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BMP388数据手册(BST-BMP388-DS001).pdf

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    Bosch Sensortec | BMP388 Datasheet 1 | 57 BMP388 Digital pressure sensor BMP388 – Datasheet Document revision 1.1 Document release date March 2018 Document number BST-BMP388-DS001-01 Technical reference code(s) 0 273 300 511 Notes Data and descriptions 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 appearance. Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet BMP388 Digital pressure sensor 2 | 57 The BMP388 is a digital sensor with pressure and temperature measurement based on proven sensing principles. The sensor module is housed in an extremely compact 10-pin metal-lid LGA package with a footprint of only 2.0 × 2.0 mm² and max 0.8 mm package height. Its small dimensions and its low power consumption of 3.4 µA @1Hz allow the implementation in battery driven devices such as mobile phones, GPS modules or watches. Typical applications  Vertical velocity indication (e.g. rise/sink speed)  Internet of things  Enhancement of GPS navigation  (e.g. time-to-first-fix improvement, dead-reckoning, slope detection) Indoor navigation & localization (floor detection, elevator detection)  Outdoor navigation, leisure and sports applications  Weather forecast  Health care applications (e.g. spirometry)  Fitness applications like enhancement of calorie detection  AR & VR applications  Context awareness Target Devices  Flying toys  Drones  Handsets such as mobile phones, tablet PCs, GPS devices  Navigation systems  Portable health care devices  Home weather stations  Watches  White goods Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet Key features 3 | 57 Package 2.0 mm x 2.0 mm x 0.75 mm metal lid LGA Table 1: Key Features of BMP388 Digital interface I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz) Supply voltage Relative accuracy Absolute accuracy Temperature coefficient offset Current consumption VDD main supply voltage range: 1.65 V to 3.6 V VDDIO interface voltage range: 1.2 V to 3.6 V typ. ± 8 Pa, equiv. to ± 0.66 m (900 … 1100 hPa, 25 . . . 40 °C ) typ. ± 50 Pa (300 ...1100 hPa, -20 ...+65 °C) typ. ± 0.75 Pa/K (0 ... 55°C @700 -1100 hPa) 3.4 µA at 1 Hz pressure and temperature 2.0 µA in sleep mode Operating range -40 ‒ +85 °C, 300‒1250 hPa The product is RoHS compliant, halogen-free, MSL1 BMP388 enables accurate altitude tracking and is specifically suited for drone applications. The best-in-class TCO between -20-65°C for accurate altitude measurement over a wide temperature range of the BMP388 greatly enhance the drone flying experience by making accurate steering easier. It is compatible for use with other Bosch sensors, including the new BMI088 for better performance, robustness and stability. The new BMP388 sensor offers outstanding design flexibility, providing a single package solution that can also be easily integrated into other existing and upcoming devices such as smart homes, industrial products and wearables. The sensor is more accurate than its predecessor BMP280, covering a wide measurement range from 300 hPa to 1250 hPa. This new barometric pressure sensor exhibits an attractive price-performance ratio coupled with low power consumption. It is available in a compact 10-in 2.0 x 2.0 x 0.75 mm³ LGA package with metal lid Due to the built-in hardware synchronization of the pressure sensor data and its ability to synchronize data from external devices such as acceleration sensors, the BMP388 is ideally suited for fitness and navigation applications which require highly accurate, low power and low latency sensor data fusion. The new interrupt functionality provides simple access to data and storage. Examples of interrupts than can be used in a power efficient manner without using software algorithms include: Data ready interrupt, watermark interrupt (on byte level) or FIFO full interrupt. BMP388 also includes a new FIFO functionality. This greatly improves ease of use while helping to reduce power consumption of the overall device system during full operation. The integrated 512 byte FIFO buffer supports low power applications and prevents data loss in non-real-time systems. Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet 4 | 57 Table of contents 1. Specification ..................................................................................................................................................................... 6 2. Absolute maximum ratings ............................................................................................................................................. 8 3. Functional description .................................................................................................................................................... 8 3.1. Block diagram ............................................................................................................................................................. 9 3.2. Power management ................................................................................................................................................. 10 3.3. Power modes ............................................................................................................................................................ 10 3.4. Measurement flow .................................................................................................................................................... 12 3.5. Filter selection ........................................................................................................................................................... 16 3.6. FIFO Description....................................................................................................................................................... 17 3.7. Interrupts ................................................................................................................................................................... 21 3.8. Current consumption ................................................................................................................................................ 25 3.9. Measurement timings ............................................................................................................................................... 25 3.10. Data readout from data registers ............................................................................................................................. 26 3.11. Output compensation .............................................................................................................................................. 27 4. Global memory map and register description ............................................................................................................ 28 4.1. General remarks ....................................................................................................................................................... 28 4.2. Datasheet Memory Map ........................................................................................................................................... 28 4.3. Register description .................................................................................................................................................. 30 5. Digital interfaces ............................................................................................................................................................ 39 5.1. Interface selection..................................................................................................................................................... 39 5.2. I²C Interface .............................................................................................................................................................. 