General description
The FXPQ3115BV is a compact, piezoresistive, absolute pressure sensor with an I2C digital interface. FXPQ3115BV has a wide operating range of 20 kPa to 110 kPa. This sensor is ideal for inhalers, continuous positive airway pressure (CPAP) masks, or other medical devices coming in contact with a patients airway. The MEMS and ASIC die are coated with a biomedically approved gel. The gel is a nontoxic, nonallergenic elastomer which meets all United States Pharmacopeia (USP) biological testing class VI requirements. The gel properties allow uniform pressure transmission to the MEMS diaphragm.

FEATUREs and benefits
• Operating range: 20 kPa to 110 kPa absolute pressure
• Calibrated range: 50 kPa to 110 kPa absolute pressure
• Calibrated temperature output: −40 °C to 85 °C
• I2C digital output interface
• Fully compensated internally
• Precision ADC resulting in 1.5 Pa of effective resolution
• Direct reading
   – Pressure: 20-bit measurement (Pascals)
      – 20 kPa to 110 kPa
   – Temperature: 12-bit measurement (°C)
      – –40 °C to 85 °C
• Programmable interrupts
• Autonomous data acquisition
   – Embedded 32-sample FIFO
   – Data logging up to 12 days using the FIFO
   – One-second to nine-hour data acquisition rate
• 1.95 V to 3.6 V supply voltage, internally regulated
• 1.6 V to 3.6 V digital interface supply voltage
• Operating temperature from −40 °C to +85 °C

APPLICATIONs
• Inhalers/nebulizers
• Medical tablets
• Health activity monitors
• Oxygen concentrators
• CPAP machine and mask
• Spyrometry