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BST-BMP280-DS001-09-371189(文件:BST-BMP280-DS001-09-371189).pdf

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    Data sheet BMP280 Digital Pressure Sensor Bosch Sensortec BMP280: Data sheet Document revision 1.12 Document release date July 11th, 2014 Document number BST-BMP280-DS001-10 Technical reference code(s) 0 273 300 354 Notes 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.
    Datasheet BMP280 Digital Pressure Sensor Page 2 BMP280 DIGITAL PRESSURE SENSOR Key parameters  Pressure range  Package 300 … 1100 hPa (equiv. to +9000…-500 m above/below sea level) 8-pin LGA metal-lid Footprint : 2.0 × 2.5 mm², height: 0.95 mm  Relative accuracy (950 … 1050hPa @25°C) ±0.12 hPa, equiv. to ±1 m  Absolute accuracy (950 ...1050 hPa, 0 ...+40 °C) typ. ±1 hPa  Temperature coefficient offset 1.5 Pa/K, equiv. to 12.6 cm/K (25 ... 40°C @900hPa)  Digital interfaces I²C (up to 3.4 MHz) SPI (3 and 4 wire, up to 10 MHz)  Current consumption 2.7µA @ 1 Hz sampling rate  Temperature range -40 … +85 °C  RoHS compliant, halogen-free  MSL 1 Typical applications  Enhancement of GPS navigation (e.g. time-to-first-fix improvement, dead-reckoning, slope detection) Indoor navigation (floor detection, elevator detection)   Outdoor navigation, leisure and sports applications  Weather forecast  Health care applications (e.g. spirometry)  Vertical velocity indication (e.g. rise/sink speed) Target devices  Handsets such as mobile phones, tablet PCs, GPS devices  Navigation systems  Portable health care devices  Home weather stations  Flying toys  Watches BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 3 General Description Robert Bosch is the world market leader for pressure sensors in automotive and consumer applications. Bosch’s proprietary APSM (Advanced Porous Silicon Membrane) MEMS manufacturing process is fully CMOS compatible and allows a hermetic sealing of the cavity in an all silicon process. The BMP280 is based on Bosch’s proven Piezo-resistive pressure sensor technology featuring high EMC robustness, high accuracy and linearity and long term stability. The BMP280 is an absolute barometric pressure sensor especially designed for mobile applications. The sensor module is housed in an extremely compact 8-pin metal-lid LGA package with a footprint of only 2.0 × 2.5 mm2 and 0.95 mm package height. Its small dimensions and its low power consumption of 2.7 µA @1Hz allow the implementation in battery driven devices such as mobile phones, GPS modules or watches. As the successor to the widely adopted BMP180, the BMP280 delivers high performance in all applications that require precise pressure measurement. The BMP280 operates at lower noise, supports new filter modes and an SPI interface within a footprint 63% smaller than the BMP180. The emerging applications of in-door navigation, health care as well as GPS refinement require a high relative accuracy and a low TCO at the same time. BMP180 and BMP280 are perfectly suitable for applications like floor detection since both sensors feature excellent relative accuracy is ±0.12 hPa, which is equivalent to ±1 m difference in altitude. The very low offset temperature coefficient (TCO) of 1.5 Pa/K translates to a temperature drift of only 12.6 cm/K. Please contact your regional Bosch Sensortec partner for more information about software packages enhancing the calculation of the altitude given by the BMP280 pressure reading. Table 1: Comparison between BMP180 and BMP280 Parameter Footprint Minimum VDD Minimum VDDIO Current consumption @3 Pa RMS noise RMS Noise Pressure resolution Temperature resolution Interfaces BMP180 BMP280 3.6 × 3.8 mm 2.0 × 2.5 mm 1.80 V 1.62 V 12 µA 3 Pa 1 Pa 0.1°C I²C 1.71 V 1.20 V 2.7 µA 1.3 Pa 0.18 Pa 0.01°C I²C & SPI (3 and 4 wire, mode ‘00’ and ‘11’) Measurement modes Only P or T, forced P&T, forced or periodic Measurement rate up to 120 Hz up to 157 Hz Filter options None Five bandwidths BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 4 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 BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 5 5. DIGITAL INTERFACES ............................................................................................................ 28 5.1 INTERFACE SELECTION ...................................................................................................... 28 5.2 I²C INTERFACE.................................................................................................................. 28 5.2.1 I²C WRITE .................................................................................................................................... 29 5.2.2 I²C READ ..................................................................................................................................... 29 5.3 SPI INTERFACE ................................................................................................................. 30 5.3.1 SPI WRITE ................................................................................................................................... 31 5.3.2 SPI READ .................................................................................................................................... 31 5.4 INTERFACE PARAMETER SPECIFICATION ............................................................................. 32 5.4.1 GENERAL INTERFACE PARAMETERS ............................................................................................... 32 5.4.2 I²C TIMINGS ................................................................................................................................. 32 5.4.3 SPI TIMINGS ................................................................................................................................ 33 6. PIN-OUT AND CONNECTION DIAGRAM ............................................................................... 35 6.1 PIN-OUT ........................................................................................................................... 35 6.2 CONNECTION DIAGRAM 4-WIRE SPI ................................................................................... 36 6.3 CONNECTION DIAGRAM 3-WIRE SPI ................................................................................... 