39 5.3. SPI interface ............................................................................................................................................................. 41 5.4. Interface parameter specification ............................................................................................................................. 42 6. Pin-out and connection diagram .................................................................................................................................. 45 6.1. Pin-out ...................................................................................................................................................................... 45 6.2. Connection diagram ¾-wire SPI ............................................................................................................................... 46 6.3. Connection diagram I²C ............................................................................................................................................ 47 7. Package, reel and environment .................................................................................................................................... 48 7.1. Outline dimensions ................................................................................................................................................... 48 7.2. Landing pattern ......................................................................................................................................................... 48 Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet 5 | 57 7.3. Marking ..................................................................................................................................................................... 49 7.4. Soldering guidelines ................................................................................................................................................. 50 7.5. Tape and reel specification ....................................................................................................................................... 51 7.6. Mounting and assembly recommendations .............................................................................................................. 51 7.7. Environmental safety ................................................................................................................................................ 52 8. Legal disclaimer ............................................................................................................................................................. 53 8.1. Engineering samples ................................................................................................................................................ 53 8.2. Product use ............................................................................................................................................................... 53 8.3. Application examples and hints ................................................................................................................................ 53 9. Appendix: Computation formulae reference implementation ................................................................................... 54 9.1. Calibration coefficient ............................................................................................................................................... 54 9.2. Temperature compensation ...................................................................................................................................... 54 9.3. Pressure compensation ............................................................................................................................................ 55 10. Document history and modification ............................................................................................................................ 56 Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet 1. Specification If not stated otherwise, 6 | 57  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  Typical values of currents and state machine timings are determined at 25°C. minimum/maximum values of currents are determined at -40°C/85°C.  Minimum/maximum values of state machine timings are determined using corner lots over 0…+65 °C temperature range. Table 2: General electrical parameter specifications OPERATING CONDITIONS BMP388 Parameter Symbol Condition Operating temperature range Operating pressure range TA P operational full accuracy full accuracy Min -40 0 300 Typ 25 Max Unit +85 +65 °C 1250 hPa Sensor supply voltage Interface supply voltage VDD ripple max. 50mVpp 1.65 1.8 VDDIO 1.2 3.6 3.6 1.8 2 V V µA µA 700 800 300 400 µA ±0.081 ±66 ±0.75 ±1.0 ±0.50 ±0.40 hPa cm Pa/K Pa/K hPa hPa -1.5 ±0.50 1.5 hPa Sleep current IDD,sleep VDD = VDDIO 1.8-3.6 V during pressure measurement 900 … 1100 hPa 25 . . . 40 °C 700-1100 hPa 0 . . . 55 °C 700-1100 hPa -20 . . .0 °C 300. . 1100 hPa -20 . . . 65 °C 900. . 1100 hPa 25 . . . 40 °C 1100 . . 1250 hPa 0 . . 65 °C Peak current Ipeak Current at temperature measurement Relative accuracy pressure IDDT Arel Offset temperature coefficient TCO Absolute accuracy pressure AP full AP ext AP 1 Mean value Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet RP Pressure Resolution of output data in highest resolution mode at lowest bandwidth Noise in pressure Absolute accuracy temperature2 Vp,full Vp,filtered AT Full bandwidth, highest resolution See chapter 3.4.4 Lowest bandwidth, highest resolution See chapter 3.4.4 @ 25 °C 0 . . . +65 °C 12 months Long term stability3 Pstab Solder drifts Start-up time tstartup Minimum solder height 50 µm Time to first communication after both VDD > 1.58V and VDDIO > 0.65V Possible sampling fsample rate osrs_t = osrs_p = 1; See chapter 3.9 ODR accuracy tstandby 25°C 7 | 57 Pa Pa Pa °C °C hPa hPa 2 ms 200 Hz 0.016 1.2 0.03 ±0.3 ±0.50 ±0.33 < ±1.0 2 +/- 124 % 2 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. 3 Long term stability is specified in the full accuracy operating pressure range 0 … 65°C 4 From -40 to 85°C Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
    Bosch Sensortec | BMP388 Datasheet 8 | 57 2. Absolute maximum ratings The absolute maximum ratings are provided in Table 3 . Table 3: Absolute maximum ratings Parameter Symbol Condition Min Max Unit Voltage at any supply pin Voltage at any interface pin Storage temperature VDD and VDDIO Pin -0.3 3.8 Vss -0.3 VDDIO + 0.3 V V ≤ 65% rel. H. -45 +85 °C Overpressure survivability POVER Mechanical shock MS MIL-STD-883H 2002.5 Maximum allowable dust particle DustMAX ISO 12103-1 A2 inside package 2 000 000 Pa 12000 g 3005 µm ESD Charge device model (CDM) Class C2a: 500V to <750V Human body model Class 2: (HBM) 2 kV Note: Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified electrical characteristics (Table 2) may affect device reliability or cause malfunction. 3. Functional description The BMP388 consists of a Piezo-resistive pressure sensing element and a mixed-signal ASIC. The ASIC performs A/D conversions and provides the conversion results and sensor specific compensation data through a digital interface. BMP388 provides highest flexibility to the designer and can be adapted to the requirements regarding accuracy, measurement time and power consumption by selecting from a high number of possible combinations of the sensor settings. BMP388 can be operated in three power modes (see section 3.3): sleep mode | normal mode | forced mode In sleep mode, no measurements are performed. Normal mode comprises an automated perpetual cycling between an active measurement period and an inactive standby period. In forced mode, a single measurement is performed. When the measurement is finished, the sensor returns to sleep mode. 5 Defined by hole size Modifications reserved |Data subject not change without notice | Printed in Germany Document number: BST-BMEP388-DS001-01 Revision_1.1_032018
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