The usefulness of wearable fitness trackers is directly related to the accuracy of their components. Temp sensors, GPS trackers, and timers must all be sensitive enough to track even the most minute details of a workout. Historically, elevation has also been tracked, with “distance climbed” or “distance descended” being fairly common. However, there is much more room for more granularity in this measurement. The BMP585 barometric pressure sensor from Bosch solves this problem, adding extreme accuracy to fitness wearables.
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What makes the Bosch BMP585 special?
Unlike older generations of barometric pressure sensors, the BMP585 sets itself apart with its extreme accuracy. Measuring changes in height of just a few centimeters, it can detect movements in fitness training down to the level of individual pull-ups or push-ups.
It’s also extremely rugged and able to withstand even the toughest workouts. The gel-filled cavity allows for the highest protection against water and other liquids such as chemicals. This makes it useful in water level detection and navigation applications.
What are some ideal applications for the Bosch BMP585?
Due to its small size, accurate sensing, and rugged performance, the BMP585 is useful in many applications, like:
- Sports activities in harsh environments
- Localization
- Navigation
- Industrial use in harsh environments
Specifications of the Bosch BMP585
| Package dimensions (typ.) | 3.25 x 3.25 x 1.86 mm³ metal lid LGA |
| Operating range (full accuracy) | Pressure: 300 - 1250 hPa |
| Supply voltage VDDIO | 1.08 V - 3.6 V |
| Supply voltage VDD | 1.71 V - 3.6 V |
| Interface | I2C, I3C and SPI |
| Average typical current consumption (1 Hz data rate) | 1.3 µA @ 1 Hz pressure and temperature, 0.55 µA in deep standby mode |
| Max. absolute accuracy P=300 ...1100 hPa (T= -5 ... 65 °C) |
± 50 Pa (pre-soldered) |
| Relative accuracy (typ.) p=700…1100 hPa (T= 15… 55 °C) |
± 6 Pa (pre-soldered) |
| Noise in pressure (typ.), highest resolution | 0.08 PaRMS |
| Temperature coefficient offset (typ.) (-5 … 65 °C @ 30-110 kPa) | ± 0.5 Pa/K (pre-soldered) |
| Long-term drift (typ.) | ± 0.2 hPa (12 months) |
| Solder drift (typ.) | ± 0.6 hPa |