Barometric Pressure Sensor (SMKB-FWS1)
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 sensor isbased on proven Piezo-resistive pressure sensor technology featuring high EMC robustness, high accuracy and linearity and long term stability .
The SMKB-BAROPRO-DI is an absolute barometric pressure sensor especially designed for industrial applications.
The sensor module is housed in an extremely compact metal-lid LGA package As the successor to the widely adopted SMKB-BAROECO delivers high performance in all applications that require precise pressure measurement. The sensor operates at lower noise,supports new filter modes and an SPI interface within a footprint 63% smaller than the older version.
It 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.
Applications
- Enhancement of GPS navigation (e.g. time-to-first-fix improvement, dead-reckoning, slope detection)
- Outdoor navigation, leisure and sports applications
- Weather forecast
- Vertical velocity indication (e.g. rise/sink speed) Target devices
- weather stations
| Operation range |
Pressure: 300...1100 hPa Temperature: -40…85°C |
| Relative accuracy p = 700…900hPa(Temp. @ 25°C) |
± 0.12 hPa (typical) equivalent to ±1 m |
| Average typical current consumption (1 Hz data rate) |
3.4 μA@ 1 Hz |
| Average current consumption (1 Hz data refresh rate) |
2.74 μA, typical (ultra-low power mode) |
| Average current consumption in sleep mode |
0.1 μA |
| Average measurement time |
5.5 msec (ultra-low power preset) |
| Supply voltage VDDIO |
1.2 ... 3.6 V |
| Supply voltage VDD |
1.71 ... 3.6 V |
| Resolution of data |
Pressure: 0.01 hPa ( < 10 cm) Temperature: 0.01° C |
| Temperature coefficient offset (+25°…+40°C @900hPa) |
1.5 Pa/K, equiv. to 12.6 cm/K |
| Interface |
I²C and SPI |
