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The MS5849 is a digital OEM sensor that measures the absolute pressure with high 24bit resolution. It is compensated and provides the measured values as digital output signals via an I²C or SPI interface.

The reflowable sensors are designed for the pressure ranges of 0.2 – 2 bar, 0.2 – 7 bar and 0.3 – 30 bar and are media-protected with a chlorine resistant gel coating. In addition to the pressure, they measure the temperature from -40 to +110 °C.

The MS5849 pressure sensors consist of a piezoresistive pressure cell and an amplifier A/D-interface-IC, housed in a QFN package (3.3 x 3.3 x 2.7 mm³). The grounded metal ring protects the electronic components and facilitates O-ring mounting. The sensor converts the measured pressure- and temperature-dependent signal of the measuring cell into a 24-bit data word. In addition, 6 individual coefficients are stored in the sensor, which allow the highly accurate software correction for the pressure and temperature measurement by an external microprocessor. The sensor can communicate with the microprocessor via I²C or SPI. This can also be used to set the oversampling rate and the speed and power requirements.

Types of pressure and ranges for the MS5849
- MS5849-02BA - 0,2 .. 2 bar
- MS5849-07BA - 0,2 .. 7 bar
- MS5849-30BA - 0,3 .. 30 bar

Characteristics

• Pressure ranges absolute: 0.2 .. 2 bar, 0.2 .. 7 bar and 0.3 .. 30 bar
• Operating temperature range: -20..+85 (2 bar and 7 bar) -40..+110 °C (30 bar)
• Chlorine resistant gel
• Resolution pressure: 0.016 mbar
• Total pressure error <0.7% (for 0°C < T < 60°C)
• Resolution temperature: 0.0009 °C
• Supply voltage 1.5 – 3.6 V
• Low power consumption: 0.34 μA (one measurement/s; standby typ. 0.1 μA)
• I²C and SPI interface
• Ceramic substrate with metal cap: 3.3 x 3.3 x 2.7 mm³
• RoHS and REACH compliant