Barometric Air Pressure (BAP) Sensor (SM1131)

The SM1131 Series features an absolute pressure sensor for barometric air pressure measurement (BAP). It includes a piezo-resistive pressure sensor die and a signal processing IC, which performs amplification and thermal compensation of the pressure sensor output to provide a linear, thermally stable signal output. The sensor delivers calibrated output data - pressure and temperature - with an I2C interface.

The calibration of this device corrects for pressure nonlinearity. Also the temperature from an on-chip temperature sensor can be read via I2C, as well diagnosis data. The component can be set to sleep-mode with very low consumption by a specific command. Wake-up from sleep-mode requires a toggling SCL input.

Sensor specific calibration data, configuration and product ID are stored in an embedded non-volatile memory (NVM).


Key Attributes
Product SeriesSM1131
Pressure Range60 to 165 kPa
Pressure TypeAbsolute
Comp. Temp. Range-40°C to +125°C
Package TypeSOIC-8
Port TypeDual Hole
Digital Interface
I2C or SPI, 16 bit 
Supply Voltage3.3V/5V
Accuracy1.0 kPa
Part NumberPressure RangePressure TypeSupply VoltagePort Type
SM1131-EEG-S-165-0000 kPa - 165 kPaAbsolute3.3 VDual Hole
SM1131-EEG-T-165-0000 kPa - 165 kPaAbsolute3.3 VDual Hole
SM1131-EEG-S-165-0010 kPa - 165 kPaAbsolute5 VDual Hole
SM1131-EEG-T-165-0010 kPa - 165 kPaAbsolute5 VDual Hole