BMP085 Digital Pressure Sensor Module (GY-65)

The BMP085 is a digital pressure sensor. Its absolute accuracy can reach 0.03 hPa and power consumption is extremely low, with a current of only 1 μA in standard mode. The BMP085 uses an ultra-thin 8-pin ceramic leadless chip carrier (LCC) package, allowing direct connection to various microprocessors via the I2C bus.

In addition to meteorological applications, the pressure sensor is primarily used to measure altitude. For example, to accurately determine whether someone is ascending or descending stairs during gait, horizontal height changes can be indirectly calculated by analyzing air pressure variations between floors.

For details on operation modes, please refer to the chip datasheet and DEMO CODE.

Specifications

• Pressure range: 300 - 1100 hPa (altitude 9000 m to -500 m)
• Power supply voltage: 1.8V - 3.6V (VDDA); 1.62V - 3.6V (VDDD)
• LCC8 Packaging: ceramic leadless chip carrier package (LCC)
• Dimensions: 5.0mm x 5.0mm x 1.2mm
• Low power consumption: 5 μA in standard mode
• High precision: in low-power mode, resolution is 0.06 hPa (0.5 m); in high linearity mode, resolution is 0.03 hPa (0.25 m)
• Includes temperature output
• I2C Interface
• Temperature Compensation
• Response time: 7.5ms
• Standby current: 0.1 μA
• No external clock circuit required
• Lead-free, RoHS compliant

Applications

• GPS precise navigation (dead reckoning, bridge detection, etc.)
• Indoor and outdoor navigation
• Monitoring of leisure, sports, and medical health
• Weather forecast
• Vertical speed indicator (rising/sinking speed)
• Fan power control

Download

• Datasheet
• Datasheet (BMP085)
• Schematic
• Demo Code