................... 40
7.4 Connection diagram 3-wire SPI ............................................................................................... 41
7.5 Package dimensions ............................................................................................................... 42
7.6 Landing pattern recommendation ............................................................................................ 43
7.7 Marking .................................................................................................................................... 44
7.7.1 Mass production devices ........................................................................................ 44
7.7.2 Engineering samples .............................................................................................. 44
7.8 Soldering guidelines and reconditioning recommendations .................................................... 45
7.9 Reconditioning Procedure ....................................................................................................... 46
7.10 Tape and reel specification ...................................................................................................... 46
7.10.1 Dimensions ............................................................................................................. 46
7.10.2 Orientation within the reel ....................................................................................... 47
7.11 Mounting and assembly recommendations ............................................................................. 48
7.12 Environmental safety ............................................................................................................... 48
7.12.1 RoHS ...................................................................................................................... 48
7.12.2 Halogen content ...................................................................................................... 48
7.12.3 Internal package structure ...................................................................................... 48
8. Appendix A: Alternative compensation formulas ....................................................................... 49
8.1 Compensation formulas in double precision floating point ...................................................... 49
8.2 Pressure compensation in 32 bit fixed point ............................................................................ 50
9. Appendix B: Measurement time and current calculation ........................................................... 51
9.1 Measurement time ................................................................................................................... 51
9.2 Measurement rate in forced mode .......................................................................................... 51
9.3 Measurement rate in normal mode.......................................................................................... 51
9.4 Response time using IIR filter .................................................................................................. 52