MS5837 – Small absolute pressure sensor with high resolution

The reflowable air pressure sensors are designed for pressure ranges of 300–1’200 mbar (MS5837-02BA03) and 0–30 bar (MS5837-30BA) and are protected with a gel coating. In addition to the pressure, they also measure the temperature.

The MS5837 consist of a piezoresistive pressure cell and an amplifier A/D-interface-IC, housed in a QFN package (3.3 x 3.3 x 2.75 mm³). The metal top protects the electronic components and facilitates O-ring mounting.

The sensors convert the measured pressure- and temperature-dependent signal of the measuring cell into a 24-bit data word, then stored in the EPROM. In addition, 6 individual coefficients are stored, allowing a highly accurate software correction for the pressure and temperature measurement by an external microprocessor. The I²C interface is used for serial communication with the microprocessor.

MS5837 sensors are intended for applications within a digital system. With an existing processor at system level, temperature can be easily calculated.

AMSYS offers as further variants the MS5839, with chlorine-resistant gel protection and a grove board that can be used to quickly evaluate sensors and build prototypes.

Outstanding features:

• Pressure ranges absolut: 300–1‘200 mbar or 0 – 30 bar
• Temperature range: -40..+85 °C
• Resolution pressure: 0.016 mbar (MS5837-02BA03) / 0.2 mbar (MS5837-30BA)
• Resolution temperature: 0.002 °C
• Supply voltage 1.5–3.6 V
• Low power consumption: 0.6 μA (standby <0.1 μA)
• I²C interface
• Ceramic substrate with metal cap: 3.3 x 3.3 x 2.75 mm³
• RoHS and REACH compliant