Silicon Microstructures, Inc. (SMI) SM923x Series Ultra-Low Gauge Pressure Sensors

Silicon Microstructures, Inc. (SMI) SM923x Series Ultra-Low Gauge Pressure Sensor is a sensor that offers CMOS mixed signal processing technology and MEMS pressure transducer technology. The sensors have a temperature compensated digital sensor which is fully conditioned and in accordance with JEDEC standard with a dual vertical porting option. The accuracy after board mount and system-level auto zero is less than 1%FS. The pressure sensor is combined with a. ASIC (Single conditioning) in one package and this simplifies ht usage. It can be directly mounted to a PCB and calibrated using the digital interface. Hence there is no need for any more circuitry like a micro controller or compensation network.

FEATURES

1.Pressure ranges: 250 up to 600 Pa Gauge

2.Accuracy after Autozero: <1%FS

3.16 bit I2C Digital interface

4.Pressure calibrated and temperature compensated output

5.Compensated temperature range: -20°C to 85°C

APPLICATIONS

1.Medical

  • Sleep Apnea
  • CPAP
  • Ventilators
  • Gas Flow Instrumentation
  • Air Flow Monitors
  • Life Sciences

2.Industrial

  • HVAC / VAC
  • Airflow Measurement
  • Pressure Transmitters
  • Pneumatic Gauges
  • Pressure Switches
  • Safety Cabinets
  • Gas Flow Instrumentation

APPLICATIONS CIRCUIT

PRODUCTS

Part Number Operating Pressure Accuracy Operating Supply Voltage
SM9233-BCE-S-250-000 0 Pa to 250 Pa 3 % 3.3 V
SM9235-BCE-S-300-000 0 Pa to 300 Pa 2.5 % 3.3 V
SM9236-BCE-S-600-000 0 Pa to 600 Pa 1.5 % 3.3 V
SM9235-BCE-S-300-002 0 Pa to 300 Pa 2.5 % 5 V
SM9236-BCE-S-600-002 0 Pa to 600 Pa 1.5 % 5 V
SM9233-BCE-S-250-002 0 Pa to 250 Pa 3 % 5 V
SM9233-BCE-T-250-000 0 Pa to 250 Pa 3 % 3.3 V
SM9233-BCE-T-250-002 0 Pa to 250 Pa 3 % 5 V
SM9235-BCE-T-300-002 0 Pa to 300 Pa 2.5 % 5 V
SM9236-BCE-T-600-002 0 Pa to 600 Pa 1.5 % 5 V

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