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PDF BME280 Data sheet ( Hoja de datos )
| Número de pieza | BME280 | |
| Descripción | Combined humidity and pressure sensor | |
| Fabricantes | Bosch | |
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Final data sheet
BME280
Combined humidity and pressure sensor
Bosch Sensortec
BME280: Final data sheet
Document revision
Document release date
Document number
Technical reference code(s)
Notes
1.1
May 07th, 2015
BST-BME280-DS001-10
0 273 141 185
Data in this document are subject to change without notice. Product
photos and pictures are for illustration purposes only and may differ from
the real product’s appearance.
1 page  
Final Datasheet
BME280 Environmental sensor
Page 5
5.4.1 REGISTER 0XD0 “ID” .....................................................................................................................25
5.4.2 REGISTER 0XE0 “RESET”...............................................................................................................25
5.4.3 REGISTER 0XF2 “CTRL_HUM” ........................................................................................................25
5.4.4 REGISTER 0XF3 “STATUS” .............................................................................................................26
5.4.5 REGISTER 0XF4 “CTRL_MEAS”.......................................................................................................26
5.4.6 REGISTER 0XF5 “CONFIG” .............................................................................................................27
5.4.7 REGISTER 0XF7…0XF9 “PRESS” (_MSB, _LSB, _XLSB)...................................................................28
5.4.8 REGISTER 0XFA…0XFC “TEMP” (_MSB, _LSB, _XLSB)....................................................................29
5.4.9 REGISTER 0XFD…0XFE “HUM” (_MSB, _LSB) ................................................................................29
6. DIGITAL INTERFACES............................................................................................................30
6.1 INTERFACE SELECTION ...................................................................................................... 30
6.2 I²C INTERFACE.................................................................................................................. 30
6.2.1 I²C WRITE .....................................................................................................................................31
6.2.2 I²C READ ......................................................................................................................................31
6.3 SPI INTERFACE................................................................................................................. 32
6.3.1 SPI WRITE ....................................................................................................................................33
6.3.2 SPI READ .....................................................................................................................................33
6.4 INTERFACE PARAMETER SPECIFICATION ............................................................................. 34
6.4.1 GENERAL INTERFACE PARAMETERS................................................................................................34
6.4.2 I²C TIMINGS ..................................................................................................................................34
6.4.3 SPI TIMINGS .................................................................................................................................35
7. PIN-OUT AND CONNECTION DIAGRAM...............................................................................37
7.1 PIN-OUT ........................................................................................................................... 37
7.2 CONNECTION DIAGRAM I2C................................................................................................ 38
7.3 CONNECTION DIAGRAM 4-WIRE SPI ................................................................................... 39
7.4 CONNECTION DIAGRAM 3-WIRE SPI ................................................................................... 40
7.5 PACKAGE DIMENSIONS ...................................................................................................... 41
7.6 LANDING PATTERN RECOMMENDATION ............................................................................... 42
7.7 MARKING.......................................................................................................................... 43
7.7.1 MASS PRODUCTION DEVICES .........................................................................................................43
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
BST-BME280-DS001-10 | Revision 1.1 | May 2015
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.
5 Page 
Final Datasheet
BME280 Environmental sensor
Page 11
Table 5: Absolute maximum ratings
Parameter
Condition
Min
Max
Unit
Voltage at any supply pin
Voltage at any interface pin
Storage temperature
VDD and VDDIO pin
≤ 65% RH
-0.3 4.25 V
-0.3
VDDIO + 0.3
V
-45 +85 °C
Pressure
0
20 000
hPa
HBM, at any pin
±2 kV
ESD
CDM
±500
V
Machine model
±200
V
Condensation
No power supplied
Allowed
3. Functional description
3.1 Block diagram
Figure 2 shows a simplified block diagram of the BME280:
VDD
VDDIO
Pressure
sensing
element
Humidity
sensing
element
Temperature
sensing
element
Pressure
front-end
Humidity
front-end
Temperature
front-end
Voltage
regulator
(analog &
digital)
ADC
Voltage
reference
Logic
OSC POR NVM
I
n
t
e
r
f
a
c
e
SDI
SDO
SCK
CSB
GND
Figure 2: Block diagram of BME280
3.2 Power management
The BME280 has two distinct power supply pins
VDD is the main power supply for all internal analog and digital functional blocks
VDDIO is a separate power supply pin used for the supply of the digital interface
A power-on reset (POR) generator is built in; it resets the logic part and the register values after
both VDD and VDDIO reach their minimum levels. There are no limitations on slope and sequence
BST-BME280-DS001-10 | Revision 1.1 | May 2015
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.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BME280.PDF ] | |
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