37 6.4 CONNECTION DIAGRAM I2C ................................................................................................ 38 7. PACKAGE, REEL AND ENVIRONMENT ................................................................................ 39 7.1 OUTLINE DIMENSIONS ....................................................................................................... 39 7.2 LANDING PATTERN RECOMMENDATION ............................................................................... 40 7.3 MARKING .......................................................................................................................... 41 7.3.1 MASS PRODUCTION DEVICES ........................................................................................................ 41 7.3.2 ENGINEERING SAMPLES ................................................................................................................ 41 7.4 SOLDERING GUIDELINES .................................................................................................... 42 7.5 TAPE AND REEL SPECIFICATION ......................................................................................... 43 7.5.1 DIMENSIONS ................................................................................................................................ 43 7.5.2 ORIENTATION WITHIN THE REEL ..................................................................................................... 43 7.6 MOUNTING AND ASSEMBLY RECOMMENDATIONS ................................................................. 44 7.7 ENVIRONMENTAL SAFETY .................................................................................................. 44 7.7.1 ROHS ......................................................................................................................................... 44 7.7.2 HALOGEN CONTENT ..................................................................................................................... 44 7.7.3 INTERNAL PACKAGE STRUCTURE ................................................................................................... 44 8. APPENDIX 1: COMPUTATION FORMULAE FOR 32 BIT SYSTEMS .................................. 44 8.1 COMPENSATION FORMULA IN FLOATING POINT .................................................................... 44 8.2 COMPENSATION FORMULA IN 32 BIT FIXED POINT ................................................................ 45 9. LEGAL DISCLAIMER ............................................................................................................... 47 9.1 ENGINEERING SAMPLES .................................................................................................... 47 BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 6 9.2 PRODUCT USE .................................................................................................................. 47 9.3 APPLICATION EXAMPLES AND HINTS ................................................................................... 47 10. DOCUMENT HISTORY AND MODIFICATION ..................................................................... 48 BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 7 1. Specification If not stated otherwise,  All values are valid over the full voltage range  All minimum/maximum values are given for the full accuracy temperature range  Minimum/maximum values of drifts, offsets and temperature coefficients are ±3 values over lifetime  Typical values of currents and state machine timings are determined at 25 °C  Minimum/maximum values of currents are determined using corner lots over complete temperature range  Minimum/maximum values of state machine timings are determined using corner lots over 0…+65 °C temperature range The specification tables are split into pressure and temperature part of BMP280 Table 2: Parameter specification Parameter Symbol Condition operational full accuracy Min -40 0 full accuracy 300 Operating temperature range Operating pressure range TA P Sensor supply voltage VDD ripple max. 50mVpp 1.71 Interface supply voltage VDDIO 1.2 Supply current IDD,LP Peak current Current at temperature measurement Ipeak IDDT 1 Hz forced mode, pressure and temperature, lowest power during pressure measurement Sleep current1 IDDSL 25 °C Standby current (inactive period of normal mode) 2 Relative accuracy pressure3 VDD = 3.3V IDDSB 25 °C Arel 700 … 900hPa 25 . . . 40 °C 1 Typical value at VDD = VDDIO = 1.8 V, maximal value at VDD = VDDIO = 3.6 V. 2 Typical value at VDD = VDDIO = 1.8 V, maximal value at VDD = VDDIO = 3.6 V. 3 Target values Typ Max Units 25 1.8 1.8 +85 +65 °C 1100 hPa 3.6 3.6 V V 2.8 4.2 µA 720 1120 µA 325 µA 0.1 0.3 µA 0.2 0.5 µA ±0.12 ±1.0 hPa m BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
    Datasheet BMP280 Digital Pressure Sensor Page 8 Offset temperature coefficient3 Absolute accuracy pressure Resolution of output data in ultra high resolution mode4 Noise in pressure TCO AP ext AP full RP RT Vp,full Vp,filtered Absolute accuracy temperature5 AT 900hPa 25 . . . 40 °C 300 . . . 1100 hPa -20 . . . 0 °C 300 . . . 1100 hPa 0 . . . 65 °C Pressure Temperature Full bandwidth, ultra high resolution See chapter 3.5 Lowest bandwidth, ultra high resolution See chapter 3.5 @ 25 °C 0 . . . +65 °C PSRR (DC) PSRR full VDD range Long term stability6 Pstab 12 months ±1.5 12.6 ±1.7 ±1.0 0.0016 0.01 1.3 11 0.2 1.7 ±0.5 ±1.0 ±0.005 ±1.0 Pa/K cm/K hPa hPa hPa °C Pa cm Pa cm °C °C Pa/ mV hPa Solder drifts  Start-up time tstartup Possible sampling rate fsample Minimum solder height 50 µm Time to first communication after both VDD > 1.58V and VDDIO > 0.65V osrs_t = osrs_p = 1; See chapter 3.8 -0.5 +2 hPa 2 ms 157 182 tbd7 Hz Standby time accuracy tstandby ±5 ±25 % 4 Using double precision or 64 bit integer compensation formula, 16×oversampling 5 Temperature measured by the internal temperature sensor. This temperature value depends on the PCB temperature, sensor element self-heating and ambient temperature and is typically above ambient temperature. 6 Long term stability is specified in the full accuracy operating pressure range 0 … 65°C 7 Depends on application case, please contact Application Engineer for further questions BST-BMP280-DS001-10 | Revision 1.12 | July 2014 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.
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