Pressure Converter
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Ultra Low Pressure Digital Sensor (SM933X)

The SM9333 and SM9336 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. The SM9333/SM9336 devices feature differential pressure measurement, the SM9333 offers a pressure range of -125 Pa to +125 Pa respectively, the SM9336 offers a pressure range of -250 Pa to +250 Pa.


The total accuracy after board mount and system level autozero is less than 1%FS. The excellent warmup behavior and long term stability further assures its expected performance over the life of the part.


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.


The SM9333/SM9336 are shipped in sticks or tape & reel.



Key Attributes
Product SeriesSM933X
Pressure Range+/-125 Pa, +/- 250 Pa
Pressure TypeDifferential
Comp. Temp. Range-20°C to +85°C
Package TypeSOIC-16
Port TypeDual Vertical
Digital InterfaceI2C, 16 bit
Supply Voltage3.3 V
Accuracy after Autozero
+/-1.25 %FS (SM9333)
+/-1 %FS (SM9336)

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.