Pressure Converter
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Low Pressure Digital Sensor (SM7X21)

The SM7221, SM7321 & SM7421 series is a digital, low pressure MEMS sensor family 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 a dual vertical porting option.  It is available in both compound gage or differential pressure configurations.  With the dual porting, a vacuum-gage measurement is possible to minimize altitude errors due to changes in ambient pressure.

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.

Customer-specified pressure ranges and supply voltages are available.
The SM7221, SM7321 & SM7421 series is shipped in sticks or tape & reel.

Key Attributes
Product SeriesSM7X21
Pressure Range0.15-0.29 PSI
Pressure TypeGauge,
Comp. Temp. Range-20°C to +85°C
Package TypeSOIC-16
Port TypeDual Vertical,
Dual Horizontal
Digital InterfaceI2C, 14 bit
Supply Voltage3.3 V/5 V