Ultra Low Gauge Pressure Digital Sensor (SM923X)

The SM9233 and SM9235 and SM9236 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 SM9233/SM9235/SM9236 devices feature gauge pressure measurement with pressure ranges of 0 to 250 Pa (SM9233), 0 to 300 Pa (SM9235) and 0 to 600 Pa (SM9236). The lowest available max pressure range equals 2.5 cmH2O.

 

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. The SM923X Series features a 16-bit I2C output signal. The calibration eliminates the need for additional circuitry, such as a compensation network or microcontroller containing a custom correction algorithm.

 

The SM923X Series is shipped in sticks or tape & reel.

Key Attributes 
Product SeriesSM923X
Pressure Range0 - 250 Pa (SM9233)
0 - 300 Pa (SM9235)
0 - 600 Pa (SM9236)
Pressure TypeGauge
Comp. Temp. Range-20°C to +85°C
Package TypeSOIC-16
Port TypeDual Vertical
Digital InterfaceI2C, 16 bit
Supply Voltage3.3 V/5 V
Accuracy after Autozero1.25 %FS (SM9233)
1 %FS (SM9235 and SM9236)

 

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.

12/10/2019 CET

Disclaimer

Contact SMI for part availability. Silicon Microstructures, Inc. Warranty & Disclaimer / Terms & Conditions apply.

Part Number Data Sheet Pressure Type Pmax (PSI) Calibrated Pmax Output Type Package Type Characteristics Request
SM9233-BCE-S-250-000 Gauge 0.0363 250 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1.25%FS
Shipped in Sticks

SM9233-BCE-S-250-002 Gauge 0.0363 250 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1.25%FS
Shipped in Sticks
Supply Voltage 5V

SM9235-BBE-S-300-000 Gauge 0.0435 300 Pa Digital (I²C) SOIC-16 Horizontal

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1%FS
Shipped in Sticks

SM9235-BCE-S-300-000 Gauge 0.0435 300 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1%FS
Shipped in Sticks

SM9235-BCE-S-300-002 Gauge 0.0435 300 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1%FS
Shipped in Sticks
Supply Voltage 5V

SM9236-BCE-S-600-000 Gauge 0.087 600 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1%FS
Shipped in Sticks

SM9236-BCE-S-600-002 Gauge 0.087 600 Pa Digital (I²C) SOIC-16 Vertical

Comp. Temp. -20˚C to +85˚C
Digital Accuracy after Autozero 1%FS
Shipped in Sticks
Supply Voltage 5V