Compact barometric pressure sensor takes on temperature fluctuations
Rohm has developed a compact barometric pressure sensor that is waterproof and strong against temperature fluctuations and mechanical stress.
The BM1390GLV combines MEMS and control circuitry cultivated in the past with original waterproof technology to deliver IPX8 waterproof performance in a compact 2.0mm × 2.0mm × 1.0mm package.
A proprietary built-in temperature compensation function “ensures superior temperature characteristics”, says Rohm, while ceramic package help minimise fluctuations of device-specific characteristics caused by mechanical stress during board mounting. These features enable high accuracy barometric pressure measurement in applications requiring waterproof performance – which it is said was difficult to achieve until now – and in environments exposed to large temperature changes.
Barometric pressure sensors have become popular in wearables and smartphones for indoor navigation, and for acquiring altitude data in activity meters. In recent years, as applications have expanded, there has been an increased demand for waterproof and smaller barometric pressure sensors that are robust and resistant to external disturbances.
These sensors can be used in home appliances such as rice cookers and vacuum cleaners that require pressure control. They can also be used in Industrial equipment requiring waterproof performance, small IoT devices used outdoors and drones.