Mitsumi MMR940 Digital Output Differential Pressure Sensor
Mitsumi MMR940 Digital Output Differential Pressure Sensors provide factory-calibrated and temperature-compensated pressure measurements, eliminating the need for complex correction algorithms in the host system. The sensors digitally output corrected pressure data through an I2C interface, enabling straightforward integration with external microcontrollers. The Mitsumi MMR940 sensors feature a compact dual-nozzle package and support differential pressure ranges of ±20cmH2O to ±100cmH2O, depending on the model. Built-in low-pass filtering helps reduce measurement noise, while high resolution and low pressure error deliver reliable performance in airflow, medical, industrial, and environmental monitoring applications.
Features
- Dual nozzle 29mm x 18mm x 14.25mm (WxDxH) package
- Resistant to contamination
- Linearized and temperature-compensated
- Ultra-high resolution and large dynamic range
- Operating pressure ranges
- ±20cmH2O (±1.961kPa) for C02 rank
- ±40cmH2O (±3.922kPa) for C04 rank
- ±70cmH2O (±6.865kPa) for C07 rank
- ±100cmH2O (±9.807kPa) for C10 rank
- 0.002cmH2ORMS (0.196PaRMS) effective resolution (at MODE4)
- Corrects the differences of sensors and temperature characteristics
- Pressure measurement error
- ±3.0%FS (TBD) for C02 rank
- ±1.5%FS for C04 rank
- ±1.3%FS (TBD) for C07 rank
- ±1.2%FS (TBD) for C10 rank
- Digitally outputs the pressure value corrected in the module (I2C)
- 0x67 I2C slave address (7-bits)
- Noise reduction is possible with a built-in low-pass filter
- Contains halogen
- RoHS and REACH compliant
Applications
- CPAP flow measurement
- HVAC damper control (VAV)
- Refrigerator evaporator ice buildup
- Fan flow monitoring
- Burner modulation
Specifications
- Non-corrosive gas pressure medium (no condensation)
- 3.0V to 3.6V range, 3.3V typical
- 0.8mA current consumption
- 0.4ms, 0.8ms, 1.6ms, and 3.2ms conversion times
- Span accuracy from 0°C to +50°C
- ±1.3% FS for C02 rank
- ±0.65%FS for C04, C0, and C10 rank
- -40°C to +85°C temperature range
Resources
Overview
Block Diagram
Typical Application Circuit
Related Sensors
Mitsumi Digital Output Gauge Pressure Sensors
Digitally output a pressure value, which is corrected in the module by built-in sequencer (SPI/I2C).