Pressure sensor withstands harsh media

-January 01, 2018

With no exposed corrodible metals, the MLX90818 absolute pressure sensor from Melexis survives rugged automotive under-the-hood applications. The device is factory-calibrated to cover a range of 1.0 bar to 5.5 bar and stands up to harsh media, such as fresh air mixed with high concentrations of corrosive gases like engine exhaust and halogens.

Along with the MEMS sensor, the MLX90818 houses analog front-end circuitry, a 16-bit microcontroller, voltage regulators, and a SENT (single edge nibble transmission) driver in a tiny 4×5-mm DFN package. It also provides a provision for connecting an external NTC thermistor for temperature measurement. The MLX90818 requires very few external components, allowing OEMs to develop small and rugged MAP (manifold air pressure) sensors.

The MLX90818 pressure sensor operates over a temperature range of -40°C to +150°C and has an 18 V overvoltage capability. Pressure accuracy ranges from ±0.5% to ±0.75% to enable extended life operation at +150°C. The part’s digital output signal is based on the SAE J2716-compliant SENT protocol and can include compensated ±1°C accurate NTC temperature information.

MLX90818 product page

Melexis, www.melexis.com

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