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TE Connectivity / SMI SM933x Digital Differential Pressure Sensors

TE Connectivity / SMI SM933x Digital Differential Pressure Sensors are high-precision sensors for ultra-low-pressure measurements. The SM933x sensors offer state-of-the-art Micro-ElectroMechanical Systems (MEMS) pressure transducer technology and CMOS mixed signal processing technology. These differential pressure sensors combine pressure sensors with a signal-conditioning Application-Specific Integrated Circuit (ASIC) in a single package. 

The SM933x sensors provide less than 1%Full Scale (FS) total accuracy after board mount and system level autozero. These differential pressure sensors mount directly on a circuit board and the high-level calibrated pressure signal is accessible from the 16-bit I2C digital interface. The SM933x sensors are available in JEDEC standard SOIC-16 packages with a dual vertical porting option. These components provide a pressure calibrated and temperature compensated output. Typical applications include sleep apnea, CPAP, ventilators, pressure transmitters, and airflow measurement.

Features

  • MEMS pressure transducer and CMOS mixed signal processing technologies
  • 125Pa and 250Pa differential pressure ranges
  • <1%FS accuracy after autozero
  • 16-bit I2C digital interface
  • JEDEC standard SOIC-16 package
  • Pressure calibrated and temperature compensated output
  • Excellent warmup behavior and long-term stability
  • REACH, RoHS, and PFOS/PFOA compliant

Applications

  • Medical
    • Sleep apnea
    • Continuous Positive Airway Pressure (CPAP)
    • Ventilators
    • Gas flow instrumentation
    • Airflow monitors
    • Life sciences
  • Industrial
    • Heating, Ventilation, and Air Conditioning (HVAC)
    • Pressure transmitters
    • Pneumatic gauges
    • Pressure switches
    • Safety cabinets
    • Gas flow instrumentation

Specifications

  • 3V to 5.5V supply voltage (VDD)
  • -0.3V to (VDD+0.3)V digital IO voltage
  • ±10mA maximum digital I/O current
  • 7kPa minimum  proof pressure
  • 20kPa minimum burst pressure
  • -2kV to 2kV ESD Human Body Model (HBM) protection at all pins
  • Temperature ranges
    • -20°C to +85°C compensated
    • -40°C to +125°C storage

Dimensions

TE Connectivity / SMI SM933x Digital Differential Pressure Sensors
Publicado: 2018-05-22 | Actualizado: 2023-08-17