MMR940

This sensor provides a digital output for low differential pressure. The output is compensated for sensor-specific variations and temperature characteristics, eliminating the need for sensor calibration by the user. The interface is I2C.

Outline

The MMR940 digitally outputs a micro differential pressure value which was corrected. Customers need no correction because it corrects and outputs the differences of sensors and temperature characteristics. It does not require complicated sensor drive or control circuit, and devices with high performance can be made only with this module and an external microcontroller which will be the host.

Devices using air pressure
① Dual nozzle package
② A high-accuracy pressure value can be output
Operating pressure range -40~+40cmH2O
Effective resolution: 0.002cmH2ORMS
Pressure measurement error: ±0.5[%FS]
③ It corrects the differences of sensors and
temperature characteristics when shipped from
our factory
④ It digitally outputs pressure value (I2C)
⑤ Noise reduction is possible by a built-in LowPassFilter.

Pressure Type	Differential Pressure
Pressure Medium	Air (no Condensation)
Supply Voltage Range [V]	3.0 to 3.6
Operating Temperature Range [deg.C]	0 to 50
Operating Pressure Range [kPa]	±2 / ±4 / ±7 / ±10
Current Consumption [μA]	800
Pressure accuracy [Pa]	±20 /±40 /±70 / ±100
Pressure effective resolution [PaRMS]	1.8 / 0.9 / 0.4 / 0.2
Conversion Time [ms]	0.4 / 0.8 / 1.6 / 3.2
Interface	I2C