Pressure Converter
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Ultra Low Pressure Digital Sensor (SM9X31)

The SM9231 and SM9331 are digital, ultra-low pressure MEMS sensors offering state-of-the-art pressure transducer technology and CMOS mixed signal processing technology to produce a digital, fully conditioned, multi-order pressure and temperature compensated sensor in JEDEC standard SOIC-16 package with dual vertical ports. It is available in gauge and differential pressure configurations.  

Combining the pressure sensor with a signal-conditioning ASIC in a single package simplifies the use of advanced silicon micro-machined pressure sensors. The pressure sensor can be mounted directly on a standard printed circuit board and a high level, calibrated pressure signal can be acquired from the digital interface. This eliminates the need for additional circuitry, such as a compensation network or microcontroller containing a custom correction algorithm.


Please contact SMI Sales for the SM9x31 datasheet.

Key Attributes
Product SeriesSM9X31
Pressure Range+/-125 Pa, +/- 250 Pa, 0-250 Pa
Pressure TypeGauge,
Comp. Temp. Range-20°C to +85°C
Package TypeSOIC-16
Port TypeDual Vertical
Digital InterfaceI2C or SPI, 16 bit
Supply Voltage3.3 V/5 V

Flow and Pressure Measurement in Respiratory Medical Equipment

The movie illustrates the benefits of using the SM9000 Family and the SM6000 Family for air flow control in respiratory medical equipment.